Regularity: Regularly occurring
Regularity: Regularly occurring
Global Range: Kartesz (1999) indicates that this species is native within his geographic scope and occurs in Arizona, California, Nevada, and Texas.
Hickman (1993) and Kearney and Peebles (1960) say that this species is also established in Baja California.
Catalog Number: US 81568
Collection: Smithsonian Institution, National Museum of Natural History, Department of Botany
Preparation: Pressed specimen
Collector(s): C. G. Pringle
Year Collected: 1884
Locality: Santa Cruz Valley, Tucson., Pima, Arizona, United States, North America
- Holotype: Shear, C. L. 1900. U.S.D.A. Div. Agrostol. Bull. 23: 62.
National NatureServe Conservation Status
Rounded National Status Rank: NNR - Unranked
Rounded National Status Rank: N3 - Vulnerable
NatureServe Conservation Status
Rounded Global Status Rank: G3 - Vulnerable
Reasons: Kartesz (1999) indicates that this species is native within his geographic scope and occurs in Arizona, California, Nevada, and Texas. It occurs in fifteen counties in California, one southern county in Nevada, and eleven counties in Arizona (Kartesz 2003 draft). Hitchcock (1951) mentions that this plant occurs in western Texas, from Arizona to middle California and Baja California. Hickman (1993), Kartesz (1988) and Kearney and Peebles (1960) also state that this species is established in Baja California.
In California, this species inhabits open places, grasslands, and scrub < 1000 m in California, specifically in San Joaquin Valley, southern South Coast Ranges, South Coast, Channel Islands, and Desert (Hickman 1993). Munz (1959) indicates that this species inhabits dry open places, mostly below 2000 ft. in California from Yolo and Fresno counties to San Diego county, to Arizona, lower California, Santa Barbara Islands. It is specifically found in valley grasslands, foothill woodlands, chaparral, coastal sage scrub, and creosote bush scrub. David L. Magney included this plant in his checklist of Ventura County Rare Plants, which was updated on March 1, 2004. It is probably just locally rare there.
In Arizona, it is "almost throughout the state, at moderate elevations" (Kearney and Peebles 1960). Reported in Mohave, Yavapai, Coconino, and Apache counties, mostly below 5000 feet, but sometimes as high as 9500 feet (Dittmann 2004).
In Nevada, it is rare and known from the Riverside Bridge, south end of the Birgin Mountains, Newberry Mountains, below State Highway 77, Clark County. It inhabits hillsides and sandy washes, roadsides and disturbed areas in the deserts, with Juncus and Tessaria, 2300-5000 ft (Kartesz 1988).
In Texas, it is native and occurs only in the western part of the state, in the Trans-Pecos vegetational area (Hatch et al. 1990). Hitchcock (1951) mentions that it occurs on open, mostly arid slopes and valleys, in western Texas.
Bromus arizonicus is a species of brome grass known by the common name Arizona brome.
It is native to the Southwestern United States, California, and Baja California, where it grows in many types of grassy valley and desert habitat. It is an annual grass growing 40 to 90 centimeters tall with an open, branching inflorescence. The spikelets are flat and hairy and have awns up to 1.5 centimeters long.
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