Participant Info

Species

Poa abbreviata [Poa abbreviata var marshii] [Poa abbreviata subsp. jordalii] [Poa pattersonii]

Family

Poaceae

CommonName

Patterson bluegrass

Presence

yes

Status

native

EarliestDate

1983

LatestDate

2023

Ecosystem

subalpine, tundra

Geobotanical

Garitas, SSanjuans, NCristos

Counties

Alamosa, Conejos, Costilla, Hinsdale, Mineral, Rio Grande, Saguache

Passes

Grayback

WildlifePreserves

Other Localities

PhotoRecords

Comments

NEED IN SITU PHOTOS. Patterson bluegrass usually grows in the tundra, often in the melt of snow beds. In the Watershed, Poa abbreviata has been vouchered, for instance, from the slopes of California Peak (Alamosa Co, 1999), Kit Carson Peak (Saguache Co, 1999), and Methodist Mountain (Saguache Co, 1999)—all in the north Cristos; and from Bowers Peak (Saguache Co, 2004), Bonito Mountain (Rio Grande Co, 2023), Grayback Mountain, and Osier Mountain (Conejos Co, 2004)—all in the eastern San Juans. In the USA, Poa abbreviata, perennial and cool-season, has been recorded from all Westerns states save Arizona and New Mexico, although it is rare in the Pacific Coast and Great Basin states. The Watershed occurrences are the only ones in the Rio Grande drainage. Note that the evidence of P. abbreviata from Costilla Co comes from Shaw (2008). Ackerfield 2022 treats P. abbreviata as ap. pattersonii.

Annotation