FESTUCE.E, 635 



drooping, the longest 4-7 cm. long, bearing a few spikelets on the 

 outer third or quarter. Spikelcts 5-6 mm. long, 3-5-llowerod, 

 linear or oval, pale green, often tinged with purple, joint of 

 rachilla about 1 mm. long; empty glumes acute, first lanceolate, 

 1-nerved, 3.2 mm. long, second oval-lanceoLito, 3-ncrved, 3.7-4.3 

 nmi. long; lloral glume 4 nmi. long, thin, oval, erose-obtuse, the 

 u})j)er t'lird scarious, pubescent on the marginal nerves and on the 

 lower three-fiftlis of the keel; i)alea linear, about 3 mm. long, 

 scabrid on the keels. 



Delaware, Canhy; Pennsylvania (Phila.) Srribner 1; Tennes- 

 see (Knoxville), Srvibnor. 



Hocky or hilly woodlands, Pennsylvania to Virginia and siiar- 

 ingly westward, 



9. P. arachnifera Torr. Marcy, Exp. Ked IJiv. of La. 301 

 (1853). 1\ (U'ltsijlom Jiuckl. Proc. Acad. Pliila. OG (1803). 

 Texas Blik Gkass. 



A light green grass, 30-00 cm. high, witli an al)undance of 

 creeping rootstocks. Leaves of sterile shoots numerous atid long, 

 those of the culm 3 in numl)er, ligule 1 mm. long; blades flat 

 or involute, scabrous or smooth, 10-20 cm. long, 4-G mm. wide, 

 pungent-pointed. Panicle contracted, linear or oblong, 8-16 cm. 

 long, rays in threes to fives, erect, the longest 4-6 cm. long, bearing 

 bunches of spikelets from near the base to the apex. Spikelcts 

 oval, 5-6 mm. long, 4-5-ilowered, joint of rachilla O.G mm. long,, 

 empty glumes acute, scal)rid on the keels, first lanceolate, 1-nerved, 

 2-5 mm. long, second oval-lanceolate, 3-nerved, 3-3.3 mm. long; 

 floral glume 3.5-4 mm. long, thin, copiously webbed at base, moro 

 or less pubescent on tlie lateral nerves and the lower half of the keel, 

 oval, acute, or almost muerouate, the lateral nerves obscure and ex- 

 tending two- thirds of the way to the apex; palea linear, 3.2 mm. long. 



Mississippi, Trncij; Kansas, KeUcrmaniij Texas, lieverchoii for 

 U. S. Dept. Agricul, 633, Nenlley. 



Texas to Xew Mexico. See Vol. L 143, Fig. 69, 



Var glabrata Vasey, Cat, Grass. U. S. 79 (1885). Floral 

 glumes shorter, glabrous, and destitute of webbed hairs. Found 

 with the species. 



