Bromus racemosus |
Bromus lanceolatus |
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bald brome, brome a grappes, smooth brome |
lanceolate brome, Mediterranean brome |
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Habit | Plants annual. | Plants annual. |
Culms | 20-110 cm, erect or ascending. |
30-70 cm, erect or ascending. |
Sheaths | often densely hairy with soft, white hairs; ligules 1-2 mm, hairy, obtuse, erose; blades 10-30 cm long, 3-5 mm wide, glabrous or pubescent. |
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Panicles | 4-16 cm long, 2-3 cm wide, erect, open; branches sometimes longer than the spikelets, slender, usually ascending, slightly curved or straight. |
5-15 cm long, 2-9 cm wide, erect, densely contracted when immature, more open with age; branches usually shorter than the spikelets, rigid, ascending to slightly spreading, slightly curved or straight. |
Spikelets | 12-20 mm, lanceolate, terete to moderately laterally compressed; florets 5-6, bases concealed at maturity; rachilla internodes 1-1.5 mm, concealed at maturity. |
20-50 mm, lanceolate, terete to moderately laterally compressed, often 2+ per node; florets 7-20, bases concealed at maturity; rachilla internodes concealed at maturity. |
Glumes | smooth to scabrous; lower glumes 4-6 mm, (3)5-veined; upper glumes 4-7 mm, 7-veined; lemmas 6.5-8 mm long, 3-4.5 mm wide, elliptic to lanceolate, coriaceous, backs smooth, distinctly 7(9)-veined, not ribbed, rounded over the midvein, margins scabrous, rounded, not inrolled at maturity, apices acute to obtuse, bifid, teeth shorter than 1 mm; awns 5-9 mm, all more or less equal in length, straight, arising less than 1.5 mm below the lemma apices; anthers 1.5-3 mm. |
pilose; lower glumes 5-9 mm, 3-5-veined: upper glumes 8-12 mm, 5-7-veined; lemmas 11-20 mm long, 1.8-2.5 mm wide, lanceolate, pilose, obscurely 7-veined, rounded over the midvein, margins rounded, not inrolled at maturity, apices acute, bifid, teeth shorter than 1 mm; awns 6-12 mm, to 20 mm on some distal lemmas, divaricate when mature, arising 1.5 mm or more below the lemma apices; anthers 1-1.5 mm. |
Caryopses | shorter than the paleas, thin, weakly inrolled or flat. |
equaling or slightly shorter than the paleas, thin, weakly inrolled or flat. |
Lower | sheaths densely hairy, hairs stiff, often retrorse; upper sheaths glabrous or pubescent; ligules 1-2 mm, glabrous or hairy, erose; blades 7-18 cm long, 1-4 mm wide, pilose on both surfaces. |
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2n | = 28. |
= 28, 42. |
Bromus racemosus |
Bromus lanceolatus |
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Distribution |
AK; AL; AR; AZ; CA; CO; CT; DC; DE; FL; GA; IA; ID; IL; IN; KS; KY; LA; MA; MD; ME; MI; MO; MS; MT; NC; ND; NE; NH; NJ; NM; NV; NY; OH; OK; OR; PA; RI; SC; TN; TX; UT; VA; VT; WA; WI; WV; WY; AB; BC; LB; NB; NS; NT; ON; PE; QC; SK
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DC; LA; NY; TX; AB |
Discussion | Bromus racemosus grows in fields, waste places, and road verges. It is native to western Europe and the Baltic region, and occurs throughout much of southern Canada and the United States. Hitchcock (1951) included B. hordeaceus subsp. pseudothominei in B. racemosus. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Bromus lanceolatus grows in waste places, and is also cultivated as an ornamental. It has been introduced to the Flora region from southern Europe, and is reported from scattered sites, e.g., Yonkers, New York (wool waste); College Station, Texas; and Pima County, Arizona. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 24, p. 233. | FNA vol. 24, p. 235. |
Parent taxa | Poaceae > subfam. Pooideae > tribe Bromeae > Bromus > sect. Bromus | Poaceae > subfam. Pooideae > tribe Bromeae > Bromus > sect. Bromus |
Sibling taxa | ||
Synonyms | B. macrostachys | |
Name authority | L. | Roth |
Web links |
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