Hitchcock — The Grasses of Hazvaii 205 



This species is a good forage grass and has been grown successfully on 

 Hawaii and IMolokai. It thrives in loose or sandy soil at medium altitudes in the 

 drier regions. A fine field of this was observed on Mr. George Cooke's ranch, 

 Molokai. 



Grassland and along roadsides; introduced, abvmdantly naturalized in 

 Molokai and Hawaii. Originally described from South Africa. 

 Kauai: Hanamaulu, Faurie 1354. 



Oahu: Kaimuki, Forbes 1938. Schofield Barracks, Hitchcock 13980. 

 Molokai: ^^'estern part, Hitchcock 15150. Kaunakakai Gulch, Forbes 625. 

 Hawaii: Kukuihaele, Rock 451 1. Kukaiau Ranch, Hitchcock 14206. 



42. CHAETOCHLOA Scribn. 

 rSetaria Beauv.) 



Spikelets subtended by one to several bristles (sterile branchlets), falling free from the 

 bristles, awnless; first glume broad, commonly less than half the length of the spikelets, 3 to 5 

 nerved ; second glume and sterile lemma equal, or the former shorter, several-nerved ; fertile 

 lemma coriaceous indurate, smooth or rugose. Annual or perennial grasses, with narrow termi- 

 nal panicles, these dense and spikelike, or somewhat loose and open. 



Blades narrowly elliptic, as much as g cm. wide, plaited; bristles below only a part of the spike- 

 lets; panicles loose and open i. C. palmifolia. 



Blades linear-lanceolate to linear, mostly not over i cm. wide ; bristles below all the spikelets ; 

 panicle spikelike, cylindric. 



Bristles below each spikelet i to 3, retrorsely scabrous 2. C. verticillata. 



Bristles below each spikelet more than 5, antrorsely scabrous. 



Plants annual , 3. C. lutescens. 



Plants perennial 4. C. geniculata. 



I. Chaetochloa palmifolia (\\'illd.) Hitchc. & Chase, Contr. U. S. Nat. Herb. 18:348. 1917. 



Panicwn pahnifoUmn Willd. ; Poir. in Lam. Encycl. Suppl. 4:282. 1816. 



Panicum nervosum Roxb. Fl. Ind. ed. Carey i :3i4. 1820. Not P. nervosum Lam. 1798. 



Panicuni ncurodes Schult. Want. 2:228. 1824. 



Plants perennial ; culms erect, i to 2 meters tall, some plants depauperate, more or less 

 appressed-hispid below and at the nodes ; sheaths papillose and more or less hispid ; blades 

 resembling those of a young palm, narrowly elliptic, as much as 50 cm. long and 9 cm. wide, 

 acuminate, narrowed almost to a petiole, flat, strongly nerved and plicate, scabrous on the upper 

 surface, pubescent beneath : panicle large and open, as much as 60 cm. long, consisting of 

 numerous slender spreading branches as much as 20 cm. long, the spikelets on short appressed 

 branchlets or toward the ends single, the axis and branches very scabrous, the branchlets 

 bearing here and there slender flexuous bristles, about i cm. long ; spikelets lanceolate, green, 

 glabrous, about 4 mm. long on scabrous pedicels about i mm. long; first glume broad, ovate, 

 rather obtuse, 3-nerved, about one-third as long as the spikelet ; second glume a little shorter 

 than the fruit, 7-nerved ; sterile lemma with a point extending a little beyond the fruit, 5-nerved, 

 the narrow palea about two-thirds as long: fertile lemma lanceolate with a short somewhat 

 incurved point; rather obscurely transversely rugose (fig. 97). 



This species belongs to the section Ptychophyllum, characterized by the 

 large plicate blades and usually loose panicle with lanceolate fruit and few bristles. 

 The name Panicum plicatum Lam. has been applied to this species but an exami- 

 nation of Lamarck's type at Paris showed it to have narrow blades 20 cm. long 

 and 12 mm. \\ide and a narrow panicle. 



[107] 



