51 



second S-nerved witli transverse veins. Apex irregularly toothed, the teeth 



sometimes short awn-pointed. Glumes of the female tloret 4 mm. long, reach- 

 ing the base of the first stamiuate floret, terminating in a slender awn, 10 to 12 



mm. in length. Staminate floret about 3 mm. long. 

 Wet mountain canyons near Cuernavaca, State of Morelos, Mexico (No. 7774, C. G. 



Pringle, November 0, 1896), altitude 1,900 meters. 

 In habit this species resembles Zeugites me.ricana Trin.. but is at once distinguished 



by its broader leaves, and awned glumes of the female florets. I have been 



unable to compare this 



speeies with Zcui/iies 



amer'uaiux Willd., but it 



difiers from the descrip- 

 tion of that species in its 



much longer awn. The 



awn of ZeugiUs americana 



of the West Indies is 



described as being only 



about one-half the length 



of the glume, while in 



Z. pringlei the straight 



awn is 2 to 3 times the 



length of the glume. 



ERAGROSTIS VISCOSA 



Scribn.. sp. n. i^Tl. VII.) 



A slender, somewhat wiry 



perennial with erect, 



mauy-joiuted culms, 3 to 



4 dm. high, narrow, in- 

 volute (at least when 



dry) leaves and diftuse 



panicles 6 to 12 cm. loug. 



Sheaths mostly longer 



than the iuternodes and 



overlap]) iug, viscid, 



pilose aloug the margins, 



at least near the apex, 



aud bearded at the throat. 



Ligule a very short fringe 



of hairs. Leaf-blades 4 



to 10 cm. long, 2 to 4 



mm. wide, strongly invo- j.,,; g _ 



lute Avheu dry, scabrous 



above, smooth beneath. 



Axis of panicle and its branehes visci<l, somewhat rigid, tho branches finally 



spreading or divergent. Spikelets 3 to 4 mm. long, 3- to 5-tiowered. ai>pres8ed 



to the rachis, and excepting the terminal ones, nearly sessile. Empty glumes 



acute, subeijual, scabrous on the keels; flowering glumes narrowly oblong, 



obtuse, strongly 3-nerved aud scabrous on the keels. Palea a little shorter than 



the glume, arcuate below, acnleolatt^-scabrous on the keels above. 

 Midland, Tex. (J. G. Smith, August 2, 1897). Laredo, Tex. (Mrs. Anna B. Nickels). 



It is remarkable for being viscid throughout. 



POA CAPILLARIS Scribn., sp.n. (Fig. 11.) 



A slender, ercit. deusely-ca'S])itos<' perennial. 3 to 1 dm.higli. with almost capillary 

 aud flexuous basal leaves aud loug-exserted densely-flowered panicles, 3 to 5 cm. 



-Trixelum argenteum Srribn. : «, empty 

 tlorets, seeu from tlio sido. 



jliimes: h, two 



