Bromus racemosus |
Bromus arenarius |
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bald brome, brome a grappes, smooth brome |
Australian brome, Australian chess |
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Habit | Plants annual. | Plants annual. |
Culms | 20-110 cm, erect or ascending. |
20-40 cm, erect to ascending. |
Sheaths | densely retorsely pilose; ligules 1.5-2.5 mm, glabrous or pilose, obtuse, lacerate; blades 7-8 cm long, 3-6 mm wide, pilose on both surfaces. |
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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. |
(4)10-15 cm long, 4-7 cm wide, open, nodding; branches sometimes longer than the spikelets, spreading or ascending, sinuous. |
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. |
10-20 mm, lanceolate, terete to moderately laterally compressed; florets 5-9(11), 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. |
densely pilose; lower glumes 7-10 mm, 3-veined; upper glumes 8-12 mm, (5)7-veined; lemmas 9-11(13) mm long, 1-1.8 mm wide, lanceolate, densely pilose, distinctly 7-veined, rounded over the midvein, margins rounded, not inrolled at maturity, apices acute, bifid, teeth shorter than 1 mm; awns 10-16 mm, straight to weakly spreading, arising 1.5 mm or more below the lemma apices; anthers 0.7-1 mm. |
Caryopses | shorter than the paleas, thin, weakly inrolled or flat. |
equaling or shorter than the paleas, thin, weakly inrolled. |
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. |
= unknown. |
Bromus racemosus |
Bromus arenarius |
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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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AZ; CA; NV; OR; PA
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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 arenarius grows in dry, often sandy slopes, fields, and waste places. Native to Australia, it is now widely scattered throughout California, and is also recorded from Oregon, eastern Nevada, Arizona, New Mexico, Texas, and Pennsylvania. (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 | ||
Name authority | L. | Labill. |
Web links |
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