Polypogon viridis |
Polypogon fugax |
|
---|---|---|
beardless rabbit's-foot grass, water beard grass, water bentgrass |
Asia minor bluegrass, Asian beardgrass |
|
Habit | Plants perennial, often flowering the first year. | Plants annual. |
Culms | 10-90 cm, sometimes decumbent and rooting at the lower nodes. |
(8.5) 15-60 cm, often decumbent at the base and rooting at the nodes. |
Sheaths | glabrous, smooth; ligules to 5 mm; blades 2-13 cm long, 1-6 mm wide. |
smooth; ligules 2-8 mm; blades 2-16 cm long, 2-11 mm wide, scabrous. |
Panicles | 2-10 cm, ovate-oblong to pyramidal, dense but interrupted, pale green to purplish; pedicels not developed; stipes 0.1-0.6 mm. |
3-15 cm long, 0.5-5 cm wide, narrowly ovoid, oblong, or cylindrical, dense, usually lobed, pale green or yellowish; pedicels absent or to 0.5 mm; stipes 0.2-1.3 mm. |
Glumes | 1.5-2 mm, scabrous on the back and keel, apices obtuse or truncate, unawned; lemmas about 1 mm, erose, unawned; paleas subequal to the lemmas; anthers 0.3-0.5 mm. |
1.8-2.4 mm, equal to subequal, scabridulous to echinate, not tapering to the apices, apices acute to rounded, lobed, lobes 0.1-0.2 mm, awned from the sinuses, awns 0.6-3 mm, those of the lower and upper glumes subequal to equal, flexuous; lemmas 0.9-1.2 mm, smooth, unawned or awned, awns to 2 mm, flexuous; paleas 0.7-1.2 mm, from 3/4 as long as to equaling the lemmas; anthers 0.3-0.6 mm. |
2n | = 28, 42. |
= 42. |
Polypogon viridis |
Polypogon fugax |
|
Distribution |
AZ; CA; CO; CT; NJ; NM; NV; OK; OR; SC; TX; UT; VA; WA; WY; HI; PR; BC
|
HI |
Discussion | Polypogon viridis grows in mesic habitats associated with rivers, streams, and irrigation ditches. It is native from southern Europe to Pakistan, but is now established in the Flora region, particularly the southwestern United States. Records from the Atlantic coast are based on plants found on ballast dumps; there have been no recent collections from these locations. In Europe, Polypogon viridis hybridizes with P. monspeliensis, forming P. xadscendens Guss. ex Bertol.; no such hybrids have been reported from the Flora region. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Polypogon fugax is native from Iraq to Myanmar [Burma]. It was collected in Santa Barbara, California, and from salt marshes around Oakland, California, in the nineteenth century, and from Portland, Oregon, in the early twentieth century. There are no recent collections from the Flora region. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 24, p. 663. | FNA vol. 24, p. 663. |
Parent taxa | Poaceae > subfam. Pooideae > tribe Poeae > Polypogon | Poaceae > subfam. Pooideae > tribe Poeae > Polypogon |
Sibling taxa | ||
Synonyms | P. semiverticillatus, Agrostis viridis, Agrostis verticillata, Agrostis semiverticillata | |
Name authority | (Gouan) Breistr. | Nees ex Steud. |
Web links |
|
|