17 



ciliate above; ligule short, hispid-ciliate; leaf-blades flat, soft, 7 to 18 cm. long, 6 

 to 12 mm. wide, acuminate, abruptly narrowed at the rounded base, scabrous on 

 both sides, serrulate-scabrous on the cartilaginous margins. Panicles spike-like; 

 rachis striate, angular, scabro-hispid ; branches subverticillate, short, densely 

 flowered; setfe 1 to 3, stout, flexuous, retro rsely scabrous to the very base, 3 to 

 6 mm. long. Spikelets nearly sessile, narrowly elliptical -ovate, acute, 2 to 2.5 

 mm. long; first glume triangular-ovate, acute, 3-nerved, one-third as long as the 

 spikelet; second glume elliptical-ovate, 5 to 7 nerved, mucronate, nearly equal- 

 ing the 5 to 7 nerved acute third glume and slightly exceeding the flowering 

 glume; third glume subtending a lanceolate, hyaline palea two-thirds its own 

 length; flowering glume about 2 mm. long, narrowly elliptical, rounded at the 

 apex and very shortly apiculate, smooth or with very flue transverse wrinkles 

 below the middle. Palea similar in markings, equaling the glume. 



A cosmopolitan weed widely distributed in the eastern United States. Introduced 

 from Europe. July-October. 



Specimens examined. — Mas.'iacltusetts: Salem, Conant 1879. Connecticui: New Haven, 

 Allen 1879. Pennstjlvama: Philadelphia, Parker 1877; Stickers, Smith; Easton, 

 Porter 1895. Delaware: Wilmington, 145 Commons 1897. District of Columbia: 

 Vasey 1886. Alabama: IMobile, 1-t INIohr 1891. Keniuchj: Lexington, Short 1835. 

 loim: Mt. Cyr, 929 Beard 1897; Mt. Pleasant, 773 Mills 1897. Missouri: St. Louis, 

 267 Eggert 1886. Wisconsin: Oshkosh, Random 1896. 



7. CH^TOCHLOA SCANDENS (Jacq.) n. comb. Pennisetum scandens Jacq. 

 Hort. Vindb. (1801). Setaria scandem Schrad. in R. & S. Mant. 2: 279 (1824). 

 Panicum scandens Trin. Gram. Pan. 166 (1826) . 



An erect or ascending c?espitose annual, 4 to 7 dm. high, with geniculate, subcom- 

 pressed culms, linear-lanceolate leaves, and loose, bristly subspiciform panicles 

 4 to 12 dm. long. Culms slender, branching at the base, scabrous below the 

 panicle, otherwise glabrous; nodes bi'own or black, smooth; sheaths loose, striate, 

 compressed, glabrous or slightly scabrous above, about equaling the internodes, 

 margins ciliate above; ligule very short, bearded; leaf-blades linear to linear- 

 lanceolate, spreading, plane, 5 to 16 cm. long, 2 to 5 mm, wide, long-acuminate, 

 abruptly narrowed at the rounded base, scabrous and short strigose-pubescent on 

 both sides, serrulate-scabrous on the cartilaginous margins. Panicle cylindrical, 

 1 to 1.5 cm. in diameter; rachis striate, densely short-pubescent or pilose; 

 branches short, few-flowered, contiguous, spirally arranged; setae 1 to 3, gener- 

 ally purplish, flexuous, 1 to 2 cm. long, retrorsely scabrous above, antrorsely 

 scabrous at the base, spreading. Spikelets 1 to 1.5 mm. long, ovate, acute, green 

 or purplish; first glume broadly ovate, acute, 3-nerved, one-half as long as the 

 spikelet and inclosing its base; second and third glumes equaling the flowering 

 glume, 5-nerved, acute, apiculate, the third somewhat sulcate; flowering glume 

 ovate, acute, 1 to 1.5 mm. long, striate, transversely undulate-rugose below, 

 nearly smooth above, the inclosed palea ovate, striate, concave. 



West Indies, Central and South America. 



Specimens examined.— Pnerio Eico: 6498 Sintenis 1887, distributed as Setaria verticillaia 

 Beauv. Honduras: 5583 bis J. Donnell Smith 1888. Guatemala: Buena Vista, 

 4295 J. Donnell Smith 1892. Venezuela: 1144 Fendler 1854-55; 1644, 1856-57. 

 Brazil: 4356, 4510 Burchell; 174 Riedl. 



Readily distinguished from C. verticillata by its smaller spikelets, strigose-pubescent 

 leaves, and longer, irregularly spreading setee, which are retrorsely scabrous 

 above and antrorsely scabrous at the base. 

 13788— No. 21 2 



