Part 3, 1915 J POACBAE 197 



102. Paspalum Humboldtianum Fliigge, Gram. Monog. 67. 1810. 



Paspalum ciliatum H.B.K. Nov. Gen. & Sp. 1: 87. 1815. 



A perennial plant with long roots tocks. Stems up to 1 m. tall, often branching below; 

 leaf-sheaths overlapping, ciliate, otherwise glabrous; blades up to 1.5 dm. long, 7-14 mm. wide, 

 lanceolate to linear-lanceolate, rounded or subcordate at the base, long-acuminate, flat, ciliate, 

 otherwise glabrous, *or appressed-hispid ; racemes 2-9, up to 1 dm. long, erect or ascending, the 

 rachis 0.7-1.2 mm. wide; spikelets 3 mm. long, 1-1.2 mm. wide, the first scale wanting, the 

 second and third scales 3-nerved, acute, the second scale appressed-pubescent on the surface, 

 ciliate with very long white hairs, the third scale glabrous or sparingly appressed-pubescent, 

 the fruiting scale yellowish, elliptic, acutish, sparsely pubescent at the apex. 



Typej locality: South America. 



Distribution: Mexico to Costa Rica; also in South America. 



Illustrations: H.B.K. Nov. Gen. & Sp. pi. 23, 24. 



103. Paspalum pectinatum Nees, Agrost. Bras. 34. 1829. 



Stems up to 8 dm. tall, tufted, glabrous, simple; leaf -sheaths strongly striate, the basal 

 glabrous, firm and thick, the upper glabrous or pubescent; blades up to 2.5 dm. long, 3-5 mm. 

 wide, linear, long-acuminate, hirsute; racemes in pairs, conjugate, with sometimes another 

 a short distance below, 3—6 cm. long, erect, the rachis 1.5-2 mm. wide; spikelets singly disposed, 

 5-6 mm. long, the first scale wanting, the second scale 3-nerved, or imperfectly 5-nerved, 

 membranous, thin, ciliolate, with a broad wing, the third scale 3-nerved, tuberculate-hispid 

 on the back, strongly tuberculate-ciliate, the fruiting scale thin, elliptic, obtuse, pubescent 

 at the apex. 



Type locality: Southern Brazil. 



Distribution: Costa Rica and Panama; also in Colombia and Brazil. 



Illustration: Trin. Ic. pi. 117. 



104. Paspalum saccharoides Nees; Trin. Ic. pi. 107. 1827. 



Saccharum polystachyon Sw. Prodr. 21. 1788. Not Paspalum polystachyum R. Br. 1810. 

 Panicum saccharoides Kunth, R6v. Gram. 237. 1830. 

 Syllepis polystachya Fourn. Mex. PL Gram. 52. 1881. 

 Tricholaena saccharoides Griseb. Fl. Brit. W. Ind. 557. 1864. 



Stems up to 1 m. tall or more; leaf-sheaths ciliate, otherwise glabrous; blades up to 3 dm. 

 long, 1-1.5 cm. wide, flat, pubescent on the upper surface, glabrous beneath; racemes numer- 

 ous, slender, lax, fascicled, up to 2.5 dm. long, the rachis about 0.5 mm. wide; spikelets 2.5-3 

 mm. long, 0.5-0.7 mm. wide, lanceolate, auricled at the base by the extension of the lateral 

 nerves, the first scale wanting, the second and third scales very delicate and thin, 2-nerved 

 by the suppression of the midnerve, the internerve hyaline, the second scale ciliate with hairs 

 2-3 times as long as the spikelet, the third scale lanceolate, glabrous, shorter than the first, 

 the fruiting scale yellowish-green, thin, smooth, about three fifths as long as the spikelet. 



Type locality: St. Kitts. 



Distribution: St. Kitts to Grenada; Costa Rica; Panama; also in northern South America. 



Illustrations: Trin. Ic. pi. 107; Kunth, Rev. Gram. pi. 30. 



Doubtful species 



Paspalum abbreviatum Trin.; Fourn. Mex. PI. Gram. 10. 1881. Type locality: Mexico. 



Paspalum affine Steud. Syn. Gram. 24. 1854. Type locality: Oaxaca. 



Paspalum densiflorum Doell, in Mart. Fl. Bras. 2 2 : 52. 1877. Said by Doell to occur 



in the West Indies. 



Paspalum effusum Nees, Jour. Bot. & Kew Misc. 2: 104. 1850. Reported from Nica- 

 ragua by Hemsley. 



Paspalum floribundum Desv. Opusc. 58. 1831. Type locality: Antilles? 



Paspalum geniculatum Raf. Fl. Ludov. 15. 1817. Type locality: Louisiana. 

 Paspalum Karwinskyi Fourn. Mex. PL Gram. 8. 1881. Type locality: Mexico. 

 Paspalum koleopodum Steud. Syn, Gram. 18. 1854. Type locality: Guadeloupe. 

 Paspalum lineare Fourn. Mex. PL Gram. 12. 1881. Type locality: Mexico. 

 Paspalum molle Poir. in Lam. Encyc. S: 34. 1804. Type locality: St. Thomas. 



