HITCHCOCK REVISIONS OF NORTH AMERICAN GRASSES. 191 



DISTRIBUTION. 



Cultivated throughout the warmer part3 of the Old World and in the United States, 

 especially from Nebraska to Texas; escaped from cultivation, and appearing more 

 or less as a waif in waste places throughout the United States. 



16. Chaetochloa longipila (Fourn.) Scribn. & Merr. 



Setaria longipila Fourn. Mex. PL 2: 47. 1886. "Absque loco (Jurg. n. 722)." The 

 type has not been examined, but the description appears to apply to the specimen cited 

 below (Rose 2017). Fournier mentions the long white hairs on the rachis, the length 

 of the first glume, and the rugose fertile lemma. 



Chaetochloa longipila Scribn. & Merr. U. S. Dept. Agr. Div. Agrost. Bull. 21: 22. 

 1900. Based on Setaria longipila Fourn. 



DESCRIPTION. 



Plants annual; culms erect, branching at base, glabrous, scabrous just below the 

 panicle, 30 to 40 cm. tall, the nodes hispidulous; sheaths mostly glabrous, sometimes 

 scaberulous at summit or sparsely hispid, 

 densely ciliate on the margin, hispid on 

 the collar; ligule a dense line of stiff white 

 hairs 2 to 3 mm. long; blades flat, 7 to 10 

 cm. long, as much as 1 cm. wide, scabrous 

 and sometimes sparsely hispidulous, nar- 

 rowed toward each end; panicle spikelike, 

 cylindric, somewhat interrupted, rather 

 densely flowered, narrowed toward the 

 summit, 4 to 7 cm. long, about 5 mm. 

 wide, the axis thickly beset with white, 

 ascending, rather stiff flexuous hairs 

 about 2 mm. long; branches short and 

 ascending, the rachis somewhat villous 

 like the main axis; bristles mostly one 

 below each spikelet, mostly 3 to 5 cm. 

 long, antrorsely scabrous; spikelets about 

 1.7 mm. long, turgid on the convex side; 

 first glume about half as long as the 

 spikelet, 3-nerved; second glume about as 

 long as the fertile lemma or \ ery slightly 

 shorter, 5-nerved; somewhat pointed; 

 sterile lemma as long as the fertile, 5- 

 nerved, slightly pointeu; fertile lemma 

 sharply transversely rugose. 



This species is aistinguished by the small spikelets and the densely villous axis of 

 the panicle. 



distribution. 



Tepic: 



Fig. 50.- 



■Chaetochloa longipila. 

 Mexico. 



From Rose 2017, 



Woods, between Aguacata and Dolores, Rose 2017. 



17. Chaetochloa corrugata (Ell.) Scribn. 



9/fr 



Panicum corrugatum Ell. Bot. S. C. & Ga. 1 : 113 . 1816. ' ' Sent to me from Savannah 

 by Dr. Baldwin." The type, in the Elliott Herbarium, is the upper part of a culm 

 with a panicle and one leaf. 



Pennisetum corrugatum Nutt. Gen. PI. 1: 55. 1818. A nomen nudum, but proba- 

 bly based on Panicum corrugatum Ell. The name is given as a synonym of Setaria 

 corrugata. by Schultes. 1 



Mant. 2: 276. 1824. 



