Abstract: The Chihuahuan Desert Region (CDR) is the largest desert area in North America, and the southeastern portions contain the richest areas in Cactaceae in the continent. This research was advocated to understand the diversity of cacti in northern Zacatecas and southern Coahuila, as well as to explore species rarity, environmental relations and conservation alternatives. A geographical square measuring a quarter degree was intensively surveyed through 50, 3-km long transects, distributed in 25, 6-minute sub-squares. The geographical square was selected because of its altitudinal and environmental heterogeneity. Cacti were identified and local rareness observed, 764 specimens were deposited at the National Herbarium of Mexico (MEXU). Specimen and locality information were captured in the Database for Cacti of Central and North America. A general evaluation of the cactus diversity (species richness), levels of endemism and rarity were performed. A total of 45 species were found, just below El Huizache, Tolimán and Mier y Noriega, with 7 new records for Zacatecas, 2 for Coahuila and 3 for both Mexican states. We found 26 endemic species from the CDR, five endemic to the Main and Meridional subregions and 21 endemic to the Main subregion, sensu Hernández. Two species are endemic to the state of Zacatecas and three species are endemic to both states. A new index for rarity (Average rarity, Ar) is presented, obtained as the mean of five variables: level of endemism, species relative frequencies, local rareness, and climatic and edaphic (soil) specialization. Rabinowitz rarity (1981) was calculated for all species and transformed into numerical values to compare it with the obtained Ar values. There are 26 rare species following Rabinowitz and 16 rare species following Ar (≥0.5). Ar values resulted smooth and with a higher explanation power (r2). Just five species resulted with a Rabinowitz rarity of 7 (transformed R of 1) and Ar (≥0.82). A general complementarity analysis was used to address conservation in the studied area, which was enhanced with other four complementarity analyses, including our Ar. Nine sub-squares were found relevant for cacti protection. Soil types and a complete climatic analysis from original data were used to search for environmental relations through Principal Component Analyses. The main preferences for climatic variables and anomalies are highlighted. The Ar index is an adequate tool for measuring species rarity and presents it in a balanced and smooth way, not just fixed Rabinowitz categories, allowing the understanding that some species might be rare in different ways in different areas and environmental conditions, something that seems to occur in cacti. Further research is encouraged on Ar for comparisons and even mapping, as well as for Natural Protected Areas (NPA) design.
摘要/ Abstract摘要:奇瓦瓦沙漠地区(CDR)是北美最大的沙漠地区，其东南部是美洲大陆仙人掌科植物最丰富的地区。本研究旨在了解萨卡特卡斯州北部和科阿韦拉州南部仙人掌的多样性，并探讨其物种稀有度、环境关系和保护对策。对一个四分之一度的地理广场进行了深入调查，通过50,3公里长的横断面，分布在25,6分钟的子广场上。选择地理广场是因为其高度和环境的异质性。在墨西哥国家植物标本馆(Mexico National Herbarium, MEXU)保存了764份仙人掌标本。标本和地点信息收录在中北美洲仙人掌数据库中。对仙人掌的多样性(物种丰富度)、特有程度和稀有性进行了综合评价。总共发现了45个物种，仅次于埃尔韦萨切、Tolimán和米尔伊诺列加，萨卡特卡斯有7个新记录，科阿韦拉有2个，墨西哥两个州都有3个。共发现26种CDR特有种，5种Main和Meridional亚区特有种，21种Main亚区特有种(感觉值Hernández)。两种是萨卡特卡斯州特有的，三种是两州特有的。本文提出了一种新的稀有度指数(平均稀有度，Ar)，它是5个变量的平均值:地方性水平、物种相对频率、局部稀缺性以及气候和土壤专门化。计算了所有物种的Rabinowitz稀有度(1981)，并将其转换为数值，与得到的Ar值进行比较。Rabinowitz系列有26种，Ar(≥0.5)系列有16种。Ar值结果平滑且具有较高的解释能力(r2)。Rabinowitz稀有度为7(转化R为1)，Ar≥0.82，仅有5种。利用一般的互补分析来解决研究区域的保护问题，并与其他四种互补分析(包括我们的Ar)进行了增强。发现9个亚广场与仙人掌保护有关。利用原始数据的土壤类型和完整的气候分析，通过主成分分析来寻找环境关系。强调了气候变量和异常的主要偏好。Ar指数是衡量物种稀有性的一个足够的工具，它以一种平衡和平稳的方式呈现，而不仅仅是固定的Rabinowitz类别，允许理解某些物种可能在不同的地区和环境条件下以不同的方式稀有，这似乎发生在仙人掌身上。鼓励对Ar进行进一步的研究，以进行比较甚至绘图，以及自然保护区(NPA)的设计。
{"title":"Cacti in the Mazapil Region, Chihuahuan Desert, Mexico: Diversity, Geographical Patterns and Conservation","authors":"David Brailovsky Signoret, H. Hernández","doi":"10.2985/026.028.0103","DOIUrl":"https://doi.org/10.2985/026.028.0103","url":null,"abstract":"Abstract: The Chihuahuan Desert Region (CDR) is the largest desert area in North America, and the southeastern portions contain the richest areas in Cactaceae in the continent. This research was advocated to understand the diversity of cacti in northern Zacatecas and southern Coahuila, as well as to explore species rarity, environmental relations and conservation alternatives. A geographical square measuring a quarter degree was intensively surveyed through 50, 3-km long transects, distributed in 25, 6-minute sub-squares. The geographical square was selected because of its altitudinal and environmental heterogeneity. Cacti were identified and local rareness observed, 764 specimens were deposited at the National Herbarium of Mexico (MEXU). Specimen and locality information were captured in the Database for Cacti of Central and North America. A general evaluation of the cactus diversity (species richness), levels of endemism and rarity were performed. A total of 45 species were found, just below El Huizache, Tolimán and Mier y Noriega, with 7 new records for Zacatecas, 2 for Coahuila and 3 for both Mexican states. We found 26 endemic species from the CDR, five endemic to the Main and Meridional subregions and 21 endemic to the Main subregion, sensu Hernández. Two species are endemic to the state of Zacatecas and three species are endemic to both states. A new index for rarity (Average rarity, Ar) is presented, obtained as the mean of five variables: level of endemism, species relative frequencies, local rareness, and climatic and edaphic (soil) specialization. Rabinowitz rarity (1981) was calculated for all species and transformed into numerical values to compare it with the obtained Ar values. There are 26 rare species following Rabinowitz and 16 rare species following Ar (≥0.5). Ar values resulted smooth and with a higher explanation power (r2). Just five species resulted with a Rabinowitz rarity of 7 (transformed R of 1) and Ar (≥0.82). A general complementarity analysis was used to address conservation in the studied area, which was enhanced with other four complementarity analyses, including our Ar. Nine sub-squares were found relevant for cacti protection. Soil types and a complete climatic analysis from original data were used to search for environmental relations through Principal Component Analyses. The main preferences for climatic variables and anomalies are highlighted. The Ar index is an adequate tool for measuring species rarity and presents it in a balanced and smooth way, not just fixed Rabinowitz categories, allowing the understanding that some species might be rare in different ways in different areas and environmental conditions, something that seems to occur in cacti. Further research is encouraged on Ar for comparisons and even mapping, as well as for Natural Protected Areas (NPA) design.","PeriodicalId":50413,"journal":{"name":"Haseltonia","volume":"1 1","pages":"25 - 38"},"PeriodicalIF":1.5,"publicationDate":"2022-02-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82896300","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}
Abstract: A new record of Crassulaceae, namely plants that may belong to Umbilicus botryoides Hochst. ex A.Rich., is documented for the Angolan Flora. These plants were observed on the western edge of the Huila plateau near the town of Lubango. They extend the known distribution of Umbilicus in Africa from around 8° S in Tanzania to just about 15° S.
{"title":"Umbilicus, a New Record for Angola in the Crassulaceae","authors":"P. Bruyns, C. Klak","doi":"10.2985/026.028.0104","DOIUrl":"https://doi.org/10.2985/026.028.0104","url":null,"abstract":"Abstract: A new record of Crassulaceae, namely plants that may belong to Umbilicus botryoides Hochst. ex A.Rich., is documented for the Angolan Flora. These plants were observed on the western edge of the Huila plateau near the town of Lubango. They extend the known distribution of Umbilicus in Africa from around 8° S in Tanzania to just about 15° S.","PeriodicalId":50413,"journal":{"name":"Haseltonia","volume":"11 1","pages":"39 - 41"},"PeriodicalIF":1.5,"publicationDate":"2022-02-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87833286","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}
Abstract: Ferocactus peninsulae (A.A.Weber) Britton & Rose (Cactaceae) has great potential for commercial exploitation by the horticulture industry. It is difficult to propagate vegetatively, and we investigated novel propagation methods. The objectives were to optimize the organic supplements in nutrient medium for seed germination, synthetic seed (synseeds) production, and in vitro and ex vitro retrieval of plantlets after 12 months of cold storage. Seeds were germinated on different strengths of Murashige and Skoog's (MS) nutrient media under variable temperatures. Full strength MS medium augmented with 2.0 mg L-1 6-benzylaminopu-rine (BAP) incubated at 24°C temperature was optimum for seed germination with 98% maximum response. Synseeds were produced from the eight-week-old in vitro germinated seedlings using 2% sodium alginate and 100 mM calcium chloride solutions. These were cold stored under low temperature (- 4°C) for 12 months. The highest percentage (92%) of synseed germination and seedling growth (4.2 cm shoot with 7.1 cm root) was attained on MS medium fortified with 1.0 mg L-1 BAP after 12 wk. About 80.5% of cold stored synseeds germinated under greenhouse conditions (ex vitro) on Soilrite® with healthy shoots (3.7 cm length) and well-developed roots (4.0 cm) within 12 wk. No apparent differences were observed between in vitro and ex vitro raised seedlings. These results would reveal the short-term cold preservation of germplasm of barrel cactus, and it is also effective in in vitro and ex vitro germination. A comparative micro-morpho-anatomical study of in vitro and acclimatized seedlings of F. peninsulae was conducted to understand the xeromorphic adaptations of cacti with reference to stomata, spines and internal anatomy peculiar to the arid environments.
{"title":"Synseeds for Propagation and Preservation of Ferocactus peninsulae (Cactaceae) and Xeromorphic Adaptations of Seedlings","authors":"M. Manokari, S. Priyadharshini, M. Shekhawat","doi":"10.2985/026.027.0110","DOIUrl":"https://doi.org/10.2985/026.027.0110","url":null,"abstract":"Abstract: Ferocactus peninsulae (A.A.Weber) Britton & Rose (Cactaceae) has great potential for commercial exploitation by the horticulture industry. It is difficult to propagate vegetatively, and we investigated novel propagation methods. The objectives were to optimize the organic supplements in nutrient medium for seed germination, synthetic seed (synseeds) production, and in vitro and ex vitro retrieval of plantlets after 12 months of cold storage. Seeds were germinated on different strengths of Murashige and Skoog's (MS) nutrient media under variable temperatures. Full strength MS medium augmented with 2.0 mg L-1 6-benzylaminopu-rine (BAP) incubated at 24°C temperature was optimum for seed germination with 98% maximum response. Synseeds were produced from the eight-week-old in vitro germinated seedlings using 2% sodium alginate and 100 mM calcium chloride solutions. These were cold stored under low temperature (- 4°C) for 12 months. The highest percentage (92%) of synseed germination and seedling growth (4.2 cm shoot with 7.1 cm root) was attained on MS medium fortified with 1.0 mg L-1 BAP after 12 wk. About 80.5% of cold stored synseeds germinated under greenhouse conditions (ex vitro) on Soilrite® with healthy shoots (3.7 cm length) and well-developed roots (4.0 cm) within 12 wk. No apparent differences were observed between in vitro and ex vitro raised seedlings. These results would reveal the short-term cold preservation of germplasm of barrel cactus, and it is also effective in in vitro and ex vitro germination. A comparative micro-morpho-anatomical study of in vitro and acclimatized seedlings of F. peninsulae was conducted to understand the xeromorphic adaptations of cacti with reference to stomata, spines and internal anatomy peculiar to the arid environments.","PeriodicalId":50413,"journal":{"name":"Haseltonia","volume":"2 1","pages":"81 - 94"},"PeriodicalIF":1.5,"publicationDate":"2021-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75947930","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}
Abstract: Cactus seeds have unusual properties that resist protein extraction, e.g. a thick testa (seed coat) and a high amount of mucilage within the cells. This study was performed to determine which method (phenol extraction, TCA/acetone extraction, or phosphate-TCA/acetone extraction) is optimal for extracting protein from seeds of three species of Opuntia: Opuntia robusta, Opuntia phaeacantha, and Opuntia engelmannii. Extracted protein was analyzed using a Bradford assay and SDS-PAGE with silver staining. Overall results revealed that the TCA/acetone and phosphate-TCA/acetone methods were far more effective at extracting protein compared to the phenol extraction method. These protein extraction results can be applied to future studies of proteins important for Opuntia seed germination and conservation.
{"title":"Comparison of Protein Extraction Methods from Seeds of Three Opuntia (Cactaceae) Species","authors":"David I. Warren, Peter H. Quach, Anne R. Gaillard","doi":"10.2985/026.027.0108","DOIUrl":"https://doi.org/10.2985/026.027.0108","url":null,"abstract":"Abstract: Cactus seeds have unusual properties that resist protein extraction, e.g. a thick testa (seed coat) and a high amount of mucilage within the cells. This study was performed to determine which method (phenol extraction, TCA/acetone extraction, or phosphate-TCA/acetone extraction) is optimal for extracting protein from seeds of three species of Opuntia: Opuntia robusta, Opuntia phaeacantha, and Opuntia engelmannii. Extracted protein was analyzed using a Bradford assay and SDS-PAGE with silver staining. Overall results revealed that the TCA/acetone and phosphate-TCA/acetone methods were far more effective at extracting protein compared to the phenol extraction method. These protein extraction results can be applied to future studies of proteins important for Opuntia seed germination and conservation.","PeriodicalId":50413,"journal":{"name":"Haseltonia","volume":"57 1","pages":"73 - 76"},"PeriodicalIF":1.5,"publicationDate":"2021-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86877744","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}
Abstract: The Coryphantha sneedii complex is a confusing assemblage of the following intergrading or ill-defined varieties: orcuttii, organensis, sandbergii, villardii, albicolumnaria, leei, guadalupensis, sneedii, and possibly other undescribed taxa. These varieties comprise a continuum of morphological forms, many with overlapping or proximate distributions, and with some morphological variability possibly arising from phenotypic plasticity to the point that the various variety names are not warranted. There is also debate about geographic range of varieties, e.g. is the type variety actually found in Carlsbad Caverns National Park, Big Bend National Park, and Bishop's Cap. Not only is it impossible to consistently distinguish individual plants of the different varieties of Coryphantha sneedii (Britton & Rose) A. Berger, but it is also sometimes impossible to distinguish them from the sympatric Coryphantha vivipara (Nuttall) Britton & Rose, especially from C. vivipara var. neomexicana (Engelmann) Backeberg. Coryphantha vivipara and C. sneedii are distinguishable from all other species of Coryphantha by their 0.5–1.0 mm diameter lenticular druses and usually (but not always) having green fruits/pericarpels, but these two species with overlapping distributions are not always clearly distinguishable from one another. I therefore propose subsuming the entire Coryphantha sneedii complex as a single variety of C. vivipara.
摘要/ Abstract摘要:喷嚏连科(Coryphantha打喷嚏)复合体是由以下混和或定义不清的品种组成的一个令人困惑的组合:orcutii、organensis、sandbergii、villardii、albicolumnaria、leei、guadalupensis、打喷嚏，可能还有其他未被描述的分类群。这些品种包括连续的形态形式，许多具有重叠或近似分布，并且由于表型可塑性可能引起一些形态变异，以至于各种品种名称不合理。关于品种的地理范围也存在争议，例如，类型品种实际上是在卡尔斯巴德洞穴国家公园，大本德国家公园和主教帽中发现的吗?不仅不可能始终区分不同品种的Coryphantha sneedii (Britton & Rose) A. Berger的单个植物，而且有时也不可能将它们与同域的Coryphantha vivipara (Nuttall) Britton & Rose区分开来。特别是来自C. vivipara var. neomexicana (Engelmann) Backeberg。vivipara和C.打喷嚏是区分于所有其他种类的连翘，其0.5-1.0 mm直径的透镜状突起，通常(但不总是)有绿色的果实/果皮，但这两个物种重叠分布并不总是清楚地区分彼此。因此，我建议将整个打喷嚏连翘(Coryphantha打喷嚏连翘)复合体归为vivipara的一个单一变种。
{"title":"The Coryphantha sneedii Complex is Indeed Complex and Continuously Intergrades with Coryphantha vivipara","authors":"Root Gorelick","doi":"10.2985/026.027.0106","DOIUrl":"https://doi.org/10.2985/026.027.0106","url":null,"abstract":"Abstract: The Coryphantha sneedii complex is a confusing assemblage of the following intergrading or ill-defined varieties: orcuttii, organensis, sandbergii, villardii, albicolumnaria, leei, guadalupensis, sneedii, and possibly other undescribed taxa. These varieties comprise a continuum of morphological forms, many with overlapping or proximate distributions, and with some morphological variability possibly arising from phenotypic plasticity to the point that the various variety names are not warranted. There is also debate about geographic range of varieties, e.g. is the type variety actually found in Carlsbad Caverns National Park, Big Bend National Park, and Bishop's Cap. Not only is it impossible to consistently distinguish individual plants of the different varieties of Coryphantha sneedii (Britton & Rose) A. Berger, but it is also sometimes impossible to distinguish them from the sympatric Coryphantha vivipara (Nuttall) Britton & Rose, especially from C. vivipara var. neomexicana (Engelmann) Backeberg. Coryphantha vivipara and C. sneedii are distinguishable from all other species of Coryphantha by their 0.5–1.0 mm diameter lenticular druses and usually (but not always) having green fruits/pericarpels, but these two species with overlapping distributions are not always clearly distinguishable from one another. I therefore propose subsuming the entire Coryphantha sneedii complex as a single variety of C. vivipara.","PeriodicalId":50413,"journal":{"name":"Haseltonia","volume":"42 1","pages":"40 - 59"},"PeriodicalIF":1.5,"publicationDate":"2021-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90665089","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}
Abstract: The taxonomy of the Agave kerchovei complex in the states of Puebla and Oaxaca is revisited, analyzed, and discussed, and the status of the names considered to be synonyms is explored and discussed. The status of names synonymized with A. kerchovei (A. convallis, A. dissimulans) is discussed considering new field data from the type localities, with the confirmation of A. convallis as a species as put forth by Garcia-Mendoza and reinstatement of A. dissimulans as a recognized species.
摘要:本文对普埃布拉州和瓦哈卡州的龙舌兰kerchovei复合体的分类进行了重新考察、分析和讨论，并探讨了被认为是同义词的名称的地位。结合型态地点的新野外资料，讨论了与a . kerchovei (a . conallis, a . dissimulans)同义的名称的地位，并确认了Garcia-Mendoza提出的a . conallis是一个种，并恢复了a . dissimulans作为公认种的地位。
{"title":"A Reevaluation of the Agave kerchovei Complex (Asparagaceae/Agavoideae) Including Expanded Descriptions of Three Species","authors":"G. Starr","doi":"10.2985/026.027.0107","DOIUrl":"https://doi.org/10.2985/026.027.0107","url":null,"abstract":"Abstract: The taxonomy of the Agave kerchovei complex in the states of Puebla and Oaxaca is revisited, analyzed, and discussed, and the status of the names considered to be synonyms is explored and discussed. The status of names synonymized with A. kerchovei (A. convallis, A. dissimulans) is discussed considering new field data from the type localities, with the confirmation of A. convallis as a species as put forth by Garcia-Mendoza and reinstatement of A. dissimulans as a recognized species.","PeriodicalId":50413,"journal":{"name":"Haseltonia","volume":"28 1","pages":"60 - 72"},"PeriodicalIF":1.5,"publicationDate":"2021-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78967933","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}
Abstract: Cylindropuntia leptocaulis cuttings produce new long-shoots from portions of cuttings that are both aboveground and belowground. New long-shoots arising aboveground appear normal, of the same size and morphology as the original cutting. New longshoots arising belowground, however, are ultra-thin (< 1mm diameter), approximately one-eighth the diameter of the already thin cuttings, have smaller redder photosynthetic leaves, and have hairs growing from their areoles, none of which have been previously reported. Long-shoots arising from belowground quickly grow wider, with normal green fleshy leaves, and non-hairy areoles after growing a few centimeters aboveground.
{"title":"Ultra-Thin Hairy New Shoots on Belowground Cuttings of Recently Rooted Cylindropuntia leptocaulis (Cactaceae)","authors":"Root Gorelick","doi":"10.2985/026.027.0113","DOIUrl":"https://doi.org/10.2985/026.027.0113","url":null,"abstract":"Abstract: Cylindropuntia leptocaulis cuttings produce new long-shoots from portions of cuttings that are both aboveground and belowground. New long-shoots arising aboveground appear normal, of the same size and morphology as the original cutting. New longshoots arising belowground, however, are ultra-thin (< 1mm diameter), approximately one-eighth the diameter of the already thin cuttings, have smaller redder photosynthetic leaves, and have hairs growing from their areoles, none of which have been previously reported. Long-shoots arising from belowground quickly grow wider, with normal green fleshy leaves, and non-hairy areoles after growing a few centimeters aboveground.","PeriodicalId":50413,"journal":{"name":"Haseltonia","volume":"169 1","pages":"113 - 115"},"PeriodicalIF":1.5,"publicationDate":"2021-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77509893","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}
Abstract: A new subgenus, Kalanchoe Adans. subg. Fernandesiae Gideon F.Sm. (Crassulaceae: Kalanchooideae), is described to accommodate the species of Kalanchoe with variously sized, round to paddle-shaped leaves, dense, club-shaped inflorescences, and cuneiform-quadrangular squamae. The subgenus is restricted to southern and south-tropical Africa.
{"title":"Kalanchoe Adans. subg. Fernandesiae Gideon F.Sm. (Crassulaceae subfam. Kalanchooideae), a New Subgenus from Southern and South-Tropical Africa","authors":"Gideon F. Smith","doi":"10.2985/026.027.0101","DOIUrl":"https://doi.org/10.2985/026.027.0101","url":null,"abstract":"Abstract: A new subgenus, Kalanchoe Adans. subg. Fernandesiae Gideon F.Sm. (Crassulaceae: Kalanchooideae), is described to accommodate the species of Kalanchoe with variously sized, round to paddle-shaped leaves, dense, club-shaped inflorescences, and cuneiform-quadrangular squamae. The subgenus is restricted to southern and south-tropical Africa.","PeriodicalId":50413,"journal":{"name":"Haseltonia","volume":"61 1","pages":"2 - 7"},"PeriodicalIF":1.5,"publicationDate":"2021-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79483808","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}
Abstract: Rhipsalis rhombea is common in living collections, but the name has been used ambiguously in recent decades and has never been typified. We review the taxonomic history of this species and conclude that the name can be applied unambiguously. We therefore establish a neotype for Rhipsalis rhombea Pfeiff. and give a detailed morphological characterization of the species. In addition, we have generated plastid DNA sequences of the neotype which allowed us to establish the phylogenetic placement of R. rhombea within Rhipsalis subg. Phyllarthrorhipsalis.
{"title":"Neotypification of Rhipsalis rhombea (Rhipsalideae, Cactaceae) and Its Taxonomic History","authors":"Ralf Bauer, N. Korotkova","doi":"10.2985/026.027.0111","DOIUrl":"https://doi.org/10.2985/026.027.0111","url":null,"abstract":"Abstract: Rhipsalis rhombea is common in living collections, but the name has been used ambiguously in recent decades and has never been typified. We review the taxonomic history of this species and conclude that the name can be applied unambiguously. We therefore establish a neotype for Rhipsalis rhombea Pfeiff. and give a detailed morphological characterization of the species. In addition, we have generated plastid DNA sequences of the neotype which allowed us to establish the phylogenetic placement of R. rhombea within Rhipsalis subg. Phyllarthrorhipsalis.","PeriodicalId":50413,"journal":{"name":"Haseltonia","volume":"51 1","pages":"95 - 101"},"PeriodicalIF":1.5,"publicationDate":"2021-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89266216","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}
R. Kiesling, Lidia Pérez de Molas, L. Oakley, D. Schweich, M. L. Las Peñas, Aymeric de Barmon, D. Metzing
Abstract: The first discovery of Mediocactus hahnianus was attributed to Harry Blossfeld. Based on literature analysis, it is shown that T. Rojas and A.M. Friedrich plausibly made the discovery in the mid-1930s, and that seeds or cuttings were then given to Marsoner and eventually arrived at R. Blossfeld's nursery via H. Blossfeld. Although cultivated in Europe by Hahn, the plant is presently known only from the clone grown by J. West in the US, and obtained from Rojas in 1937. Recently, a new colony has been found and it seems to be a single clone. It perfectly fits the US clone from the point of view of morphology, flowers, growth habit, chromosome number, and seed morphology, whereas the localities are 400 km away from each other. Taxonomy and nomenclature are discussed: We decided to retain the species in Trichocereus, using a conservative concept for the genus based on morphological characters. A neotype for Mediocactus hahnianus is designated here.
{"title":"Mediocactus hahnianus: A Resolved Enigma and a New Chapter of Its History","authors":"R. Kiesling, Lidia Pérez de Molas, L. Oakley, D. Schweich, M. L. Las Peñas, Aymeric de Barmon, D. Metzing","doi":"10.2985/026.027.0105","DOIUrl":"https://doi.org/10.2985/026.027.0105","url":null,"abstract":"Abstract: The first discovery of Mediocactus hahnianus was attributed to Harry Blossfeld. Based on literature analysis, it is shown that T. Rojas and A.M. Friedrich plausibly made the discovery in the mid-1930s, and that seeds or cuttings were then given to Marsoner and eventually arrived at R. Blossfeld's nursery via H. Blossfeld. Although cultivated in Europe by Hahn, the plant is presently known only from the clone grown by J. West in the US, and obtained from Rojas in 1937. Recently, a new colony has been found and it seems to be a single clone. It perfectly fits the US clone from the point of view of morphology, flowers, growth habit, chromosome number, and seed morphology, whereas the localities are 400 km away from each other. Taxonomy and nomenclature are discussed: We decided to retain the species in Trichocereus, using a conservative concept for the genus based on morphological characters. A neotype for Mediocactus hahnianus is designated here.","PeriodicalId":50413,"journal":{"name":"Haseltonia","volume":"36 1","pages":"29 - 39"},"PeriodicalIF":1.5,"publicationDate":"2021-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81409870","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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