Poa (Poaceae) of Colombia: A Taxonomic Revision1

IF 1.1 3区生物学 Q3 PLANT SCIENCES

Annals of the Missouri Botanical Garden Pub Date : 2020-07-16 DOI:10.3417/2020503

S. P. Sylvester, R. Soreng, William J. Bravo-Pedraza, Lia E. Cuta-Alarcon, D. Giraldo-Cañas

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引用次数: 2

Abstract

Abstract The grass genus Poa L. is widespread throughout temperate areas of the Andes, being a common constituent in the highly diverse but threatened high-elevation páramo grasslands of northwest South America. Knowledge of Poa from these páramo areas is very limited, however, with no comprehensive taxonomic treatments available for Colombia, which contains the largest area of páramo in the Neotropics and its surrounding countries. We present a taxonomic revision of Poa for Colombia accepting 15 species, including two recent combinations of Poa previously circumscribed in Aphanelytrum (Hack.) Hack. We describe a new species, P. colombiana Soreng & Sylvester, and a new variety, P. subspicata (J. Presl) Kunth var. glabrata Soreng & Sylvester, for Colombia and Ecuador. Poa colombiana is similar to P. aequatoriensis Hack. but differs in having lemmas pubescent on the keel and marginal veins, lemma apices weakly acute, flag leaf sheath margins fused 20%–38% their length, and anthers generally larger, > 1.2 mm long. Poa subspicata var. glabrata differs from P. subspicata s. str. in having glabrous lemmas. We provide two new records for Colombia of P. huancavelicae Tovar, and P. mucuchachensis Luces. Two species, P. orthophylla Pilg. and P. reclinata (Swallen) Soreng & P. M. Peterson, are considered endemic to Colombia. Poa soderstromii Negritto & Anton is placed as a subspecies of P. orthophylla, and P. leioclada Hack. is synonymized under P. mulalensis Kunth. The names P. annua L. var. exilis Tomm. ex Freyn, P. humilis Ehrh. ex Hoffm., P. infirma Kunth, P. leioclada, P. orthophylla, P. pauciflora Roem. & Schult., P. pratensis L. subsp. irrigata (Lindm.) H. Lindb., P. puberula Steud., P. pubiflora Benth., P. subcaerulea Sm., P. subspicata, and P. trachyphylla Pilg. are lectotypified, P. mulalensis is neotypified, and P. trachyphylla is epitypified. Four species are exotic and introduced from Europe: P. annua, P. infirma, P. pratensis, and P. trivialis L. We provide a key, descriptions, illustrations, distribution and habitat information, vouchers, and notes for each species.

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哥伦比亚菊科植物——分类订正1

草属Poa L.广泛分布于安第斯山脉的温带地区，是南美洲西北部高度多样化但受到威胁的高海拔páramo草原的共同组成部分。然而，来自这些páramo地区的Poa知识非常有限，没有针对哥伦比亚的综合分类处理方法，哥伦比亚是新热带地区及其周边国家中páramo面积最大的国家。本文对哥伦比亚的Poa进行了分类修订，收录了15种Poa，其中包括两个以前在Aphanelytrum (Hack)限定的Poa的新组合。黑客。我们描述了哥伦比亚和厄瓜多尔的一个新种，P. columbiana soren&sylvester，和一个新变种，P. subspicata (J. Presl) Kunth var. glabrata soren&sylvester。Poa colombiana与P. aequatoriensis Hack相似。但是不同的是在龙骨和边缘脉上有外稃短柔毛，外稃先端弱锐尖，叶鞘边缘融合20%-38%他们的长度，和花药一般较大，bb10 1.2毫米长。在具有无毛外稃方面，亚spicata变种与亚spicata s.s。我们在哥伦比亚提供了2个新记录的P. huancavelicae Tovar和P. mucuchachensis Luces。两种，直叶茅。P. reclinata (Swallen) Soreng和P. M. Peterson被认为是哥伦比亚的地方性疾病。Poa soderstromii Negritto & Anton被认为是P. orthophylla和P. leioclada Hack的一个亚种。与mulalensis Kunth同义。这些名字是p.a annua L. var. exilis Tomm.。前弗林，P. humilis Ehrh。Hoffm交货。，锦葵，锦葵，直叶锦葵，少花锦葵。& Schult。;草地草亚种;irrigata (Lindm)。h . Lindb。，被微柔毛扁豆。， P. publicflora底;， P.网膜下;亚spicata和粗叶P.;是lectotyptype, mulalensis是neotyptype，而pachyphylla是epittyptype。从欧洲引进的外来种有4种:P. annua、P. infirma、P. pratensis和P. trivialis L.。我们对每个种提供了关键字、描述、插图、分布和栖息地信息、凭证和注释。

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来源期刊

Annals of the Missouri Botanical Garden 生物-植物科学

CiteScore

3.60

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0.00%

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期刊介绍： The Annals of the Missouri Botanical Garden is a quarterly international journal primarily devoted to systematic botany and evolutionary biology. We encourage submissions of original papers dealing with significant advances in the taxonomy, phylogeny, biogeography, paleobiology, and evolution of plants, and in conservation genetics and biology, restoration ecology, and ethnobiology, using morphological and/or molecular characters, field observations, and/or database information. We also welcome reviews and papers on conceptual issues and new methodologies in systematics. Important floristic works will also be considered. Symposium proceedings discussing a broader range of topical biological subjects are also published, typically once a year. All manuscripts are peer-reviewed by qualified and independent reviewers.