AGROSTIDE.E. 199 



A slender sniootli perennial. oU-50 em. liigli ; eulnis uuhranehed. 

 Slieatlis shorter than the internodes; ligule a ciliate ring; blades 

 of sterile shoots involute, filiform, often flexuose, 7-30 cm. long, 

 those of the culm about 3 cm. long. Panicle erect, S2)ikelike, 

 narrow, 10-15 cm. long, rays erect and nearly sessile, closely aj)- 

 pressed. Empty glumes purplish, first G-7 mm. long, second 

 10-13 mm. long; fioral glume 10-11 mm. long; awns slightly 

 united and twisted at the base, spreading, nearly equal, 25-32 mm. 

 long. 



Vasey states that this grass "Differs from A. purpvi^ea Nutt., 

 in the narrower, denser panicle, with sessile branches, smaller 

 flowers and shorter awns." 



Texas, Eeverclion 1237. 



8. A. barbata Fouru. Mex. PI. Enum. Gram. 78 (1886). A 

 scova Vasey, ined. 



A rather stout perennial, 60-90 cm. high ; culm simple, smooth 

 or pubescent. Sheaths longer than the internodes, smooth, ciliate 

 with short hairs; ligule very short; blades involute, 30 cm. long, 

 the lower setaceous, those on the culms 2-3 mm. wide. Panicle 

 narrow; lower rays 3-5 cm. below the next above. Empty glumes 

 narrow, involute, 1-nerved, first 8-10 mm. long, second as long 

 or a little longer and bifid with a short awn; floret 6-10 mm. long 

 to a twisted beak 4 mm. long; lateral awns 8-15 mm. long, the 

 central one 3-5 mm. longer. 



Mexico, Palmer 520, Frin(jh 1889, ticketed A. lanuginosa 

 Scrib. n. sp. 



9. A. Nealleyi Vasey, Contrib. U. S. Nat. Herb. 3:45 (1892). 

 A. stricia var. Kealleyi Vasey, Contrib. U. S. Herb. 1:55 

 (1890). 



A slender strict light-colored perennial, 40-60 cm. high. 

 Culms with about three nodes. Sheaths half as long as the inter- 

 nodes; ligule a mere ring, sometimes ciliate; blades smooth, invo- 

 lute-setaceous, pungent-pointed, 10-30 cm. long. Panicle spike- 

 like, very slender, interrupted, 10-30 cm. long; rays in twos, the 

 longest about 3 cm. long, bearing three spikelets. Empty glumes 

 mucronate, first about 5 mm. long, second 8 mm. long; floret 



