38 



tending a linear-lanceolate, hyaline palea; flowering glume narrowly ovate, 

 acute, short-apiculate, striate, quite strongly transversely undulate-rugose below, 

 striate or pitted at the apex, the inclosed palea narrowly ovate, slightly convex 

 at the base, plane above, striate. 

 Dry soil, in thickets, etc., Texas. July-October. 



Specimens examined. — Texas: Reverchon 1885; Nealley 1888; 164, 564 Lindheimer 

 1846; 357 Lindheimer 1845; Kerrville, Smith 1897; Gillespie Co., 783 Jermy; 



Mouth of Pecos River, 

 34 Havard 1883. 



= = Panicle long-attenuate at 

 the apex. 



27. Cheetocliloa caudata 

 (Lam.) Scribn. Rept. Mo. 

 Bot. Gard. 10: 52 (1899). 

 Paniciim caudatum Lam. 

 Illus. 1 : 171 (1791) . Seta- 

 rui caudata R. & S. Syst. 

 2:495(1817). (Fig. 23.) 

 A very slender, somewhat 

 csespitose annual 3 to 6 

 dm. high, with elongated, 

 interrupted jjanicles and 

 narrow, linear leaves 1 to 

 2.5 dm. in length. Culms 

 much branched from the 

 base, geniculate, glabrous, 

 cylindrical, very slender; 

 nodes smooth ; sheaths 

 about equaling the inter- 

 nodes, pubescent, ciliate 

 on the margins; ligule 

 short, ciliate. Leaf-blades 

 linear, 1 to 2.5 dm. long, 

 3 to 5 mm. wide, pubes- 

 cent on both sides, slightly 

 scabrous on the midvein 

 and margins, long filiform- 

 attenuate at the apex, the 

 upper ones generally 

 equaling or exceeding the 

 culms. Panicles 5 to 15 

 cm. long, attenuate, few- 

 flowered; rachis slender, 

 flexuous, angular, pilose; branches very short, not exceeding 5 mm., or obsolete; 

 setse solitary, flexuous, 4 to 10 mm. long, antrorsely scabrous, sometimes someAvhat 

 pilose below. Spikelets ovate, acute, short-pedicellate; first glume nearly one- 

 half as long as the spikelet, ovate, acute, 5-nerved ; second glume two-thirds the 

 length of the spikelet,broadly ovaie, acute, short apiculate, 5 to 7 nerved; third 

 glume equaling the spikelet, 5-nerved ; flowering glume ovate, acute, short apicu- 

 late, striate, transversely undulate-rugose below, smooth at the apex. 

 New Jersey, Alabama, and Florida, West Indies, Mexico, South America. 

 Specimens examined. — New Jersey/: Camden, Martindale 1879, on "ballast." Alabama: 

 Mobile, Mohr 1891, on "bailast." Florida: Key West, Blodgett. West Indies: 

 St. Croix, 67 Ricksecker 1895. 



Fig. 23. — Choetochloa caudata: a, brauch showing spikelet and 

 setae ; b, view of the spikelet ; c, flowering glume, dorsal view. 



