Pub Date : 2019-08-13DOI: 10.33928/bib.2019.01.185
P. Smith, Ben Deed
A spiny shrub native to north-west Pacific coasts, Rosa rugosa Thunb. (Japanese Rose) was introduced into Britain in the 19th century as a garden plant. It has since become a well-established and widespread naturalised alien, especially on sand-dunes, shingle beaches and other dry coastal habitats. The plant is also considered invasive on coasts of many other countries in Northwest Europe. Mounting concern about its recent spread on the internationally important sand-dune system of the Sefton Coast, north Merseyside, led to a volunteer survey being organised in 2014, involving 47 participants. They searched most of the 27 km-long coastal zone, recording almost 500 patches with a total area of nearly 6 ha. R. rugosa occurred especially on younger calcareous dunes (soil pH 5.6 – 8.2) near the sea and close to roads and human habitation. Few patches were found on older, more acidic duneland, or on a 5 km erosion front around Formby Point. This pattern of occurrence accords with that reported elsewhere for R. rugosa, indicating that the sea is implicated in the dispersion of propagules and that the species also establishes from anthropogenic sources, including ornamental plantings. It is concluded that the plant is a threat to dune habitats and species on the Sefton Coast. Control measures are discussed and the early stages of patch removal are described.
{"title":"Japanese Rose (Rosa rugosa): its invasion and colonisation of the Sefton Coast, north Merseyside, UK","authors":"P. Smith, Ben Deed","doi":"10.33928/bib.2019.01.185","DOIUrl":"https://doi.org/10.33928/bib.2019.01.185","url":null,"abstract":"A spiny shrub native to north-west Pacific coasts, Rosa rugosa Thunb. (Japanese Rose) was introduced into Britain in the 19th century as a garden plant. It has since become a well-established and widespread naturalised alien, especially on sand-dunes, shingle beaches and other dry coastal habitats. The plant is also considered invasive on coasts of many other countries in Northwest Europe. Mounting concern about its recent spread on the internationally important sand-dune system of the Sefton Coast, north Merseyside, led to a volunteer survey being organised in 2014, involving 47 participants. They searched most of the 27 km-long coastal zone, recording almost 500 patches with a total area of nearly 6 ha. R. rugosa occurred especially on younger calcareous dunes (soil pH 5.6 – 8.2) near the sea and close to roads and human habitation. Few patches were found on older, more acidic duneland, or on a 5 km erosion front around Formby Point. This pattern of occurrence accords with that reported elsewhere for R. rugosa, indicating that the sea is implicated in the dispersion of propagules and that the species also establishes from anthropogenic sources, including ornamental plantings. It is concluded that the plant is a threat to dune habitats and species on the Sefton Coast. Control measures are discussed and the early stages of patch removal are described.","PeriodicalId":254514,"journal":{"name":"British & Irish Botany","volume":"68 4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-08-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122559419","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2019-08-13DOI: 10.33928/bib.2019.01.202
A. Amphlett
Typically considered a coastal species in Great Britain, Juncus balticus Willd. also occurs inland as a native plant beside the Rivers Avon, Dulnain and Findhorn in NE Scotland (and beside the R. Lossie in the 19th Century). Here it is found at median altitude 290 m AOD (inter-quartile range, 249 - 341 m). It also occurs as a native at one inland loch-side, and was found beside another loch in the 19th Century. In total, J. balticus has been recorded beside inland rivers from 14 10 km grid squares. In its inland riverside habitat, J. balticus is overwhelmingly found within communities dominated by native plant taxa, primarily associated with infertile, moist to damp, weakly to moderately acid soils, with high levels of illumination. Few observers are familiar with seeing J. balticus at its inland sites, therefore it is possible that this species has been overlooked along other rivers and burns in NE Scotland, and perhaps elsewhere. The first record of J. balticus beside a road was in 1907, long before roads were widely treated with salt in the winter, but it was not until 1979 that a second roadside population was discovered. Roadside and trackside populations have now been found in 19 10 km grid squares. At most of these sites it is likely to be an accidental introduction. It is now more widespread on roadsides than along inland riversides. The isolated nature of the roadside populations indicates that there have been multiple independent colonisations. It is highly likely that additional roadside populations await discovery, and that further colonisation events will occur.
{"title":"Inland populations of Juncus balticus (Juncaceae) in Scotland","authors":"A. Amphlett","doi":"10.33928/bib.2019.01.202","DOIUrl":"https://doi.org/10.33928/bib.2019.01.202","url":null,"abstract":"Typically considered a coastal species in Great Britain, Juncus balticus Willd. also occurs inland as a native plant beside the Rivers Avon, Dulnain and Findhorn in NE Scotland (and beside the R. Lossie in the 19th Century). Here it is found at median altitude 290 m AOD (inter-quartile range, 249 - 341 m). It also occurs as a native at one inland loch-side, and was found beside another loch in the 19th Century. In total, J. balticus has been recorded beside inland rivers from 14 10 km grid squares. In its inland riverside habitat, J. balticus is overwhelmingly found within communities dominated by native plant taxa, primarily associated with infertile, moist to damp, weakly to moderately acid soils, with high levels of illumination. Few observers are familiar with seeing J. balticus at its inland sites, therefore it is possible that this species has been overlooked along other rivers and burns in NE Scotland, and perhaps elsewhere. The first record of J. balticus beside a road was in 1907, long before roads were widely treated with salt in the winter, but it was not until 1979 that a second roadside population was discovered. Roadside and trackside populations have now been found in 19 10 km grid squares. At most of these sites it is likely to be an accidental introduction. It is now more widespread on roadsides than along inland riversides. The isolated nature of the roadside populations indicates that there have been multiple independent colonisations. It is highly likely that additional roadside populations await discovery, and that further colonisation events will occur.","PeriodicalId":254514,"journal":{"name":"British & Irish Botany","volume":"42 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-08-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129451394","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2019-08-13DOI: 10.33928/bib.2019.01.243
J. Lucey
Most modern authorities have considered Euphorbia hyberna to be native in Britain but with the possibility that it could have been introduced from Ireland. The results from a literature survey, on the historical occurrence of the species, strongly suggest that it was introduced and has become naturalised at a few locations in south-west England.
{"title":"Euphorbia hyberna in England: native or naturalised?","authors":"J. Lucey","doi":"10.33928/bib.2019.01.243","DOIUrl":"https://doi.org/10.33928/bib.2019.01.243","url":null,"abstract":"Most modern authorities have considered Euphorbia hyberna to be native in Britain but with the possibility that it could have been introduced from Ireland. The results from a literature survey, on the historical occurrence of the species, strongly suggest that it was introduced and has become naturalised at a few locations in south-west England.","PeriodicalId":254514,"journal":{"name":"British & Irish Botany","volume":"205 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-08-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115496915","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2019-08-13DOI: 10.33928/bib.2019.01.219
D. Quigley, P. Gainey, A. Dinsdale
During 2015, two drift endocarps of Pangium edule were found stranded in southern British waters, the first from Dungeness, Kent (25/09/2015) and the second from Loe Bay Beach, Cornwall (13/11/2015). The specimens represent the first records of P. edule drift endocarps from British waters. Four specimens have previously been recorded from Dutch (3) and Danish (1) waters. A first record of P. edule from Bermuda (NW Atlantic) in mid-December 2015 is also reported.
2015年，在英国南部海域发现了两只被困的盘古内鲷，第一只来自肯特郡的Dungeness(2015年9月25日)，第二只来自康沃尔郡的Loe Bay Beach(2015年11月13日)。这些标本是英国水域中最早记录的内腕类。此前在荷兰(3)和丹麦(1)水域记录了4个标本。据报道，2015年12月中旬在百慕大(西北大西洋)首次记录到P. edule。
{"title":"Pangium edule (Achariaceae) drift endocarps first records from UK and Bermuda waters and a review of NW European records","authors":"D. Quigley, P. Gainey, A. Dinsdale","doi":"10.33928/bib.2019.01.219","DOIUrl":"https://doi.org/10.33928/bib.2019.01.219","url":null,"abstract":"During 2015, two drift endocarps of Pangium edule were found stranded in southern British waters, the first from Dungeness, Kent (25/09/2015) and the second from Loe Bay Beach, Cornwall (13/11/2015). The specimens represent the first records of P. edule drift endocarps from British waters. Four specimens have previously been recorded from Dutch (3) and Danish (1) waters. A first record of P. edule from Bermuda (NW Atlantic) in mid-December 2015 is also reported.","PeriodicalId":254514,"journal":{"name":"British & Irish Botany","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-08-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114140140","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2019-08-13DOI: 10.33928/bib.2019.01.231
T. Rich, L. Houston, S. Bird, V. Morgan, R. Stockdale, R. Jones, A. Goodwin, R. May, D. Sheil
A survey of the rare tree Sorbus cuneifolia T.C.G. Rich (Rosaceae), Llangollen whitebeam, was undertaken to inform a conservation programme as part of a collaborative project between Chester Zoo, the Clwydian Range and Dee Valley AONB, Denbighshire County Council and Natural Resources Wales. A field survey in September 2017 found 307 trees at Creigiau Eglwyseg (with another nine which were either S. cuneifolia or S. rupicola), and 8 trees at Blodwel Rock. The increase from 240 trees recorded in 1987 was attributed to differences in recording, though it has gone from Castell Dinas Bran. Tree growth indicators at Creigiau Eglwyseg show that the population is healthy with a wide range of tree sizes present and 66% of trees fruiting. Sorbus cuneifolia was confirmed as of conservation status ‘Endangered’; there are no immediate requirements for its conservation.
{"title":"Conservation status of Sorbus cuneifolia (Rosaceae), Llangollen whitebeam","authors":"T. Rich, L. Houston, S. Bird, V. Morgan, R. Stockdale, R. Jones, A. Goodwin, R. May, D. Sheil","doi":"10.33928/bib.2019.01.231","DOIUrl":"https://doi.org/10.33928/bib.2019.01.231","url":null,"abstract":"A survey of the rare tree Sorbus cuneifolia T.C.G. Rich (Rosaceae), Llangollen whitebeam, was undertaken to inform a conservation programme as part of a collaborative project between Chester Zoo, the Clwydian Range and Dee Valley AONB, Denbighshire County Council and Natural Resources Wales. A field survey in September 2017 found 307 trees at Creigiau Eglwyseg (with another nine which were either S. cuneifolia or S. rupicola), and 8 trees at Blodwel Rock. The increase from 240 trees recorded in 1987 was attributed to differences in recording, though it has gone from Castell Dinas Bran. Tree growth indicators at Creigiau Eglwyseg show that the population is healthy with a wide range of tree sizes present and 66% of trees fruiting. Sorbus cuneifolia was confirmed as of conservation status ‘Endangered’; there are no immediate requirements for its conservation.","PeriodicalId":254514,"journal":{"name":"British & Irish Botany","volume":"28 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-08-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132980929","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2019-05-21DOI: 10.33928/BIB.2019.01.070
P. Smith
A 2018 survey of the nationally ‘Vulnerable’ Blysmus compressus (Flat-sedge) in the Sefton Coast sand-dunes, north Merseyside (v.c.59, South Lancashire), aimed to update information collected on distribution and habitats a decade earlier. As in 2008, the plant was mainly found in calcareous dune-slacks of recent origin, with short, open, species-rich vegetation on gley soils with a relatively high pH. Sites with a lower sward height supported a higher percentage cover of B. compressus. The largest populations were associated with sites that had been disturbed by recreational trampling, occasional vehicle use and/or grazing, especially by rabbits. Twenty-two sites were recorded, seven being new. Overall, the area occupied by B. compressus declined by 17%, two 2008 sites being lost. Similarly, an estimate of 15-20,000 plants in the earlier survey fell to 12,600. Losses were attributed to vegetation overgrowth and scrub development, partly resulting from lower rabbit numbers and reduced management input. The plant occurred in a range of vegetation types but matches to known UK National Vegetation Classification communities were generally poor. Management methods to conserve B. compressus and other vulnerable taxa are discussed.
{"title":"Changing status of Blysmus compressus (Flat Sedge) in the Sefton Coast sand-dunes, north Merseyside, UK","authors":"P. Smith","doi":"10.33928/BIB.2019.01.070","DOIUrl":"https://doi.org/10.33928/BIB.2019.01.070","url":null,"abstract":"A 2018 survey of the nationally ‘Vulnerable’ Blysmus compressus (Flat-sedge) in the Sefton Coast sand-dunes, north Merseyside (v.c.59, South Lancashire), aimed to update information collected on distribution and habitats a decade earlier. As in 2008, the plant was mainly found in calcareous dune-slacks of recent origin, with short, open, species-rich vegetation on gley soils with a relatively high pH. Sites with a lower sward height supported a higher percentage cover of B. compressus. The largest populations were associated with sites that had been disturbed by recreational trampling, occasional vehicle use and/or grazing, especially by rabbits. Twenty-two sites were recorded, seven being new. Overall, the area occupied by B. compressus declined by 17%, two 2008 sites being lost. Similarly, an estimate of 15-20,000 plants in the earlier survey fell to 12,600. Losses were attributed to vegetation overgrowth and scrub development, partly resulting from lower rabbit numbers and reduced management input. The plant occurred in a range of vegetation types but matches to known UK National Vegetation Classification communities were generally poor. Management methods to conserve B. compressus and other vulnerable taxa are discussed.","PeriodicalId":254514,"journal":{"name":"British & Irish Botany","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121131078","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2019-05-21DOI: 10.33928/BIB.2019.01.128
C. Skilbeck, Iris Lynch, Maggie Ellenby, M. Spencer
Whilst determining the mayweed and chamomile specimens in the Natural History Museum’s British & Irish Herbarium we decided to produce a photographic guide and key to assist in the determination of these plants using achene morphology. Because of our observations, and in line with North American treatments, we propose recognising Matricaria discoidea subsp. discoidea and M. discoidea subsp. occidentalis as separate species. We also discuss possible introgression from Tripleurospermum maritimum subsp. phaeocephalum in northern parts of Birtain and Ireland, the implications for the taxonomy of Anthemis/Cota and Chamaemelum and the usefulness of achene glands in determination of specimens. Finally we consider the problems that may arise when using immature achenes and herbarium specimens for determination and we discuss the usefulness of being aware of changes in colour and form that occur during development, particularly as many collected specimens lacked ripe capitula.
{"title":"Achene Morphology of British and Irish Mayweeds and Chamomiles: implications for taxonomy and identification","authors":"C. Skilbeck, Iris Lynch, Maggie Ellenby, M. Spencer","doi":"10.33928/BIB.2019.01.128","DOIUrl":"https://doi.org/10.33928/BIB.2019.01.128","url":null,"abstract":"Whilst determining the mayweed and chamomile specimens in the Natural History Museum’s British & Irish Herbarium we decided to produce a photographic guide and key to assist in the determination of these plants using achene morphology. Because of our observations, and in line with North American treatments, we propose recognising Matricaria discoidea subsp. discoidea and M. discoidea subsp. occidentalis as separate species. We also discuss possible introgression from Tripleurospermum maritimum subsp. phaeocephalum in northern parts of Birtain and Ireland, the implications for the taxonomy of Anthemis/Cota and Chamaemelum and the usefulness of achene glands in determination of specimens. Finally we consider the problems that may arise when using immature achenes and herbarium specimens for determination and we discuss the usefulness of being aware of changes in colour and form that occur during development, particularly as many collected specimens lacked ripe capitula.","PeriodicalId":254514,"journal":{"name":"British & Irish Botany","volume":"199 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122553769","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2019-05-21DOI: 10.33928/BIB.2019.01.091
F. Rumsey, H. J. Crouch, R. Lansdown, M. Spencer
Bolboschoenus laticarpus Marhold, Hroudová, Zákravský & Ducháček (for which we suggest the common name Pedunculate Club-rush) is reported from the British Isles and the characters which distinguish it from B. maritimus (L.) Palla are given. The known English distribution is presented and placed in its wider geographical context. The ecology and history of this species in Britain are outlined and its likely status is considered. B. laticarpus is locally abundant and widely distributed in a range of natural and artificial habitats, particularly within the Somerset Levels and also in the flood plains of some larger rivers, where it is now known to have been long persistent. B. laticarpus appears to be a successful colonist, having arrived recently in several newly created, artificial habitats. The mode of introduction is unknown but believed to be natural, and indeed elsewhere in Europe it is reportedly increasing within its natural range, perhaps as a consequence of changes in land-use, eutrophication and potentially climate. We therefore regard it as a native taxon.
{"title":"Pedunculate Club-rush Bolboschoenus laticarpus (Cyperaceae) ‒ an overlooked native or a spreading neophyte?","authors":"F. Rumsey, H. J. Crouch, R. Lansdown, M. Spencer","doi":"10.33928/BIB.2019.01.091","DOIUrl":"https://doi.org/10.33928/BIB.2019.01.091","url":null,"abstract":"Bolboschoenus laticarpus Marhold, Hroudová, Zákravský & Ducháček (for which we suggest the common name Pedunculate Club-rush) is reported from the British Isles and the characters which distinguish it from B. maritimus (L.) Palla are given. The known English distribution is presented and placed in its wider geographical context. The ecology and history of this species in Britain are outlined and its likely status is considered. B. laticarpus is locally abundant and widely distributed in a range of natural and artificial habitats, particularly within the Somerset Levels and also in the flood plains of some larger rivers, where it is now known to have been long persistent. B. laticarpus appears to be a successful colonist, having arrived recently in several newly created, artificial habitats. The mode of introduction is unknown but believed to be natural, and indeed elsewhere in Europe it is reportedly increasing within its natural range, perhaps as a consequence of changes in land-use, eutrophication and potentially climate. We therefore regard it as a native taxon.","PeriodicalId":254514,"journal":{"name":"British & Irish Botany","volume":"30 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125968700","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2019-05-21DOI: 10.33928/BIB.2019.01.117
A. Amphlett
Deschampsia cespitosa (L.) P. Beauv. subsp. parviflora (Thuill.) Dumort was, to British and Irish botanists, a little known taxon prior to1988, and current distribution mapping shows a marked geographical recording bias. It is confirmed as being primarily a woodland taxon, at low altitudes; modal mean altitude 50-75 m AOD, with 97% of locations at ≤300 m AOD. A combination of woodland or shaded habitat, bright green narrow leaves, and delicate panicle, with small spikelets, is suggestive of subsp. parviflora. In combination, degree of leaf blade scabridity on the adaxial surface, appearance of papillae on flat surfaces of adaxial ridges of the leaf, and spikelet length, provide the most reliable means of distinguishing this subspecies from subsp. cespitosa. There is no reason to suspect that subsp. parviflora is increasing, rather it had previously been overlooked.
Deschampsia cespitosa (L.)测定。无性系种群。parviflora (Thuill)。对于英国和爱尔兰的植物学家来说，在1988年之前，Dumort是一个鲜为人知的分类单元，目前的分布地图显示出明显的地理记录偏差。它被证实主要是一个低海拔的林地分类群;模态平均海拔50 ~ 75 m AOD, 97%的位置在≤300 m AOD。林地或荫蔽生境的组合，明亮的绿色狭窄的叶，和精致的圆锥花序，具有小的小穗，是暗示亚纲。parviflora。叶片正面的粗糙程度、叶片正面脊平面上乳头的外观以及小穗的长度是区分该亚种与亚种的最可靠的方法。cespitosa。没有理由怀疑那艘潜水艇。细小菌群正在增加，而以前它被忽视了。
{"title":"Deschampsia cespitosa subsp. parviflora (Poaceae) - an overlooked woodland grass","authors":"A. Amphlett","doi":"10.33928/BIB.2019.01.117","DOIUrl":"https://doi.org/10.33928/BIB.2019.01.117","url":null,"abstract":"Deschampsia cespitosa (L.) P. Beauv. subsp. parviflora (Thuill.) Dumort was, to British and Irish botanists, a little known taxon prior to1988, and current distribution mapping shows a marked geographical recording bias. It is confirmed as being primarily a woodland taxon, at low altitudes; modal mean altitude 50-75 m AOD, with 97% of locations at ≤300 m AOD. A combination of woodland or shaded habitat, bright green narrow leaves, and delicate panicle, with small spikelets, is suggestive of subsp. parviflora. In combination, degree of leaf blade scabridity on the adaxial surface, appearance of papillae on flat surfaces of adaxial ridges of the leaf, and spikelet length, provide the most reliable means of distinguishing this subspecies from subsp. cespitosa. There is no reason to suspect that subsp. parviflora is increasing, rather it had previously been overlooked.","PeriodicalId":254514,"journal":{"name":"British & Irish Botany","volume":"136 10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131226173","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2019-05-21DOI: 10.33928/BIB.2019.01.107
P. Stroh
The results of monitoring a population of Anacamptis morio over a 40-year period (1978-2017) in a permanent plot at Upwood Meadows NNR, Huntingdonshire, are presented. Flowering and vegetative plants were recorded each year, with individuals relocated using phenomarkers and triangulation. The majority of plants flowered for over half of their lifespan, the average lifespan of an individual plant was almost 10 years, and the known maximum lifespan above-ground for an individual was at least 36 years. The average age of the cohort became much younger over the course of the study, with potential reasons given including extreme old age, a lack of recruitment, and climate.
{"title":"Long-term monitoring of Green-winged Orchid (Anacamptis morio) at Upwood Meadows NNR, Huntingdonshire","authors":"P. Stroh","doi":"10.33928/BIB.2019.01.107","DOIUrl":"https://doi.org/10.33928/BIB.2019.01.107","url":null,"abstract":"The results of monitoring a population of Anacamptis morio over a 40-year period (1978-2017) in a permanent plot at Upwood Meadows NNR, Huntingdonshire, are presented. Flowering and vegetative plants were recorded each year, with individuals relocated using phenomarkers and triangulation. The majority of plants flowered for over half of their lifespan, the average lifespan of an individual plant was almost 10 years, and the known maximum lifespan above-ground for an individual was at least 36 years. The average age of the cohort became much younger over the course of the study, with potential reasons given including extreme old age, a lack of recruitment, and climate.","PeriodicalId":254514,"journal":{"name":"British & Irish Botany","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124027147","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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