Poa laegaardiana, a new species from Ecuador (Poaceae, Pooideae, Poeae, Poinae)

Peterson, Paul M.; Soreng, Robert J.

doi:10.3897/phytokeys.100.25387

Cited by 4 publications

(1 citation statement)

References 9 publications

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“…Poa (Poaceae, Pooideae, Poeae) is one of the largest genera of grasses, and has a cosmopolitan distribution, principally in temperate regions of both hemispheres and in mountainous regions of the tropics (Soreng et al 2017, Peterson and Soreng 2018). It is a monophyletic genus and is divided into seven subgenera based on molecular phylogeny with support of morphology viz., P. subg.…”

Section: Introductionmentioning

confidence: 99%

New species and new record of the genus Poa L. (Poaceae, Pooideae, Poeae) from India

Sharma,

Prasad,

Jaiswal

et al. 2023

Nordic Journal of Botany

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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.Keywords: alpine grasses, Poa alpina, P. subg. Pseudopoa, P. subg. Ochlopoa, Western Himalaya

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Section: Introductionmentioning

confidence: 99%

New species and new record of the genus Poa L. (Poaceae, Pooideae, Poeae) from India

Sharma,

Prasad,

Jaiswal

et al. 2023

Nordic Journal of Botany

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Resolving páramoPoa(Poaceae): morphometric and phylogenetic analysis of the ‘Cucullatacomplex’ of north-west South America

Sylvester

Soreng

Gilliespie

2021

Botanical Journal of the Linnean Society

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Species delimitation in the Poa taxa of the ‘Cucullata complex’ from the páramos of north-west South America, morphologically defined by open panicles and webbed calluses, among other characters, has been complicated by their large morphological variability coupled with a lack of available taxonomic treatments. Using multivariate morphometric and phylogenetic analyses, distinct groupings of taxa were identified including the new páramo taxa, P. bricenoi sp. nov. from Venezuela and P. cucullata subsp. cucullatella subsp. nov. from Ecuador, which are described and illustrated. Poa scabrivaginata is also presented as a new record for Ecuador and páramo vegetation in general. Based on the results from this study, updated descriptions and images are also presented for P. chirripoensis, P. cucullata s.s., P. petrosa and P. scabrivaginata, and an identification key is provided for the species of the Cucullata complex and other open-panicled Poa spp. from Ecuador, Colombia and Venezuela.

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Poa (Poaceae) of Colombia: A Taxonomic Revision

Sylvester

Soreng

Bravo-Pedraza

et al. 2020

annals

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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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Poa laegaardiana, a new species from Ecuador (Poaceae, Pooideae, Poeae, Poinae)

Cited by 4 publications

References 9 publications

New species and new record of the genus Poa L. (Poaceae, Pooideae, Poeae) from India

New species and new record of the genus Poa L. (Poaceae, Pooideae, Poeae) from India

Resolving páramoPoa(Poaceae): morphometric and phylogenetic analysis of the ‘Cucullatacomplex’ of north-west South America

Poa (Poaceae) of Colombia: A Taxonomic Revision

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