Bromus hordeaceus |
Bromus nottowayanus |
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brome mou, lesser soft brome, lopgrass, soft brome, soft chess |
glossy-leaf brome, Nottoway Valley brome, satin brome, Virginia brome |
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Habit | Plants annual or biennial. | Plants perennial; not rhizomatous. | ||||||||||||
Culms | 2-70 cm, erect or ascending. |
(60)70-140 cm, erect or spreading; nodes 5-9, pubescent or glabrous, often concealed by the sheaths; internodes usually glabrous. |
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Sheaths | usually retrorsely pilose, sometimes glabrous, with a dense line of hairs at the collar, lower sheaths often sericeous; auricles absent; ligules 0.4-1 mm, often hairy, truncate, erose, ciliolate; blades 15-30 cm long, 5-12 mm wide, often shiny yellow-green, flat, abaxial surfaces pilose, adaxial surfaces glabrous or pilose over the veins. |
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Panicles | 1-13 cm long, 1-4 cm wide, erect, usually ovoid, open, becoming dense, occasionally reduced to 1 or 2 spikelets; branches shorter than the spikelets, ascending to erect, straight or almost so. |
9-25 cm, open, nodding; branches ascending or spreading, often recurved. |
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Spikelets | (11)14-20(23) mm, lanceolate, terete to moderately laterally compressed; florets 5-10, bases concealed at maturity; rachilla internodes concealed at maturity. |
18-30 mm, elliptic to lanceolate, terete to moderately laterally compressed, often purplish, with 6-12 florets. |
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Glumes | pilose or glabrous; lower glumes 5-7 mm, 3-5-veined; upper glumes 6.5-8 mm, 5-7-veined; lemmas 6.5-11 mm long, 3-5 mm wide, lanceolate, chartaceous, antrorsely pilose to pubescent, or glabrous proximally or throughout, 7-9-veined, lateral veins prominently ribbed, rounded over the midvein, hyaline margins abruptly or bluntly angled, not inrolled at maturity, apices acute, bifid, teeth shorter than 1 mm; awns 6-8 mm, usually arising less than 1.5 mm below the lemma apices, straight to recurved at maturity; anthers 0.6-1.5 mm. |
usually pubescent; lower glumes 5.5-8 mm, 1(3)-veined; upper glumes 7-10 mm, 5-veined, often mucronate; lemmas 8-13 mm, elliptic to lanceolate, rounded over the midvein, usually uniformly densely hairy, or the backs less densely so, apices acute to obtuse, entire; awns 5-8 mm, straight, arising less than 1.5 mm below the lemma apices; anthers 2.8-3.5(5) mm. |
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Caryopses | equaling or shorter than the paleas, thin, weakly inrolled to flat. |
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Lower | sheaths densely, often retrorsely, pilose; upper sheaths pubescent or glabrous; ligules 1-1.5 mm, hairy, obtuse, erose; blades 2-19 cm long, 1-4 mm wide, abaxial surfaces glabrous or hairy, adaxial surfaces hairy. |
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2n | = 28. |
= 14. |
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Bromus hordeaceus |
Bromus nottowayanus |
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Distribution |
AK; AR; AZ; CA; CO; CT; DE; IA; ID; IL; IN; KS; KY; LA; MA; MD; ME; MI; MO; MT; NC; ND; NE; NH; NJ; NM; NV; NY; OH; OK; OR; PA; RI; SC; SD; TN; TX; UT; VA; WA; WI; WY; HI; AB; BC; LB; NB; NS; NT; ON; QC; YT; Greenland
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AL; AR; GA; IA; IL; IN; KS; KY; MD; MI; MO; NC; NJ; NY; OH; OK; TN; TX; VA; ON
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Discussion | Bromus hordeaceus is native to southern Europe and northern Africa. It is weedy, growing in disturbed areas such as roadsides, fields, sandy beaches, and waste places, and can be found in many locations in the Flora region, with the exception of the central Canadian provinces and most of the southeastern United States. Its origin is obscure. Ainouche et al. (1999) reviewed various suggestions, and concluded that at least one of its diploid ancestors may have been an extinct or undiscovered species related to B. caroli-henrici, a diploid species. The four subspecies are usually morphologically distinct. Ainouche et al. (1999), however, found no evidence of genetic differentiation among them. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Bromus nottowayanus is native to the east-central and eastern United States from Iowa to New York, south to Oklahoma, northern Alabama, and Virginia. It grows in damp, shaded woods, often in ravines and along streams. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
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Key |
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Source | FNA vol. 24, p. 232. | FNA vol. 24, p. 216. | ||||||||||||
Parent taxa | Poaceae > subfam. Pooideae > tribe Bromeae > Bromus > sect. Bromus | Poaceae > subfam. Pooideae > tribe Bromeae > Bromus > sect. Bromopsis | ||||||||||||
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Subordinate taxa | ||||||||||||||
Synonyms | B. mollis | |||||||||||||
Name authority | L. | Fernald | ||||||||||||
Web links |
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