Dichanthelium strigosum |
Dichanthelium strigosum subsp. glabrescens |
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cushion-tuft panicgrass, roughhair rosette grass |
roughhair rosette grass |
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Habit | Plants densely cespitose. | |||||||||
Culms | 5-45 cm, slender, erect or spreading; from a dense tuft of predominantly basal leaves, lower internodes short, upper 3-5 internodes elongate; nodes glabrous or bearded; internodes glabrous or pilose; fall phase with spreading culms and branches arising from near the bases forming a dense, flat tuft. |
usually less than 30 cm, glabrous, usually very densely cespitose; nodes glabrous. |
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Cauline leaves | 2-4; lower cauline sheaths longer than the internodes, mostly glabrous or pilose with ascending hairs, margins finely ciliate; ligules 0.2-2 mm, at low magnification appearing to be membranous and ciliate, at high magnification evidently of hairs that are coherent at the base; blades 1.5-6 cm long, 3-8 mm wide, lanceolate, glabrous or softly pilose, margins with prominent papillose-based cilia, at least basally. |
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Spikelets | 1.1-2.1 mm, obovoid to broadly ellipsoid, glabrous or pubescent, hairs not papillose-based. |
1.4-1.8 mm, glabrous, obovoid; lower glumes about 1/3 as long as the spikelets. |
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Lower glumes | 1/3 - 1/2 as long as the spikelets, acute to obtuse; upper florets 0.8-1.7 mm, ellipsoid, subacute. |
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Basal | rosettes poorly differentiated; blades 1-5 cm, lanceolate, grading into the cauline blades. |
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Primary | panicles short- to long-exserted; rachises and branches often pilose. |
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Cauline | blades mostly glabrous, sometimes sparsely pilose basally. |
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2n | = unknown. |
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Dichanthelium strigosum |
Dichanthelium strigosum subsp. glabrescens |
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Distribution |
AL; FL; GA; LA; MS; NC; SC; TN; TX; VA; PR
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Discussion | Dichanthelium strigosum extends from the southeastern Flora region south into Mexico, the Caribbean, and into northern South America. The primary panicles are briefly open-pollinated in April or May; the secondary panicles, which are produced from May through November, are cleistogamous. The three subspecies are mostly sympatric and sometimes grow together, with occasional intergradation. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Dichanthelium strigosum subsp. glabrescens grows in sandy, open pine woods and bogs. Its range extends from Mississippi along the coast to Florida and south through the West Indies. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
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Key |
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Source | FNA vol. 25, p. 446. | FNA vol. 25, p. 447. | ||||||||
Parent taxa | Poaceae > subfam. Panicoideae > tribe Paniceae > Dichanthelium > sect. Strigosa | Poaceae > subfam. Panicoideae > tribe Paniceae > Dichanthelium > sect. Strigosa > Dichanthelium strigosum | ||||||||
Sibling taxa | ||||||||||
Subordinate taxa | ||||||||||
Synonyms | Panicum strigosum | Panicum strigosum var. glabrescens | ||||||||
Name authority | (Muhl. ex Elliott) Freckmann | (Griseb.) Freckmann & Lelong | ||||||||
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