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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 GEMINATUM
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PlaceOfPublication
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Fl. Aegypt. Arab. 18. 1775
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Synonym
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Paspalum appressum Lam. Tabl. Encycl. 1:176. 1791. Digitaria appressa Pers. Syn. P1. 1:85. 1805. Panicum beckmanniaeforme Mikan ex Trin. in Spreng. Neu. Entd. 2:83. 1821. Panicum truncatum Trin. Gram. Pan. 130. 1826. Panicum brizaeforme Presl, Rel. Haenk. 1:302. 1830. Panicum carnosum Salzm. ex Steud. Syn. P1. Glum. 1:60. 1854. Panicum glomeratum Buckl. Prel. Rep. Geol. Agr. Surv. Tex. App. 3. 1866. Panicum appressum Lam. ex Doell in Mart. Fl. Bras. 22:184. 1877. Paspalidium geminatum Stapf in Prain, Fl. Trop. Afr. 9:583. 1920.
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Description
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Perennial; culms cespitose, spreading from a decumbent base, 25-85 cm. long, succulent at least toward the base, smooth, shining; sheaths longer than the inter- nodes, more or less inflated; ligule ciliate, about 1 mm. long; blades 10-20 cm. long, 3-6 mm. wide, flat or loosely rolled, glabrous on the lower surface, scaberulous on the upper, the margins glabrous or scabrous; panicle 12-30 cm. long with 12- 18 rather short erect or ascending racemes; spikelets 2-2.5 mm. long, about 1.5 mm. wide, acute, the first glume 0.5 mm. long, clasping, truncate; fruit strongly transversely rugose.
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Distribution
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Wet ground, ditches, often floating in margins of lakes. Tropical regions of both hemispheres.
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Specimen
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CANAL ZONE: Balboa, Standley 2563I, 30877; Gatu'n, Hitchcock 7980; Killip 4292; between Corozal and Ancon, Pittier 2168, 2170; Pedro Miguel, Hitchcock 7956; Empire, Pittier 37I4; Barro Colorado Island, Kenoyer I24.
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