Taxon  Report   164    
Aira praecox  L.
Yellow hairgrass
Aira praecox
© 2010 National Park Service
Photos from
CalPhotos / Calflora
Aira praecox
© 2009 Zoya Akulova
Aira praecox
© 2010 National Park Service
Aira praecox, a monocot, is an annual grass that is not native to California; it was introduced from elsewhere and naturalized in the wild.

Interactive Distribution Map

Observation Hotline
(observation details)

point, line, or polygon

one or more occurrences
within a 7.5-minute quadrangle

Plant Characteristics
and Associations

Bloom Period
Aira praecox
© 2018 Ken Hickman
Family: POACEAE  
Genus: Aira
Name Status:
Accepted by JEF + PLANTS

Alternate Names:
PLANTS: Aspris praecox
More information about  Aira praecox
Photos on Google Images
Jepson eFlora

Records from the Consortium of California Herbaria

ITIS Original Publication citation


Search the International Plants Names Index

Search (Flora of North America)

website references from Google

Suggested Citation
Calflora: Information on California plants for education, research and conservation, with data contributed by public and private institutions and individuals, including the Consortium of California Herbaria. [web application]. 2019. Berkeley, California: The Calflora Database [a non-profit organization]. Available:   (Accessed: Jan 21, 2019).