234 NORTH AMERICAN FlyORA [VOLUME 17 



pointed; first glume about half the length of the spikelet, 3-nerved, acute; second glume and 

 sterile lemma equal, 3-5 -nerved, exceeding the fruit, the sterile palea only about half the length 

 of its lemma; fruit 1 mm. long, 0.5 mm. wide, obovate. 



Type locality: On the Ilheos River, Brazil. 

 Distribution: Southern Mexico to Paraguay. 

 Illustration: Contr. U. S. Nat. Herb. 15: /. 107. 



66. Panicum milleflorum Hitchc. & Chase, Contr. U. S. Nat. 



Herb. 17: 494. 1915. 



Plants perennial ; culms ascending or erect from an elongate creeping base, rooting at the 

 nodes, glabrous, 0.8-2 meters high, 4-5 mm. thick, compressed, the nodes pubescent or gla- 

 brous, usually with one to several long erect panicle-bearing branches ; leaf -sheaths about as 



long as the internodes, keeled toward the summit, ciliate on the margin and puberulent at the 

 juncture with the blade, otherwise glabrous or sparsely papillose-hispid; ligule wanting, the 

 ligular region puberulent; blades flat, 20-40 cm. long, 1-2 cm. wide, rarely wider, long-acuminate, 

 somewhat narrowed to the subcordate base, glabrous or very sparsely hirsute, the margin 

 scabrous; panicles 20-35 cm. long, about 6 cm. wide, in outline tapering to both ends, consisting 

 of numerous ascending or spreading, often curving slender spike-like branches solitary or in 

 fascicles along an elongate glabrous axis, the lower distant, the upper approximate, the scabrous 

 angled often sparsely pilose rachises bearing throughout their length along their lower side 

 evenly disposed short approximate densely flowered branchlets, those of the lower branches 

 sometimes as much as 15 mm. long, the others 1-2 mm. long; spikelets subsessile, 1.3 mm. 

 long, about 0.5 mm. wide, glabrous, the first glume about one third the length of the spikelet, 

 the second glume and sterile lemma equal, the lemma inflated boat-shaped with a large mem- 

 branaceous palea; fruit 1.2 mm. long, 0.4 mm. wide, acute, the lemma boat-shaped. 



Type locality: Frijoles, Canal Zone. 

 Distribution: Panama to Trinidad. 

 Illustration: Contr. U. S. Nat. Herb, 17:/. 70. 



67. Panicum pilosum Sw. Prodr. 22. 1788. 



Panicum distichum Lam. Encyc. 4: 731. 1797. 



Panicum pilisparsum G. Meyer, Fl. Esseq. 57. 1818. 



Panicum trichophorum Schrad.; Schultes, in R. & S. Syst. Veg. Mant. 2: 247. 1824. 



Setaria disticha Humb.; Spreng. Syst. 1: 305. 1825. 



Panicum distans Willd.; Spreng. Syst. 1: 305, as synonym. 1825. 



Panicum densiflorum Willd.; Spreng. Syst. 1: 320. 1825. 



Setaria pilosa Ktinth, Rev. Gram. 47. 1829. 



Setaria Meyeri Kunth, Rev. Gram. 47. 1829. 



Setaria Schraderi Kunth, Rev. Gram. 47. 1829. 



Panicum apiculatum Salzm.; Steud. Syn. Gram. 65, as synonym. 1854. 



Plants perennial, usually decumbent or creeping at base, rooting at the nodes and sending 

 up erect branches, smaller plants sometimes erect; culms usually branching, 25-100 cm. high, 

 the nodes villous or sometimes glabrous or nearly so; leaf -sheaths elongate, but usually less 

 so than the internodes, keeled, separating more or less from the culm, exposing the long pro- 

 phyllum, and inrolled at the summit, somewhat simulating a petiole to the blade, glabrous or 

 sometimes ciliate or sparsely hirsute; llgules wanting; blades ascending or spreading, narrowly 

 lanceolate, 4—20 cm. long, 7-15 mm. wide, broadest near the cordate or truncate base, puberu- 

 lent at the very base, otherwise glabrous or sometimes sparsely pubescent; panicles consisting 

 of 10-40 spike-like, densely flowered, somewhat spreading racemes along an axis 5-15 cm. long, 

 the lower distant; racemes 1-3 cm. long, straight or curved, bearing numerous spikelets in 

 clusters of 1-3 secund on the lower side, the rachises copiously to sparsely papillose-hispid, 

 the hairs 1-3 mm. long, wanting in occasional specimens; spikelets about 1.5 mm. long, 0.6 

 mm. wide, and nearly 1 mm. thick; first glume about half the length of the spikelet; second 

 glume and sterile lemma equal, the former 5-, the latter 3-nerved, both scabrous on the midnerve 

 at the apex, the sterile palea as long as its lemma, becoming subrigid and forcing open the 

 spikelet; fruit 1.3 mm. long, 0.6 mm. wide. 



Type locality: Jamaica. 



Distribution: Mexico and the West Indies to Paraguay. 



Illustrations: Trin. Ic. pi. 213; Contr. U. S. Nat. Herb. IS: /. 108. 



