Bromus racemosus |
Bromus sterilis |
|
---|---|---|
bald brome, brome a grappes, smooth brome |
barren brome, barren bromegrass, poverty brome, sterile brome |
|
Habit | Plants annual. | Plants annual. |
Culms | 20-110 cm, erect or ascending. |
35-100 cm, erect or geniculate near the base, glabrous. |
Sheaths | densely pubescent; auricles absent; ligules 2-2.5 mm, glabrous, acute, lacerate; blades 4-20 cm long, 1-6 mm wide, pubescent on both surfaces. |
|
Panicles | 4-16 cm long, 2-3 cm wide, erect, open; branches sometimes longer than the spikelets, slender, usually ascending, slightly curved or straight. |
10-20 cm long, 5-12 cm wide, open; branches 2-10 cm, spreading, ascending or drooping, rarely with more than 3 spikelets. |
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. |
20-35 mm, usually shorter than the panicle branches, sides parallel or diverging distally, moderately laterally compressed, with 5-9 florets. |
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. |
smooth or scabrous, margins hyaline; lower glumes 6-14 mm, 1(3)-veined; upper glumes 10-20 mm, 3(5)-veined; lemmas 14-20 mm, narrowly lanceolate, pubescent or puberulent, 7(9)-veined, rounded over the midvein, margins hyaline, apices acuminate, bifid, teeth 1-3 mm; awns 15-30 mm, straight, arising 1.5 mm or more below the lemma apices; anthers 1-1.4 mm. |
Caryopses | 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. |
|
2n | = 28. |
= 14,28. |
Bromus racemosus |
Bromus sterilis |
|
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
|
AL; AR; AZ; CA; CO; CT; DC; DE; ID; IL; IN; KY; MA; MD; MI; MO; MS; NC; NJ; NM; NV; NY; OH; OK; OR; PA; RI; TN; TX; UT; VA; WA; WV; HI; BC; ON
|
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 sterilis is native to Europe, growing from Sweden southward. In the Flora region, it grows in road verges, waste places, fields, and overgrazed rangeland. It is widespread in western and eastern North America, but is mostly absent from the Great Plains and the southeastern states. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 24, p. 233. | FNA vol. 24, p. 224. |
Parent taxa | Poaceae > subfam. Pooideae > tribe Bromeae > Bromus > sect. Bromus | Poaceae > subfam. Pooideae > tribe Bromeae > Bromus > sect. Genea |
Sibling taxa | ||
Synonyms | Anisantha sterilis | |
Name authority | L. | L |
Web links |
|
|