English   español  
Please use this identifier to cite or link to this item: http://hdl.handle.net/10261/49459
logo share SHARE   Add this article to your Mendeley library MendeleyBASE
Visualizar otros formatos: MARC | Dublin Core | RDF | ORE | MODS | METS | DIDL
Exportar a otros formatos:

Phylogenetics of Piptatherum s.l. (Poaceae: Stipeae): Evidence for a new genus, Piptatheropsis, and resurrection of Patis.

AuthorsRomaschenko, Kostyantyn; Peterson, Paul M.; Soreng, Robert J.; Futorna, Oksana; Susanna de la Serna, Alfonso
lemma micromorphology
plastid DNA sequences
Issue DateDec-2011
PublisherInternational Association for Plant Taxonomy
CitationTaxon 60(6):1703-1716 (2011)
Abstract[EN]Historically, there has been taxonomic confusion among agrostologists regarding the short-spikeleted Stipeae. We refer to these as the Oryzopsis/Piptatherum complex which consists of short-spikeleted species with coriaceous to cartilaginous and often caducous-awned lemmas, and florets with a blunt callus. We conducted a phylogenetic analysis of 53 species that have been associated with this complex using four plastid regions (ndhF, rpl32-trnL, rps16-trnK, rps16 intron) in combination with lemma micromorphology to infer evolutionary relationships. Piptatherum as currently circumscribed is polyphyletic and is found in five strongly supported clades in our maximum likelihood tree. Based on our phylogenetic and morphological evidence we recognize a Eurasian Piptatherum s.str., propose a new genus, Piptatheropsis, to include five North American species, and resurrect the genus Patis to include three species, two from Eurasia and one from North America. We provide morphological descriptions of Patis, Piptatherum, and Piptatheropsis, and provide keys to the genera and species of the Oryzopsis/Piptatherum complex. The following new combinations are made: Patis obtusa, Patis racemosa, Piptatheropsis canadensis, Piptatheropsis exigua, Piptatheropsis micrantha, Piptatheropsis pungens, Piptatheropsis shoshoneana, Piptatherum brachycladum, and Piptatherum kopetdagense.
Description14p. Tablas, fotografías b/n, apéndice.
Publisher version (URL)http://www.ingentaconnect.com/content/iapt/tax/2011/00000060/00000006/art00015
Appears in Collections:(IBB) Artículos
Files in This Item:
File Description SizeFormat 
Romaschenko_Piptatherum.pdf565,94 kBAdobe PDFThumbnail
Show full item record
Review this work

WARNING: Items in Digital.CSIC are protected by copyright, with all rights reserved, unless otherwise indicated.