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Australian Systematic Botany Australian Systematic Botany Society
Taxonomy, biogeography and evolution of plants
RESEARCH ARTICLE

Infrageneric treatment of Phalaris (Canary grasses, Poaceae) based on molecular phylogenetics and floret structure

Stephanie M. Voshell A C , Riccardo M. Baldini B and Khidir W. Hilu A
+ Author Affiliations
- Author Affiliations

A Department of Biological Sciences, Virginia Tech, Blacksburg, VA 24061, USA.

B Dipartimento di Biologia, Università degli Studi di Firenze, Florence, I-50121, Italy.

C Corresponding author. Email: svoshell@vt.edu

Australian Systematic Botany 28(6) 355-367 https://doi.org/10.1071/SB15025
Submitted: 30 May 2015  Accepted: 16 February 2016   Published: 10 May 2016

Abstract

Phalaris L. (Poaceae, canary grasses) is a genus of 20 species found throughout the world with endemic, cosmopolitan, invasive and forage species. A variety of features in the genus underscore its importance for the study of polyploid evolution in relation to biodiversity, ecological niche expansion or contraction, endemism, and invasiveness. A formal and comprehensive infrageneric classification for Phalaris is lacking. This study utilises molecular phylogenetics (nuclear ITS and plastid trnT–F regions), morphological features (primarily floret structure) and chromosome cytology to present the first comprehensive taxonomic classification for the genus. Two subgenera (Phalaris and Phalaroides) and five sections (Phalaris, Phalaroides, Caroliniana, Bulbophalaris, Heterachne) are established here to accommodate the 20 Phalaris species. Keys to the subgenera and sections, morphological descriptions, and a list of synonymy are provided.


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