Taxon  Report   143 
Agrostis exarata  Trin.
Spike bentgrass,  Spike redtop
Agrostis exarata
© 2008 Keir Morse
More photos from
CalPhotos / Calflora
Agrostis exarata
© 2008 Keir Morse
Agrostis exarata
© 2009 Zoya Akulova
Agrostis exarata, a monocot, is a perennial grass that is native to California, is also found elsewhere in North America and beyond.

Interactive Distribution Map

Observation Hotline
(observation details + photos)

point, line, or polygon

Plant Characteristics
and Associations

Bloom Period
Agrostis exarata
© 2008 Keir Morse
Family: POACEAE  
Genus: Agrostis
North Coastal Coniferous Forest, Closed-cone Pine Forest, Redwood Forest, Yellow Pine Forest, Red Fir Forest, Lodgepole Forest, Subalpine Forest, Mixed Evergreen Forest, Foothill Woodland, Chaparral, Valley Grassland, (many plant communities), wetland-riparian
Wetlands: Occurs usually in wetlands, occasionally in non wetlands
Name Status:
Accepted by JEF + PLANTS + JM93
Alternate Names:
(according to)

PLANTS: Agrostis aenea
PLANTS: Agrostis melaleuca
PLANTS: Agrostis longiligula
PLANTS: Agrostis exarata var. purpurascens
PLANTS: Agrostis exarata var. pacifica
PLANTS: Agrostis microphylla var. major
PLANTS: Agrostis exarata var. minor
PLANTS: Agrostis exarata ssp. minor
PLANTS: Agrostis asperifolia
PLANTS: Agrostis alaskana
ICPN + PLANTS: Agrostis longiligula var. australis
ICPN + PLANTS: Agrostis ampla
ICPN + PLANTS: Agrostis exarata var. monolepis
ICPN: Agrostis exarata var. exarata
More information about  Agrostis exarata
Nursery / seed vendor availability from CNPLX
This plant is available commercially.
Landscaping information from Calscape
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]. 2018. Berkeley, California: The Calflora Database [a non-profit organization].
Available:   (Accessed: Sep 20, 2018).

The information on this page comes from diverse sources. None of the links are sponsored.