Polypogon australis |
Polypogon interruptus |
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Chilean beard grass, Chilean rabbit's-foot grass |
ditch beard grass, ditch rabbit's-foot grass |
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Habit | Plants perennial. | Plants perennial, often flowering the first year. |
Culms | 20-100 cm. |
20-80 (90) cm, more or less decumbent. |
Sheaths | smooth to scabridulous; ligules 1-3(4) mm, rounded to broadly acute, erose; blades 13-17 cm long, 5-7 mm wide, scabrous. |
smooth; ligules 2-6 mm, scabridulous-pubescent; blades 5-9 cm long, 3-6 mm wide. |
Panicles | 8-15 cm, lobed or interrupted, usually purplish; pedicels absent or vestigial; stipes 0.3-0.5 mm. |
3-15 cm long, 0.5-3 cm wide, usually interrupted or lobed; pedicels not developed; stipes 0.2-0.7 mm. |
Glumes | 1.5-3 mm, smooth to echinate, margins ciliate, apices acute to truncate, unlobed or lobed, lobes to 0.1 mm, awned, awns (3)4-6 mm, flexuous; lemmas 1-1.3 mm, awned, awns 2-3.5 mm, flexuous; paleas from shorter than to subequal to the lemmas; anthers 0.3-0.5 mm. |
2-3 mm, subequal, scabrous, larger prickles extending up the keel beyond midlength, not tapering to the apices, apices acute to truncate, unlobed or the lobes to 0.1 mm, awned, awns 1.5-3.2 mm, those of the lower and upper glumes subequal; lemmas 0.8-1.5 mm, glabrous, smooth and shiny, apices obtuse, not emarginate, awned, awns 1-3.2 mm; paleas about 3/4 as long as the lemmas; anthers 0.5-0.7 mm. |
2n | = unknown. |
= 28, 42. |
Polypogon australis |
Polypogon interruptus |
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Distribution |
AZ; CA; NV; WA
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AZ; CA; CO; LA; NE; NM; NV; NY; OK; OR; TX; UT; WA; WI; WY; HI
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Discussion | Polypogon australis is native to South America. It has become established in western North America, where it grows alongside ditches and streams. The records from Washington and Oregon are from ballast dumps; it is not known from recent collections in those states. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Polypogon interruptus grows in moist soil at lower elevations. It is native to the Western Hemisphere, extending south from the western United States into northern Mexico, and through the American tropics to Argentina and Bolivia. The more eastern records may indicate introductions; it is not known whether or not the species persists at these locations. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 24, p. 665. | FNA vol. 24, p. 663. |
Parent taxa | Poaceae > subfam. Pooideae > tribe Poeae > Polypogon | Poaceae > subfam. Pooideae > tribe Poeae > Polypogon |
Sibling taxa | ||
Name authority | Brongn. | Kunth |
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