Taxon  Report   143 
Agrostis exarata  Trin.
Spike bentgrass,  Spike redtop
Agrostis exarata
© 2008 Keir Morse
Click on a photo to see it bigger.
Agrostis exarata
© 2008 Keir Morse
Agrostis exarata
© 2009 Zoya Akulova
Agrostis exarata, a monocot, is a perennial grass that is native to California and 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 TJM2 + 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
TJM2 + PLANTS: Agrostis longiligula var. australis
TJM2 + PLANTS: Agrostis ampla
TJM2 + PLANTS: Agrostis exarata var. monolepis
More information about  Agrostis exarata
Nursery / seed vendor availability from CNPLX
This plant is available commercially.
Landscaping information from Calscape
Photos on CalPhotos / Google Images
Jepson eFlora

Records from the Consortium of California Herbaria

Original Publication citation (ITIS)


Search the International Plants Names Index

Search (Flora of North America)

Search the Lady Bird Johnson Wildflower Center

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: Jan 20, 2018).

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