Taxon  Report   1200 
Bromus diandrus  Roth
Bromegrass,  Ripgut brome, Ripgut grass
Bromus diandrus
© 2008 Zoya Akulova
Click on a photo to see it bigger.
Bromus diandrus
© 2004 Carol W. Witham
Bromus diandrus
© 1995 Saint Mary's College of California
Bromus diandrus, a monocot, is an annual grass that is not native to California; it was introduced from elsewhere and naturalized in the wild.
It is an invasive plant. The California Invasive Plant Council classifies its potential impact on native ecosystems as moderate (plant profile / CalWeedMapper).

Interactive Distribution Map

Observation Hotline
(observation details + photos)

point, line, or polygon

one or more occurrences
within a 7.5-minute quadrangle

Plant Characteristics
and Associations

Bloom Period
Bromus diandrus
© 2009 Neal Kramer
Family: POACEAE  
Genus: Bromus
weed, characteristic of disturbed places
Habitat: disturbed [Walker]
Name Status:
Accepted by TJM2 + PLANTS + JM93
Alternate Names:
(according to)

TJM2: Bromus diandrus var. rigidus
TJM2: Bromus rigidus
More information about  Bromus diandrus
Photos on CalPhotos / Google Images
Photos and ID tips from

UC Integrated Pest Management Weed Photo Gallery
(profile of this plant as an agricultural weed)

Jepson eFlora

Records from the Consortium of California Herbaria

Original Publication citation (ITIS)


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]. 2016. Berkeley, California: The Calflora Database [a non-profit organization].
Available:   (Accessed: Oct 21, 2016).

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