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(Last Modified On 10/18/2012)
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(Last Modified On 10/18/2012)
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Species
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PANICUM ZIZANIOIDES
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PlaceOfPublication
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Nov. Gen. & Sp. 1:100. 1815.
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Synonym
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Panicum oryzoides Swartz, Prodr. Veg. Ind. Occ. 23. 1788. Panicum pseudoryzoides Steud. Syn. P1. Glum. 1:75. 1854. Acroceras oryzoides Stapf in Prain, Fl. Trop. Afr. 9:622. 1920. Acroceras zizanioides Dandy, Jour. Bot. Brit. & For. 69:54. 1931.
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Description
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Perennial; culms 50 cm. to as much as 2 m. long, decumbent-spreading, rooting at the nodes, the lower internodes short; sheaths mostly shorter than the internodes, glabrous or papillose-hispid toward the summit; hispid in the throat, the margins ciliate; ligule about 0.5 mm. long, membranaceous; blades 4-15 cm. long, 8-30 mm. wide, acuminate, cordate, the margins very scabrous; panicles 10-25 cm. long, the few rather distant branches stiffly ascending or spreading, nearly simple; spikelets paired, rather short-pedicellate, appressed, 5.5-6 mm. long, glabrous; first glume broad, clasping, about two-thirds as long as the spikelet; second glume and sterile lemma equal, laterally compressed and keeled at the summit; fruit 4.7-5 mm. long, smooth and shining, laterally compressed at the summit forming a small crest.
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Distribution
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Woods, swamps, and moist open ground, Mexico (Veracruz) and the West Indies to Paraguay.
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Specimen
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BOCAS DEL TORO: Pumpkin River, von Wedel 2579; Changuinola Valley, Dunlap 202, 230. CHIRIQUI: David, Hitchcock 835I. COLON: Rio Sirri, Pittier 4026. CANAL ZONE: Barro Colorado Island, Kenoyer I2I; Juan Mina, Bartlett d Lasser I64II, I6525, I6750; Gamboa, Pittier 378I, 4790; Tabernilla, Hitchcock 8II2, 8385; Fort Kobe road, Woods'on, Allen d Seibert I4I3; Balboa, Standley 25440, 29253. PANAMA: La Jagua, Bartlett d Lasser I6389, I6987, I699I; Taboga Island, Killip 4I37.
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