Bromus catharticus |
Bromus berteroanus |
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rescue brome, rescue grass, rescuegras |
Chilean chess |
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Habit | Plants annual, biennial, or perennial; loosely cespitose or tufted. | Plants annual; often tufted. | ||||
Culms | 30-120 cm tall, 2-4 mm thick, erect or decumbent. |
30-60 cm, slender. |
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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. |
pilose-pubescent to nearly glabrous; blades 7-28 cm long, 2-9 mm wide, pilose or glabrous. |
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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. |
10-20 cm long, 3-9 cm wide, erect, dense; branches appressed to spreading, sometimes flexuous. |
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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. |
15-20 mm, elliptic to lanceolate, more or less terete, with 3-9 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, acuminate; lower glumes 8-10 mm, 1-veined; upper glumes 12-16 mm, 3(5)-veined; lemmas 11-14 mm, lanceolate to linear-lanceolate, sparsely pubescent, 5-veined, rounded over the midvein, apices acuminate, bifid, teeth 2-3 mm, usually aristate, sometimes acuminate; awns 13-20 mm, geniculate, strongly to moderately twisted in the basal portion, arising 1.5 mm or more below the lemma apices; anthers 2-2.5 mm. |
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2n | = 42. |
= unknown. |
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Bromus catharticus |
Bromus berteroanus |
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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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AZ; CA; NV; OR; UT
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Discussion | Bromus berteroanus is from Chile, and can now be found in dry areas in western North America, including British Columbia, Montana, California, Nevada, Arizona, southwestern Utah, and Baja California, Mexico. (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. 224. | ||||
Parent taxa | Poaceae > subfam. Pooideae > tribe Bromeae > Bromus > sect. Ceratochloa | Poaceae > subfam. Pooideae > tribe Bromeae > Bromus > sect. Neobromus | ||||
Sibling taxa | ||||||
Subordinate taxa | ||||||
Synonyms | Ceratochloa unioloides, B. willdenowii, B. unioloides | B. trinii var. excelsus, B. trinii | ||||
Name authority | Vahl | Colla | ||||
Web links |
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