Vulpia octoflora |
Vulpia octoflora var. octoflora |
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eight-flower six-weeks grass, pullout grass, six-weeks fescue, six-weeks grass, six-weeks vulpia |
six-weeks fescue |
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Culms | 5-60 cm, solitary or loosely tufted, glabrous or pubescent. |
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Sheaths | glabrous or pubescent; ligules 0.3-1 mm; blades to 10 cm long, 0.5-1 mm wide, flat or rolled, glabrous or pubescent. |
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Spikelets | 4-10(13) mm, with (4)5-11(17) florets; rachilla internodes 0.5-0.7 mm. |
usually 5.5-10(13) mm, usually not or only slightly overlapping. |
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Lower glumes | 1.7-4.5 mm, 1/2 - 2/3 the length of the upper glumes; upper glumes 2.5-7.2 mm; lemmas 2.7-6.5 mm, 5-veined, smooth, scabrous, or pubescent, apices entire, no more pubescent than the bases, awns of the lowermost lemma in each spikelet 0.3-9 mm; paleas slightly shorter than the lemmas, apices entire or minutely bifid, teeth shorter than 0.2 mm; anthers 0.3-1.5 mm. |
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Caryopses | 1.7-3.7 mm. |
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Panicle(s) | 1-7(20) cm long, 0.5-1.5 cm wide, with 1-2 branches per node; branches appressed to spreading. |
branches erect to ascending, lower branches sometimes spreading distally. |
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Lemmas | usually smooth, sometimes scabridulous distally and on the margins; awns of the lowermost lemma in each spikelet 3-9 mm. |
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2n | = 14. |
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Vulpia octoflora |
Vulpia octoflora var. octoflora |
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Distribution |
AL; AR; AZ; CA; CO; CT; DC; DE; FL; GA; IA; ID; IL; IN; KS; KY; LA; MA; MD; ME; MI; MN; MO; MS; MT; NC; ND; NE; NH; NJ; NM; NV; NY; OH; OK; OR; PA; RI; SC; SD; TN; TX; UT; VA; VT; WA; WI; WV; WY; AB; BC; MB; ON; QC; SK
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AL; AR; AZ; CA; CO; CT; DC; FL; GA; IA; ID; IL; IN; KS; KY; LA; MD; MI; MN; MO; MS; MT; NC; ND; NE; NJ; NM; NV; NY; OK; OR; PA; SC; SD; TN; TX; UT; VA; VT; WA; WI; WV; WY; AB; BC; MB; ON; SK |
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Discussion | Vulpia octoflora, a widespread native species, tends to be displaced by the introduced Bromus tectorum in the Pacific Northwest. It grows in grasslands, sagebrush, and open woodlands, as well as in disturbed habitats and areas of secondary succession, such as old fields, roadsides, and ditches. Three varieties are recognized here, but their characterization is not completely satisfactory, e.g., plants of the southwestern United States with spikelets in the size range of var. glauca often have densely pubescent lemmas, the distinguishing characteristic of var. birtella. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Vulpia octoflora var. octoflora is widespread throughout southern Canada, the United States, and Mexico, and has been introduced into temperate regions of South America, Europe, and Asia. It is most common from northern Oklahoma to Virginia, south to the Texas Gulf prairie and Florida. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
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Key |
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Source | FNA vol. 24, p. 450. | FNA vol. 24, p. 450. | ||||||||
Parent taxa | Poaceae > subfam. Pooideae > tribe Poeae > Vulpia | Poaceae > subfam. Pooideae > tribe Poeae > Vulpia > Vulpia octoflora | ||||||||
Sibling taxa | ||||||||||
Subordinate taxa | ||||||||||
Synonyms | Festuca octoflora | |||||||||
Name authority | (Walter) Rydb. | unknown | ||||||||
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