Bromus hordeaceus |
Bromus lanatipes |
|||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
brome mou, lesser soft brome, lopgrass, soft brome, soft chess |
woolly brome, wooly brome |
|||||||||||||
Habit | Plants annual or biennial. | Plants perennial; not rhizomatous. | ||||||||||||
Culms | 2-70 cm, erect or ascending. |
40-90 cm, erect; nodes 3-5(7), mainly pubescent; internodes mostly glabrous, puberulent near the nodes. |
||||||||||||
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. |
10-25 cm, open, nodding; branches ascending to spreading. |
||||||||||||
Spikelets | (11)14-20(23) mm, lanceolate, terete to moderately laterally compressed; florets 5-10, bases concealed at maturity; rachilla internodes concealed at maturity. |
10-30 mm, elliptic to lanceolate, terete to moderately laterally compressed, with 7-12(16) florets. |
||||||||||||
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 glabrous, sometimes pubescent; lower glumes 5-6.5(7) mm, 1(3)-veined; upper glumes (6)7-9 mm, 3-veined, not mucronate; lemmas 8-11 mm, elliptic, rounded over the midvein, backs and margins pubescent, sometimes nearly glabrous, apices truncate or obtuse, entire, rarely emarginate, lobes shorter than 1 mm; awns 2-4 mm, straight, arising less than 1.5 mm below the lemma apices; anthers 1.8-4 mm. |
||||||||||||
Caryopses | equaling or shorter than the paleas, thin, weakly inrolled to flat. |
|||||||||||||
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. |
|||||||||||||
Basal | sheaths densely pilose or glabrous; upper sheaths glabrous or almost so, midrib of the culm leaves not abruptly narrowed just below the collar; auricles absent; ligules 1-2 mm, glabrous, truncate or obtuse, sometimes lacerate; blades 5-20 cm long, to 7 mm wide, flat, both surfaces glabrous, sometimes scabrous. |
|||||||||||||
2n | = 28. |
= 28. |
||||||||||||
Bromus hordeaceus |
Bromus lanatipes |
|||||||||||||
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
|
AZ; CO; NM; OK; TX
|
||||||||||||
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 lanatipes grows in a wide range of habitats at 800-2500 m, from Wyoming through the southwestern United States to northern Mexico. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
||||||||||||
Key |
|
|||||||||||||
Source | FNA vol. 24, p. 232. | FNA vol. 24, p. 220. | ||||||||||||
Parent taxa | Poaceae > subfam. Pooideae > tribe Bromeae > Bromus > sect. Bromus | Poaceae > subfam. Pooideae > tribe Bromeae > Bromus > sect. Bromopsis | ||||||||||||
Sibling taxa | ||||||||||||||
Subordinate taxa | ||||||||||||||
Synonyms | B. mollis | B. anomalus var. lanatipes, Bromopsis lanatipes | ||||||||||||
Name authority | L. | (Shear) Rydb. | ||||||||||||
Web links |
|