Pedro Henrique Cardoso, Diego Rafael Gonzaga, Marcelo Trovó
Stachytarpheta is mainly distributed in Brazil, where the knowledge of species richness is still in progress. Here, we describe S. meninii, a new micro-endemic species from the Diamantina Plateau, Espinhaço Range. It is a shrub that can reach up to 1.8 meters in height, with abundant pedicellate glandular trichomes, viscous, aromatic leaves, inflorescences with oblong-triangular bracts, and blue corollas, with a tube that is barely exserted from the calyx. The new species has been recorded from two gatherings from the same locality in the municipality of Serro, Minas Gerais state, and can be considered Critically Endangered (CR). Illustrations and a distribution map are provided for the recognition of S. meninii, along with an identification key for species of the genus found in Diamantina Plateau.
{"title":"Stachytarpheta meninii (Verbenaceae), a new micro-endemic and threatened species from the Diamantina Plateau in Minas Gerais state, Brazil","authors":"Pedro Henrique Cardoso, Diego Rafael Gonzaga, Marcelo Trovó","doi":"10.1111/njb.04200","DOIUrl":"https://doi.org/10.1111/njb.04200","url":null,"abstract":"<i>Stachytarpheta</i> is mainly distributed in Brazil, where the knowledge of species richness is still in progress. Here, we describe <i>S. meninii</i>, a new micro-endemic species from the Diamantina Plateau, Espinhaço Range. It is a shrub that can reach up to 1.8 meters in height, with abundant pedicellate glandular trichomes, viscous, aromatic leaves, inflorescences with oblong-triangular bracts, and blue corollas, with a tube that is barely exserted from the calyx. The new species has been recorded from two gatherings from the same locality in the municipality of Serro, Minas Gerais state, and can be considered Critically Endangered (CR). Illustrations and a distribution map are provided for the recognition of <i>S. meninii</i>, along with an identification key for species of the genus found in Diamantina Plateau.","PeriodicalId":54716,"journal":{"name":"Nordic Journal of Botany","volume":"56 2","pages":""},"PeriodicalIF":0.9,"publicationDate":"2023-12-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138504996","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
The genus Sanjappa, previously with the single species S. cynometroides in southern India, is expanded to include S. umbrosa, comb. nov., in northeastern India, Bangladesh, Myanmar and China (Yunnan) and S. vietnamica, sp. nov., in southern Vietnam. Sanjappa differs from Thailentadopsis, its sister genus in the Zapoteca clade, by having leaves with extrafloral nectaries in the form of sessile (versus stipitate) glands and elastically dehiscent, not moniliform pods (versus pods not elastically dehiscent and submoniliform). Sanjappaumbrosa and S. vietnamica differ from S. cynometroides by having bipinnate leaves with one pair of pinnae (versus simply pinnate leaves with two leaflets only) and a four-lobed (versus three-lobed) corolla. In S. umbrosa each pinna is 2–3-foliolate and paired stipular spines are mainly present on younger growth, whereas in S. vietnamica each pinna is (3–)4–5-foliolate and branches, including major ones, are armed with numerous paired spines with thickened bases. Synonymies, images and notes on distribution, habitat, taxonomy and conservation for the three species of Sanjappa are provided, and all names are typified. With the taxonomic changes proposed here, all Asian species previously treated as members of Calliandra have been accommodated outside this genus.
{"title":"Studies of Asian ‘Calliandra' lead to expansion of Sanjappa (Fabaceae-Caesalpinioideae)","authors":"Mats Thulin","doi":"10.1111/njb.04241","DOIUrl":"https://doi.org/10.1111/njb.04241","url":null,"abstract":"The genus <i>Sanjappa</i>, previously with the single species <i>S. cynometroides</i> in southern India, is expanded to include <i>S. umbrosa</i>, comb. nov., in northeastern India, Bangladesh, Myanmar and China (Yunnan) and <i>S. vietnamica</i>, sp. nov., in southern Vietnam. <i>Sanjappa</i> differs from <i>Thailentadopsis</i>, its sister genus in the <i>Zapoteca</i> clade, by having leaves with extrafloral nectaries in the form of sessile (versus stipitate) glands and elastically dehiscent, not moniliform pods (versus pods not elastically dehiscent and submoniliform). <i>Sanjappa</i> <i>umbrosa</i> and <i>S. vietnamica</i> differ from <i>S. cynometroides</i> by having bipinnate leaves with one pair of pinnae (versus simply pinnate leaves with two leaflets only) and a four-lobed (versus three-lobed) corolla. In <i>S. umbrosa</i> each pinna is 2–3-foliolate and paired stipular spines are mainly present on younger growth, whereas in <i>S. vietnamica</i> each pinna is (3–)4–5-foliolate and branches, including major ones, are armed with numerous paired spines with thickened bases. Synonymies, images and notes on distribution, habitat, taxonomy and conservation for the three species of <i>Sanjappa</i> are provided, and all names are typified. With the taxonomic changes proposed here, all Asian species previously treated as members of <i>Calliandra</i> have been accommodated outside this genus.","PeriodicalId":54716,"journal":{"name":"Nordic Journal of Botany","volume":"39 1","pages":""},"PeriodicalIF":0.9,"publicationDate":"2023-12-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138541884","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Since the first description of Salvia majdae (syn. Zhumeria majdae) in 1967, its taxonomic status has remained an enigma within Salvia senso lato due to its unusual characters, in particular the floral structure. Based on recent molecular phylogenetic data, two defensible opinions on its status have been proposed. Here, we studied the floral development of this species using scanning electron microscopy to resolve this ambiguity. The aspects of floral symmetry were also studied. Like species of Salvia and representative genera of Lamiaceae, the initiation sequence of sepals and stamens in S. majdae is unidirectional from adaxial to abaxial and reverse, respectively. The flowers show temporal overlaps in initiation of petals and stamens. However, in contrast, the bidirectional initiation of the petals in S. majdae is reversed, starting with the abaxial middle petal, followed by the two adaxial ones, and then finally ending with the two lateral ones. The filaments of the sterile stamens are elongated and exposed as staminodes thorough development. We conclude that subequal growth of the calyx lips, weak cochlear aestivation and bidirectional initiation of the petals and well‐developed sterile stamen primordia are responsible for the weak floral asymmetry in S. majdae. Based on these data, S. majdae shows significant differences from Salvia.
{"title":"The Iranian enigmatic endemic Salvia majdae (Lamiaceae): its taxonomic status based on floral ontogeny","authors":"Mahtab Shahraki, Iraj Mehregan, Yousef Ajani, Younes Asri","doi":"10.1111/njb.04170","DOIUrl":"https://doi.org/10.1111/njb.04170","url":null,"abstract":"Since the first description of Salvia majdae (syn. Zhumeria majdae) in 1967, its taxonomic status has remained an enigma within Salvia senso lato due to its unusual characters, in particular the floral structure. Based on recent molecular phylogenetic data, two defensible opinions on its status have been proposed. Here, we studied the floral development of this species using scanning electron microscopy to resolve this ambiguity. The aspects of floral symmetry were also studied. Like species of Salvia and representative genera of Lamiaceae, the initiation sequence of sepals and stamens in S. majdae is unidirectional from adaxial to abaxial and reverse, respectively. The flowers show temporal overlaps in initiation of petals and stamens. However, in contrast, the bidirectional initiation of the petals in S. majdae is reversed, starting with the abaxial middle petal, followed by the two adaxial ones, and then finally ending with the two lateral ones. The filaments of the sterile stamens are elongated and exposed as staminodes thorough development. We conclude that subequal growth of the calyx lips, weak cochlear aestivation and bidirectional initiation of the petals and well‐developed sterile stamen primordia are responsible for the weak floral asymmetry in S. majdae. Based on these data, S. majdae shows significant differences from Salvia.","PeriodicalId":54716,"journal":{"name":"Nordic Journal of Botany","volume":"49 2","pages":""},"PeriodicalIF":0.9,"publicationDate":"2023-12-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138504972","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Vladimir N. Godin, Aleksey Yu. Astashenkov, Vera A. Cheryomushkina, Kobil A. Bobokalonov
Gynodioecy has been identified to occur in the herbaceous polycarpic Origanum vulgare ssp. gracile growing in Tajikistan and is here described in detail for the first time. The investigated populations of O. vulgare ssp. gracile form two types of flowers, perfect and pistillate, on different individuals. In pistillate flowers, stamens are represented by staminodes. The size of many parts of the corolla and androecium of perfect flowers is significantly larger than in pistillate flowers. Four criteria have been identified that make it possible to reliably distinguish flowers of different sexual forms: the size of the corolla and its parts, the difference between calyx tube length versus corolla tube length, the position of the anthers, and the rate of development of stamens. Perfect flowers are characterized by strictly pronounced protandry. According to the pollen/ovule ratio (from 825 to 953), O. vulgare ssp. gracile is facultatively xenogamous. Hermaphrodites predominated (from 58.9 to 76.2%) in five of the investigated populations. The frequency of females in O. vulgare ssp. gracile was shown to be most dependent on annual precipitation. Finally, we discuss the presence and distribution of gynodioecy within the genus Origanum and its adaptive significance for the existence of populations of O. vulgare ssp. gracile.
{"title":"Gynodioecy of Origanum vulgare ssp. gracile (Lamiaceae) in Tajikistan","authors":"Vladimir N. Godin, Aleksey Yu. Astashenkov, Vera A. Cheryomushkina, Kobil A. Bobokalonov","doi":"10.1111/njb.04148","DOIUrl":"https://doi.org/10.1111/njb.04148","url":null,"abstract":"Gynodioecy has been identified to occur in the herbaceous polycarpic <i>Origanum vulgare</i> ssp. <i>gracile</i> growing in Tajikistan and is here described in detail for the first time. The investigated populations of <i>O. vulgare</i> ssp. <i>gracile</i> form two types of flowers, perfect and pistillate, on different individuals. In pistillate flowers, stamens are represented by staminodes. The size of many parts of the corolla and androecium of perfect flowers is significantly larger than in pistillate flowers. Four criteria have been identified that make it possible to reliably distinguish flowers of different sexual forms: the size of the corolla and its parts, the difference between calyx tube length versus corolla tube length, the position of the anthers, and the rate of development of stamens. Perfect flowers are characterized by strictly pronounced protandry. According to the pollen/ovule ratio (from 825 to 953), <i>O. vulgare</i> ssp. <i>gracile</i> is facultatively xenogamous. Hermaphrodites predominated (from 58.9 to 76.2%) in five of the investigated populations. The frequency of females in <i>O. vulgare</i> ssp. <i>gracile</i> was shown to be most dependent on annual precipitation. Finally, we discuss the presence and distribution of gynodioecy within the genus <i>Origanum</i> and its adaptive significance for the existence of populations of <i>O. vulgare</i> ssp. <i>gracile</i>.","PeriodicalId":54716,"journal":{"name":"Nordic Journal of Botany","volume":"57 3","pages":""},"PeriodicalIF":0.9,"publicationDate":"2023-12-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138504995","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
A new species, Astragalus roseocephalus sp. nov., is described and illustrated. It is known from Islamabad Capital Territory (Margalla hills), Rawalpindi district, Hazara and Kashmir. It belongs to Astragalus section Poliothrix Bunge. Morphologically, it is closely related to Astragalus leucocephalus Benth., but differs in height, presence of connate stipules, opposed to free lateral stipules in A. leucocephalus, stipule shape, leaf length, leaflet size, number, arrangement and shape, peduncle length, corolla colour, size and shape of standard, fruit shape and number of seeds. In addition, anatomy, pollen morphology, distribution and conservation status of the new species are discussed.
{"title":"Astragalus roseocephalus, a new species of section Poliothrix from Pakistan","authors":"Amjad Khan, Amir Sultan, Sayed Afzal Shah","doi":"10.1111/njb.03839","DOIUrl":"https://doi.org/10.1111/njb.03839","url":null,"abstract":"A new species, <i>Astragalus roseocephalus</i> sp. nov., is described and illustrated. It is known from Islamabad Capital Territory (Margalla hills), Rawalpindi district, Hazara and Kashmir. It belongs to <i>Astragalus</i> section <i>Poliothrix</i> Bunge. Morphologically, it is closely related to <i>Astragalus leucocephalus</i> Benth., but differs in height, presence of connate stipules, opposed to free lateral stipules in <i>A. leucocephalus,</i> stipule shape, leaf length, leaflet size, number, arrangement and shape, peduncle length, corolla colour, size and shape of standard, fruit shape and number of seeds. In addition, anatomy, pollen morphology, distribution and conservation status of the new species are discussed.","PeriodicalId":54716,"journal":{"name":"Nordic Journal of Botany","volume":"48 4","pages":""},"PeriodicalIF":0.9,"publicationDate":"2023-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138504973","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Eragrostris shrirangii (Poaceae), a new species from the Agra district of Uttar Pradesh, India, is described and illustrated. A morphological comparison of E. shrirangii and the closely related species E. henryi and E. minor is provided. In addition, habitat details, a distribution map and the conservation status of the new species are given.
{"title":"Eragrostis shrirangii sp. nov. (Poaceae) from Uttar Pradesh, India","authors":"Tushar Anilrao Lohit, Vijay Vishnu Wagh","doi":"10.1111/njb.04160","DOIUrl":"https://doi.org/10.1111/njb.04160","url":null,"abstract":"<i>Eragrostris shrirangii</i> (Poaceae), a new species from the Agra district of Uttar Pradesh, India, is described and illustrated. A morphological comparison of <i>E. shrirangii</i> and the closely related species <i>E. henryi</i> and <i>E. minor</i> is provided. In addition, habitat details, a distribution map and the conservation status of the new species are given.","PeriodicalId":54716,"journal":{"name":"Nordic Journal of Botany","volume":"58 1","pages":""},"PeriodicalIF":0.9,"publicationDate":"2023-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138504994","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Poa sachensis, a new species from the Sach Pass, Western Himalaya, is described and illustrated. It is a member of P. subg. Ochlopoa sect. Alpinae, and closely allied to P. alpina, but differs from the latter by its lower glume one-nerved, callus scantly hairy, lemma (3.87–) 4.18–4.54 (–4.65) mm long, purplish, surface between nerves glabrous, palea proliferate and keels ciliate 1/2nd to 1/3rd part, and two stamens in fertile floret with anther (2.42–) 2.67–3.08 (–3.21) mm long. Further, we have added P. diaphora var. alpina for the first time to the flora of India based on specimens collected from the semiarid habitats of Spiti Valley. Information on the distribution, habitat, flowering, and fruiting cycles is provided along with a distribution map for each taxon.
本文描述了西喜马拉雅萨赫山口的一新种——萨赫山口Poa sachensis。它是p子g中的一个元素。高雄科，与高雄花亲缘关系密切，但与后者的不同之处是其下颖片一神经，愈伤组织少毛，外稃(3.87 -)4.18-4.54(- 4.65)毫米长，带紫色，神经间表面无毛，稃增生，龙骨具缘毛的1/2至1/3部分，可育小花的两个雄蕊带花药(2.42 -)2.67-3.08(- 3.21)毫米长。此外，根据在斯皮提河谷半干旱生境采集的标本，我们首次在印度植物区系中增加了P. diaphora var. alpina。关于分布、栖息地、开花和结果周期的信息连同每个分类单元的分布图一起提供。
{"title":"New species and new record of the genus Poa L. (Poaceae, Pooideae, Poeae) from India","authors":"Sangam Sharma, Dileshwar Prasad, Shubham Jaiswal, Priyanka Agnihotri","doi":"10.1111/njb.04179","DOIUrl":"https://doi.org/10.1111/njb.04179","url":null,"abstract":"<i>Poa sachensis,</i> a new species from the Sach Pass, Western Himalaya, is described and illustrated. It is a member of <i>P.</i> subg. <i>Ochlopoa</i> sect. <i>Alpinae</i>, and closely allied to <i>P. alpina</i>, but differs from the latter by its lower glume one-nerved, callus scantly hairy, lemma (3.87–) 4.18–4.54 (–4.65) mm long, purplish, surface between nerves glabrous, palea proliferate and keels ciliate 1/2nd to 1/3rd part, and two stamens in fertile floret with anther (2.42–) 2.67–3.08 (–3.21) mm long. Further, we have added <i>P. diaphora</i> var. <i>alpina</i> for the first time to the flora of India based on specimens collected from the semiarid habitats of Spiti Valley. Information on the distribution, habitat, flowering, and fruiting cycles is provided along with a distribution map for each taxon.","PeriodicalId":54716,"journal":{"name":"Nordic Journal of Botany","volume":"53 1","pages":""},"PeriodicalIF":0.9,"publicationDate":"2023-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138504998","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Denise Moura Madeira, Renan de Soldi Matzner, Vinvivenci Filipe Pereira de Lima e Silva, Giuliano Barcelos, Cleber Rodrigo de Souza, Lucélia Rodrigues Santos, Felipe De Carvalho Araújo, Michael de Oliveira Alves Braga, Lidiany Carolina Arantes da Silva, Rafaella Tavares Pereira, Ana Lívia de Carvalho Rodrigues, Vinicius Andrade, Rubens Manoel dos Santos
In this study, we characterized and compared vegetation types associated with geomorphological units susceptible to distinct flooding levels. Differences in vegetation are related to landform variations. We aimed to 1) characterize the vegetation structure and quantify community compositional differences among landforms and 2) compare landforms soil characteristics and how these correlate with the tree vegetation. The study area is located in the Brazilian Caatinga domain, near the Verde Grande river, a tributary of São Francisco river (14°54′38ʺS, 43°42′53ʺW). We allocated six plots in each of the five landforms sampled (from wettest to driest sites): 1) marginal dike (RF – riparian forest), 2) upper terrace (RWF – riparian wetland forest), 3) lower terrace (WF – wetland forest), 4) lower plain (OFF – occasionally flooded forest) and 5) upper plain (UF – unflooded forest). We ran a non-metric multidimensional scaling, produced a Venn diagram, and performed a principal component analysis (PCA) on the soil data (compared through a Tukey test at 5% significance after a significant ANOVA). A total of 1422 individuals, 26 families, 70 genera and 89 species were recorded. The NMDS revealed two distinct floristic groups: one group is associated with landforms with assumed higher flood frequency (RF, RWF, WF) and one with less frequently flooded landforms (OFF and UF). The RF, OFF, and UF landforms contained exclusive species (that only occurred in the plots of a particular landform). The species Geofroea spinosa (Fabaceae) was responsible for 70% of the total biomass recorded in the landforms RWF and WF. The soil analysis showed a gradient of soil acidity and fertility related to water saturation, whereby the most frequently flooded plots had the highest acidity values and highest fertility. We found that flood-related conditions significantly influence tree community structure and species distribution in this floodplain in the Brazilian Caatinga domain.
在这项研究中，我们描述并比较了与易受不同洪水水平影响的地貌单元相关的植被类型。植被的差异与地形的变化有关。我们的目标是1)表征植被结构，量化不同地形的群落组成差异;2)比较地形、土壤特征及其与树木植被的关系。研究区位于巴西Caatinga域，靠近Verde Grande河，这是 o Francisco河的一条支流(14°54′38′S, 43°42′53′W)。我们在五种地形(从最湿地到最干地)中分别分配了6个样地:1)边缘堤(RF -河岸森林)，2)上层阶地(RWF -河岸湿地森林)，3)下层阶地(WF -湿地森林)，4)下层平原(OFF -偶尔淹水森林)和5)上层平原(UF -未淹水森林)。我们进行了非度量的多维尺度，制作了维恩图，并对土壤数据进行了主成分分析(PCA)(在显著方差分析后，通过Tukey检验进行了5%显著性的比较)。共记录到26科70属89种1422只。NMDS揭示了两个明显的区系类群:一类与假定洪水频率较高的地形(RF、RWF、WF)有关，另一类与假定洪水频率较低的地形(OFF和UF)有关。RF、OFF和UF地貌包含排他性物种(仅发生在特定地貌的样地中)。在RWF和WF两种地形中，棘豆科植物占总生物量的70%。土壤分析表明，土壤酸度和肥力的梯度与水饱和度有关，其中最频繁淹水的地块具有最高的酸度和最高的肥力。研究发现，洪水相关条件显著影响了巴西Caatinga地区漫滩的树木群落结构和物种分布。
{"title":"Flooding drives tropical dry forest tree community assembly in Southeast Brazil","authors":"Denise Moura Madeira, Renan de Soldi Matzner, Vinvivenci Filipe Pereira de Lima e Silva, Giuliano Barcelos, Cleber Rodrigo de Souza, Lucélia Rodrigues Santos, Felipe De Carvalho Araújo, Michael de Oliveira Alves Braga, Lidiany Carolina Arantes da Silva, Rafaella Tavares Pereira, Ana Lívia de Carvalho Rodrigues, Vinicius Andrade, Rubens Manoel dos Santos","doi":"10.1111/njb.03913","DOIUrl":"https://doi.org/10.1111/njb.03913","url":null,"abstract":"In this study, we characterized and compared vegetation types associated with geomorphological units susceptible to distinct flooding levels. Differences in vegetation are related to landform variations. We aimed to 1) characterize the vegetation structure and quantify community compositional differences among landforms and 2) compare landforms soil characteristics and how these correlate with the tree vegetation. The study area is located in the Brazilian <i>Caatinga</i> domain, near the Verde Grande river, a tributary of São Francisco river (14°54′38ʺS, 43°42′53ʺW). We allocated six plots in each of the five landforms sampled (from wettest to driest sites): 1) marginal dike (RF – riparian forest), 2) upper terrace (RWF – riparian wetland forest), 3) lower terrace (WF – wetland forest), 4) lower plain (OFF – occasionally flooded forest) and 5) upper plain (UF – unflooded forest). We ran a non-metric multidimensional scaling, produced a Venn diagram, and performed a principal component analysis (PCA) on the soil data (compared through a Tukey test at 5% significance after a significant ANOVA). A total of 1422 individuals, 26 families, 70 genera and 89 species were recorded. The NMDS revealed two distinct floristic groups: one group is associated with landforms with assumed higher flood frequency (RF, RWF, WF) and one with less frequently flooded landforms (OFF and UF). The RF, OFF, and UF landforms contained exclusive species (that only occurred in the plots of a particular landform). The species <i>Geofroea spinosa</i> (Fabaceae) was responsible for 70% of the total biomass recorded in the landforms RWF and WF. The soil analysis showed a gradient of soil acidity and fertility related to water saturation, whereby the most frequently flooded plots had the highest acidity values and highest fertility. We found that flood-related conditions significantly influence tree community structure and species distribution in this floodplain in the Brazilian Caatinga domain.","PeriodicalId":54716,"journal":{"name":"Nordic Journal of Botany","volume":"92 ","pages":""},"PeriodicalIF":0.9,"publicationDate":"2023-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138505003","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Malaxis ybytus is proposed as a new species from the wetlands of the Campos de Altitude of the Atlantic rainforest of south Brazil, Serra do AraçatubaPapanduva mountain chain. It is described, illustrated, and compared with other similar species. The new species is similar to Malaxis cipoensis and Malaxis sertulifera, but it is recognised by its flat to slightly conduplicate leaves, densely congested inflorescence with small flowers bearing free lateral sepals and four foveas in the lip. Due to the high degree of endemism in this environment, the few collection records and the anthropic pressure in the region, we infer that the species is critically endangered (CR) based in criterium D of the IUCN.
Malaxis ybytus是巴西南部大西洋热带雨林Campos de Altitude湿地的新种，Serra do araparatuba Papanduva山系。对其进行了描述、说明，并与其他类似物种进行了比较。这个新种与Malaxis cipoensis和Malaxis sertulifera相似，但它被识别出来是通过其平坦到稍微对生的叶子，密集拥挤的花序，带有自由侧萼片的小花和唇部的四个中心凹。由于该地区特有程度高，采集记录少，且受人类活动压力大，根据国际自然保护联盟(IUCN)的D标准，该物种属于极度濒危物种(CR)。
{"title":"A new Malaxis (Orchidaceae: Malaxidinae) from the Campos de Altitude of the Atlantic rainforest in southern Brazil","authors":"Thiago Faria dos Santos, Eric de Camargo Smidt","doi":"10.1111/njb.04164","DOIUrl":"https://doi.org/10.1111/njb.04164","url":null,"abstract":"<i>Malaxis ybytus</i> is proposed as a new species from the wetlands of the Campos de Altitude of the Atlantic rainforest of south Brazil, Serra do AraçatubaPapanduva mountain chain. It is described, illustrated, and compared with other similar species. The new species is similar to <i>Malaxis cipoensis</i> and <i>Malaxis sertulifera</i>, but it is recognised by its flat to slightly conduplicate leaves, densely congested inflorescence with small flowers bearing free lateral sepals and four foveas in the lip. Due to the high degree of endemism in this environment, the few collection records and the anthropic pressure in the region, we infer that the species is critically endangered (CR) based in criterium D of the IUCN.","PeriodicalId":54716,"journal":{"name":"Nordic Journal of Botany","volume":"58 4","pages":""},"PeriodicalIF":0.9,"publicationDate":"2023-11-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138504993","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Yan‐Shuang Huang, Xin‐Yu Jia, Qiu‐Gen Zeng, Wei‐Liang Wen, Qiang Fan
Viola pendulipes (Violaceae), a new myrmecochous species from Baiwan Nature Reserve of Guangdong Province in China, is described and illustrated. Morphologically the new species is most similar to V. nanlingensis , but it is easily distinguished by having truncate or cuneate leaf base (versus cordate leaf base), robust rhizome with short internodes (versus slender rhizome with long internodes), curved and drooping peduncles in fruit (versus erect peduncles in fruit), and oblong anterior petals (versus spatulate to rhombic anterior petals). Our phylogenetic analysis, based on ITS sequences, confirms that the new species belongs to V . subsect. Diffusae , and is most closely related to V. yunnanensis .
{"title":"<i>Viola pendulipes</i> (Violaceae), a new species from Guangdong Province, China","authors":"Yan‐Shuang Huang, Xin‐Yu Jia, Qiu‐Gen Zeng, Wei‐Liang Wen, Qiang Fan","doi":"10.1111/njb.04165","DOIUrl":"https://doi.org/10.1111/njb.04165","url":null,"abstract":"Viola pendulipes (Violaceae), a new myrmecochous species from Baiwan Nature Reserve of Guangdong Province in China, is described and illustrated. Morphologically the new species is most similar to V. nanlingensis , but it is easily distinguished by having truncate or cuneate leaf base (versus cordate leaf base), robust rhizome with short internodes (versus slender rhizome with long internodes), curved and drooping peduncles in fruit (versus erect peduncles in fruit), and oblong anterior petals (versus spatulate to rhombic anterior petals). Our phylogenetic analysis, based on ITS sequences, confirms that the new species belongs to V . subsect. Diffusae , and is most closely related to V. yunnanensis .","PeriodicalId":54716,"journal":{"name":"Nordic Journal of Botany","volume":"45 5","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-11-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135681983","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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