Saxipoa and Sylvipoa - two new genera and a new classification for Australian Poa (Poaceae: Poinae)

Abstract

Thirty-three of these species, plus six species of New Zealand Poa, are placed in a new P. subsect.

Taxonomy of Poa jubata and a new section of the genus (Poaceae)

“…Fortytwo species of Poa, including two samples of P. jubata and two subspecies of P. trivialis, were chosen to represent all subgenera of Poa (classification following Gillespie et al, 2007;Soreng et al, 2009Soreng et al, , 2010Soreng et al, , 2015aRefulio et al, 2012;Peterson and Soreng, 2016). The Poa species included in our study represent selections from all 10 plastid and 11 nrDNA genotype groups previously identified , including the x-clade .…”

Phylogenetic relationships of Australian Poa (Poaceae: Poinae), including molecular evidence for two new genera, Saxipoa and Sylvipoa

“…In this case, the DNA data provided the critical evidence that this taxon did not belong within Poa. Saxipoa is most similar to the Australian genus Hookerochloa, sharing several morphological characters, including densely pubescent rachillas and sheath margins fused only at base (discussed in Soreng et al 2009). Saxipoa resolved as the sister to the AQN subclade with moderate support, but also shares some DNA sequence characteristics with Hookerochloa, including a 20-bp insertion in TLF sequences.…”

“…DNA variation within supersection Homalopoa was insufficient to resolve what group might be sister to this Australasian section. Soreng et al (2009) placed most Poa section Brizoides species within the following four subsections: Australopoa (with 35 spp. in Australia, six in New Zealand, and possibly one in New Guinea), Austrofestuca (2 spp.…”

“…The relationships of the majority of these species are poorly known and, up to now, very few have been placed in infrageneric classifications of the genus (Tzvelev 1976;Edmondson 1980;Soreng 1998Soreng et al 2003;Gillespie and Soreng 2005;Zhu et al 2006;Gillespie et al 2007Soreng and Gillespie 2007). Soreng et al (2009) provided a review of the taxonomic history of the Australian Poa species.…”

Taxonomic description and annotation of Poa albertii Regel (Poaceae: Pooideae, Poeae, Poinae) from North Western Himalayas, India.

“…Despite difficulties mentioned in the preceding part, Poa has attracted the attention of several agrostologists including Bor (1970) (29) with the species number given in the parenthesis. More recently, Soreng and Peterson (2012), provided a revisionary account of the genus from Mexico with new reports resulting from latest delimitation of species within the genus.…”