Bromus catharticus |
Bromus carinatus |
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rescue brome, rescue grass, rescuegras |
California brome, mountain brome |
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Habit | Plants annual, biennial, or perennial; loosely cespitose or tufted. | Plants annual, biennial, or perennial; loosely cespitose. | ||||||||
Culms | 30-120 cm tall, 2-4 mm thick, erect or decumbent. |
45-120(180) cm tall, usually less than 3 mm thick, erect. |
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Sheaths | usually densely, often retrorsely, hairy, hairs sometimes confined to the throat; auricles absent; ligules 1-4 mm, glabrous or pilose, obtuse, lacerate to erose; blades 4-30 cm long, 3-10 mm wide, flat, glabrous or hairy on both surfaces. |
mostly glabrous or retrorsely soft pilose, throats usually hairy; auricles sometimes present on the lower leaves; ligules 1-3.5(4) mm, glabrous or sparsely hairy, acute to obtuse, lacerate or erose; blades 8-30 cm long, 1-12 mm wide, flat or becoming involute, glabrous or sparsely pilose to pubescent on 1 or both surfaces. |
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Panicles | 9-28 cm, usually open, erect or nodding; lower branches shorter than 10 cm, 1-4 per node, spreading or ascending, with up to 5 spikelets variously distributed. |
5-40 cm, lax, open or erect; lower branches usually shorter than 10 cm, 1-4 per node, ascending to strongly divergent or reflexed, with 1-4 spikelets variously distributed. |
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Spikelets | (17)20-40 mm, shorter than at least some pedicels and branches, elliptic to lanceolate, strongly laterally compressed, not crowded or overlapping, with 4-12 florets. |
20-40 mm, shorter than at least some pedicels and branches, elliptic to lanceolate, strongly laterally compressed, not crowded or overlapping, sometimes purplish, with 4-11 florets. |
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Glumes | smooth or scabrous, glabrous or pubescent; lower glumes 7-12 mm, 5-7(9)-veined; upper glumes 9-17 mm, 7-9(11)-veined, shorter than the lowest lemma; lemmas 11-20 mm, lanceolate, laterally compressed, strongly keeled, usually glabrous, sometimes pubescent distally, smooth or scabrous, 9-13-veined, veins often raised and riblike, margins sometimes conspicuous, hyaline, whitish or partly purplish, apices entire or toothed, teeth acute, shorter than 1 mm; awns absent or to 10 mm; anthers 0.5-1 mm in cleistogamous florets, 2-5 mm in chasmogamous florets. |
glabrous or pubescent; lower glumes 7-11 mm, 3-7(9)-veined; upper glumes 9-13 mm, shorter than the lowest lemma, 5-9(11)-veined; lemmas 10-16(17) mm, lanceolate, laterally compressed, strongly keeled distally, usually more or less uniformly pubescent or pubescent on the margins only, sometimes glabrous or scabrous, 7-9-veined, veins usually not raised or riblike, apices entire or with acute teeth shorter than 1 mm; awns 4-17 mm, sometimes slightly geniculate; anthers 1-6 mm. |
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2n | = 42. |
= 28, 42, 56. |
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Bromus catharticus |
Bromus carinatus |
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Distribution |
AL; AR; AZ; CA; CO; DC; FL; GA; IA; IL; KS; KY; LA; MD; MO; MS; NC; ND; NE; NJ; NM; NV; NY; OH; OK; OR; PA; SC; SD; TN; TX; UT; VA; HI; AB; NF; ON
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AK; CA; CO; KS; NM; OR; WA; AB; BC; ON; YT
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Discussion | Bromus carinatus is native from British Columbia to Saskatchewan and south to Mexico. It has been introduced to various more eastern locations and to the southern Yukon Territory. The two varieties recognized here are sometimes recognized as species. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
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Key |
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Source | FNA vol. 24, p. 199. | FNA vol. 24, p. 203. | ||||||||
Parent taxa | Poaceae > subfam. Pooideae > tribe Bromeae > Bromus > sect. Ceratochloa | Poaceae > subfam. Pooideae > tribe Bromeae > Bromus > sect. Ceratochloa | ||||||||
Sibling taxa | ||||||||||
Subordinate taxa | ||||||||||
Synonyms | Ceratochloa unioloides, B. willdenowii, B. unioloides | Ceratochloa carinata | ||||||||
Name authority | Vahl | Hook. & Arn. | ||||||||
Web links |
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