Bromus carinatus Hook. & Arn.

Family: Poaceae, Tribe: Bromeae

Pertinent Synonyms & Notes (particularly those used in California; go to GRIN for other synonyms)

only var. marginatus (Nees) Barkwork & Anderton occurs in the table grape region

Bromus marginatus Steud.

Pertinent Common Names (particularly those used in California; go to GRIN for other common names)

mountain brome

Primary Disseminule Type


Description (diagnostics are in brown)

Spikelets solitary, pedicelled, consisting of 6–9 fertile florets with similar-looking though diminished sterile florets at apex, ovate, strongly laterally compressed, 25–40 mm long, disarticulating below each fertile floret at maturity.

Glumes persistent, similar, lanceolate, shorter than spikelet, chartaceous, keeled, apices acuminate. Lower glume 7–9 mm long, 0.9 length of upper glume, 3–7(9)-veined. Upper glume 9–11 mm long, 0.8–0.9 length of adjacent fertile lemma, 5–7-veined.

Fertile florets: rachilla persistent, relatively long, pubescent, callus pubescent, blunt to sharply pointed.

Lemma oblong to lanceolate, 11–14(17) mm long (excluding awn), chartaceous, much thinner on margins, keeled, 7–9-veined, midvein and lateral veins ribbed, surface glabrous or pubescent, apex entire, awn subapical, 4–7 mm long (var. marginatus).

Palea 0.8 length of lemma, keels ciliolate.

Caryopsis oblanceolate, ca. 7 mm long x ca. 1.5 mm wide, brown (sometimes purplish), apex fleshy, hilum linear, same length as caryopsis.

Similar Species

Similar Species Comparison Chart

Risk Assessment (codes in yellow or red indicate cause for concern; assessments are current as of mid-2011; click AUQP, NZBORIC, or NZBPI for access to the most recent versions of these databases and possible assessment changes)