Polypogon elongatus |
Polypogon monspeliensis |
|
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southern beardgrass, streambank rabbitsfoot grass |
annual beard grass, annual rabbit's-foot grass, rabbitfoot beardgrass, rabbitfoot grass, rabbitfoot polypogon, rabbitsfoot grass |
|
Habit | Plants perennial, often flowering the first year. | Plants annual. |
Culms | to 100 cm, erect or decumbent at the base. |
5-65 (100) cm, erect to geniculately ascending. |
Sheaths | smooth, glabrous; ligules 4-8 mm, scabridulous, lacerate; blades 10-30 cm long, 4-15 mm wide. |
glabrous, the uppermost sheaths sometimes inflated; ligules 2.5-16 mm; blades 1-20 cm long, 1-7 mm wide. |
Panicles | 10-30 cm, erect or nodding, interrupted, dense; pedicels not developed; stipes 1.5-2.5 mm. |
1-17 cm, narrowly ellipsoid, dense, sometimes lobed, greenish; pedicels absent or to 0.2 mm; stipes 0.1-0.2 mm. |
Glumes | 3-5 mm, hispidulous, tapering from about midlength to the acute apices, apices unlobed, awned, awns 1-3 mm; lemmas about 1.5 mm, awned, awns 1-2 mm, arising from above midlength; paleas 1/2 - 2/3 as long as the lemmas; anthers 0.5-0.7 mm. |
1-2.7 mm, hispidulous throughout, largest prickles restricted to the lower 1/2, apices rounded, lobed, lobes 0.1-0.2 mm, 1/10 or less the length of the glume body, awned from the sinus, awns 4-10 mm, yellowish; lemmas 0.5-1.5 mm, glabrous, awned, awns 0.5-1(4.5) mm; paleas subequal to the lemmas; anthers 0.2-1 mm. |
2n | = 28, 56. |
= 14, 28, 35, 42. |
Polypogon elongatus |
Polypogon monspeliensis |
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Distribution |
AZ; CO; TX |
AK; AL; AR; AZ; CA; CO; CT; DE; FL; GA; ID; KS; LA; MA; MD; ME; MI; MN; MS; MT; NC; ND; NE; NH; NJ; NM; NV; NY; OK; OR; PA; SC; SD; TN; TX; UT; VA; WA; WI; WY; HI; AB; BC; MB; ON; QC; SK; YT
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Discussion | Polypogon elongatus is native from Mexico to Argentina. It now grows at scattered locations in the Flora region, primarily in California. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Polypogon monspeliensis is native to southern Europe and Turkey. It is now a common weed throughout the world, including much of the Flora region. It grows in damp to wet, often alkaline soils, particularly in disturbed areas. Vernon Harms (pers. comm., 2005) commented that the species' distribution in Saskatchewan appears to have increased greatly since the 1970s. The English-language name aptly describes the feel of the young panicles. In Europe, Polypogon monspeliensis hybridizes with Agrostis stolonifera, producing the sterile xAgropogon lutosus (p. 668); and with P. viridis, forming P. xadscendens Guss. ex Bertol. Only xAgropogon lutosus has been reported from the Flora region. It differs from P. monspeliensis in having more persistent spikelets, less blunt short-awned glumes, and lemmas with sub-terminal rather than terminal awns. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 24, p. 663. | FNA vol. 24, p. 665. |
Parent taxa | Poaceae > subfam. Pooideae > tribe Poeae > Polypogon | Poaceae > subfam. Pooideae > tribe Poeae > Polypogon |
Sibling taxa | ||
Name authority | Kunth | (L.) Desf. |
Web links |
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