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ripgut brome
Scientific Name: Bromus diandrus ssp. diandrus
Family: Poaceae
Category: Monocot
Growth: Graminoid
Duration: Annual, Perennial
Other Names:
Great Brome (Bromus diandrus)
Bromus diandrus, commonly known as great brome or ripgut brome, is an annual grass species.
Considerations for Pets
- The long, stiff awns (bristles) of mature ripgut brome seeds can cause injury, potentially affecting eyes or becoming lodged in fur.
- Seeds can contaminate wool, pelts, and carcasses of animals.
Taxonomy and Nomenclature
- Scientific Name: Bromus diandrus Roth
- Common Names: Great brome, Ripgut brome, Ripgut grass, Giant brome
- Family: Poaceae (Grass family), also known as Gramineae
- Synonyms: Bromus rigidus Roth, Anisantha rigida, Bromus maximus, Bromus rigidus var. gussonii, Bromus villosus, Anisantha rigidus. (Roth.)Hyl., Anisantha diandra subsp. rigida (Roth) Tzvelev
- Subspecies: Bromus diandrus ssp. rigidus (Roth) Sales
Distribution and Habitat
- Native to the Mediterranean region, Europe, northern Africa, and western Asia.
- Widely introduced in other parts of the world.
- Common along roadsides and in waste places, particularly west of the Cascade Mountains in Oregon.
- Frequently infests coastal dunes and grasslands.
- Prevalent in dry, hill, and high country regions, such as in the South Island.
Ecological Role
- It is one of many European annual grass species that has displaced a large portion of native grasslands.
- Considered an exotic and invasive species in some regions.
Morphological Characteristics
- Annual grass that typically grows to a height of 6 to 31 inches (15-80 centimeters).
- Loosely cespitose or tufted growth habit.
- Does not have creeping stolons.
- Has a fibrous rooting system.
- Leaves are generally soft-hairy, with blades measuring 0.07-0.27 inches (2-7 mm) wide.
- Produces many seeds with a short lifespan of 1-2 years.
Other Interesting Points
- Ripgut brome exhibits a quantitative response to vernalization (cold treatment) in relation to flowering.
Further Information
- USDA PLANTS Database: Symbol BRDIR
- CalPhotos (Zoya Akulova): Provides images of Bromus diandrus.