Panicum anceps |
Panicum plenum |
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beak panicgrass |
canyon panicgrass |
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Habit | Plants perennial; conspicuously rhizomatous, rhizomes short or elongate, stout, scaly. | Plants perennial; cespitose, rhizomatous, rhizomes long. | ||||
Culms | 30-130 cm, terete to slightly compressed. |
50-200 cm, strongly compressed, decumbent-erect, glaucous; nodes glabrous. |
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Sheaths | laterally compressed, glabrous or sparsely to densely pilose or villous, especially at the summit; ligules less than 0.5 mm, membranous, erose, often brownish; blades 10-50 cm long, 4-12 mm wide, erect, adaxial surfaces pilose at least basally, glabrous or pilose abaxially. |
keeled, glabrous or pubescent near the throat, upper sheaths much shorter than the internodes; ligules 0.5-2 mm, membranous, dissected ciliate; blades 20-35 cm long, 7-17 mm wide, flat, glabrous on both surfaces or the adaxial surfaces sparsely pilose. |
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Panicles | 10-40 cm, 1/4 - 2/3 as wide as long, well-exserted at anthesis; branches relatively few, stiffly spreading or ascending; ultimate branchlets 1-sided; pedicels 0.1-3 mm, scabridulous to scabrous, appressed. |
12-50 cm, about 2/3 as wide, open; primary branches spreading, often verticillate at the lower nodes; pedicels 0.2-4 mm, scabrous, spreading. |
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Spikelets | 2.3-3.9 mm, narrowly ellipsoid to ovoid, usually subsessile, usually pale to yellowish-green, glabrous, often falcate and gaping at the apices, rarely lanceolate, densely crowded on short, appressed branchlets, set obliquely on short pedicels. |
2.5-3.4 mm long, about 1.2 mm wide, ellipsoid, glabrous. |
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Lower glumes | A-A as long as the spikelets, 3-veined, keels scabrous, apices acute; upper glumes and lower lemmas subequal, keeled, beaked, usually gaping at the apices; lower florets sterile; lower paleas subequal to the lower lemmas; upper florets 1.5-2.2 mm long, about 1 mm wide, 2/5 – 3/4 as long as the spikelets, apices with a tuft of minute, thick hairs; upper lemmas thick, stiff, clasping the upper paleas throughout their length. |
usually shorter than 1.7 mm, up to 1/2 as long as the spikelets, 3-veined, subacute; upper glumes and lower lemmas subequal, scarcely longer than the upper florets, 5-veined; lower florets sterile or staminate; upper florets 2.9-3 mm long, about 1 mm wide, ellipsoid, glabrous, dull, pale, obscurely transversely rugose, apices minutely pubescent. |
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2n | = 18, 36. |
= unknown. |
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Panicum anceps |
Panicum plenum |
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Distribution |
AL; AR; DC; DE; FL; GA; IA; IL; IN; KS; KY; LA; MD; MO; MS; NC; NJ; NY; OH; OK; PA; SC; TN; TX; VA; WV
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Discussion | Panicum anceps grows in low, moist, primarily sandy areas, pine savannahs, the borders of flood-plain swamps, mesic woodlands, roadsides, and upland pine-hardwood forests. It is restricted to the United States. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Panicum plenum grows in moist places in canyons, along streams, and on mountain slopes, from Arizona and Texas to central Mexico. It appears to be closely related to P. bulbosum. Flowering is from July into October. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
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Key |
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Source | FNA vol. 25, p. 478. | FNA vol. 25, p. 482. | ||||
Parent taxa | Poaceae > subfam. Panicoideae > tribe Paniceae > Panicum > subg. Agrostoidea > sect. Agrostoidea | Poaceae > subfam. Panicoideae > tribe Paniceae > Panicum > subg. Agrostoidea > sect. Bulbosa | ||||
Sibling taxa | ||||||
Subordinate taxa | ||||||
Name authority | Michx. | Hitchc. & Chase | ||||
Web links |