Poa secunda J. Presl, Reliq. Haenk. 1(4-5): 271, 1830

Soreng, Robert John & Gillespie, Lynn J., 2018, Poa secunda J. Presl (Poaceae): a modern summary of infraspecific taxonomy, chromosome numbers, related species and infrageneric placement based on DNA, PhytoKeys 110, pp. 101-121 : 110

Poa secunda J. Presl, Reliq. Haenk. 1(4-5): 271, 1830

Range.

CANADA: Alberta, British Columbia, Manitoba (sw), Northwest Territories (sw), Ontario (Manitoulin Island), Quebec (Gaspe Peninsula), Saskatchewan, Yukon (s). UNITED STATES: Alaska (se interior border), Arizona (n), California, Colorado, Idaho, Montana, North Dakota, Nevada, New Mexico (n), Oregon, South Dakota (w), Utah, Washington, Wyoming, with outlying populations in Nebraska (w), Oklahoma (panhandle), Michigan (Isle Royal) and sporadic in Illinois and Maine, Massachusetts.

The geographic range of P. secunda in North America north of Mexico is mapped in Fig. 2 . Subspecies secunda occurs throughout the species range and also reaches into Baja California Norte, Mexico (Fig. 2A ). The range of subspecies juncifolia is almost completely within that of subsp. secunda, except for several scattered localities in Arizona, New Mexico and Nebraska; it is absent from Mexico and mostly absent from the Pacific Coast and coastal mountains (Fig. 2B ). The ranges of varieties are broadly overlapping within their subspecies. Both subspecies have disjunct populations in the Patagonian Andes of Argentina and Chile.

Figures

Figure 2. Distribution of Poa secunda subspecies in North America: subsp. secunda (yellow); subsp. juncifolia (blue).