Tropicos | Name - !Digitaria horizontalis Willd.

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!Digitaria horizontalis Willd.

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Flora Data (Last Modified On 10/16/2012)

Species	DIGITARIA HORIZONTALIS
PlaceOfPublication	Enum. P1. 92. 1809.
Synonym	Phalaris velutinus Forsk. Fl. Aegypt. Arab. 17. 1775. Not Digitaria velutina Hitchc. 1927. Milium digitatum Swartz, Prodr. Veg. Ind. Occ. 24. 1788. Not Digitaria digitata Buse, 1854. Axonopus digitatus Beauv. Ess. Agrost. 12, 154. 1812. Panicum horizontale G. Meyer, Prim. Fl. Esseq. 54. 1818. Digitaria setosa Desv. ex Hamilt. Prodr. P1. Ind. Occ. 6. 1825. Digitaria jainaicensis Spreng. Syst. Veg. 1:272. 1825. Paspalum digitatum Kunth, Rev. Gram. 1:24. 1829. Panicum hamiltonii Kunth, Rev. Gram. 1: Suppl. IX. 1830. Syntherisma setosa Nash, Bull. Torrey Club 25:300. 1898. Panicum sanguinale var. digitatum Hack. ex Urban, Symb. Antill. 4:86. 1903. Panicum sanguinale subsp. horizontale Hack. Ergeb. Bot. Exped. Akad. Wiss. Siidbras. 8. 1906; Denkschr. Akad. Wiss. Math. Naturw. (Wien) 79:69. 1908. Syntherisma digitata Hitchc. Contr. U. S. Nat. Herb. 12:142. 1908. Digitaria digitata Urban, Symb. Antill. 8:24. 1920. Not D. digitata Buse, 1854.
Description	Similar in habit, size, and pubescence to D. sanguinalis, the blades usually more densely pilose; racemes slender, approximate on a short axis rather than digitate, the rachis 0.4 mm. wide, very narrowly winged, with a few scattered, spreading, long white hairs; spikelets 2 mm. long; first glume minute or wanting; second glume about half as long as the fruit, sparsely villous at the tip; sterile lemma sub- glabrous or sparsely pilose or villous on the margins, the hairs short.
Distribution	A common weed in cultivated ground and waste places in tropical and sub- tropical regions. More frequent than D. sanguinalis in the Tropics.
Specimen	BOCAS DEL TORO: Isla Colon, von Wedel 1359. CANAL ZONE: Toro Point, Hitchcock 8058; Monte Lirio, Maxon 6844; Obispo, Standley 3I776; Las Cascadas Plantation, Stand- ley 29548; Empire to Mandinga, Piper 5239; Culebra, Hitchcock 79I6; Summit, Standley 30I24. PANAMA: Juan Diaz, Standley 30620; Pacora, Killip 4240; Chepo, Pittier 4693; Point Chame, Hitchcock 8i63; Taboga Island, Hitchcock 8078; Standley 27954.

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