288 POACE.E. 



Var. Hookeri (Trin.) Vascy. T7//>« llookeri Trin. Fund. 

 Agrost. 1:84 (IS-,H)). 



Bladi'S of sterile shoots G-15 cm. long, first glume 1.5 mm. 

 long, sccoml '~J-l*.5 mm. long, llorul glume 3.5—1 mm. long. 



Mississi])])!, r. S. Dcpt. Ayrirul. from Jolmson. 



4. S. flliculmifl (Thurb.) Nusey, Cat. Grasses U. S. 44 (188')). 

 Vilfa jUicuhn is Tiiurb. 



A very tjlonder tufted perennial, 15-20 cm. high, coming froui 

 stout rootstocks. Some of the sheaths sliorter than the iuternodes; 

 ligulo about 1 mm. long; blades of sterile shoots strongly involute, 

 recurved, 1t-~ cm. long, those of the culm 3-4 in number, mucro- 

 nate. Panicle terminal, much exserted, narrow, spikelike, inter- 

 rupted, 3-5 cm. long. Empty glumes equal, 1-nerved, ovate-lance- 

 olate, 3 mm. long; floral glume thinly pubescent on the lower 

 half, lanceolate, cuspidate, 3-nerved, 4-4.5 mm. long; palea thju)} 

 pubescent on the lower half, linear, nearly as long as its glume. 



New ^Mexico, Scrihner, from Thurber, collected on the Whipple 

 expedition Sept. 1853. A note by Munro with specimen reads: 

 " A good species, very close to V. faxtitjiata, principally differing 

 in size and having a hairy palea, in Avhicli resjiccts it appi'oaches 

 V. vuspidata.^' 



Texas, New Mexico. 



5. S. brevifolius (Nutt.) Scribn. Mem. Torr. Club, 5:105 

 (1894). Agrostis Am'//b//« Nutt. Gen. 1: 44 (1818). Vilfa nis- 

 pidata Torr.; Hook. Flor. Bor. Am. 2: 238 (1840). S. cnspidatiis 

 AVood, Am. Bot. i!fc Flor. 385 (1871). 



A very slender nearly smooth branching perennial, 30-40 cm. 

 high, often with stout rootstocks. Sheaths two-thirds as long as 

 the internodes; ligule very short; blades not over 3-4 cm. long, 

 those of the culm 5-6 in number, erect, involute, filiform, 3-8 cm. 

 long. Panicle terminal, interrupted, partially included by the upper 

 slieath, consisting of 4-G slightly overlapping spikelike branches, 

 2-5 cm. long, or in small plants reduced to a slender spike 3-5 cm. 

 long. Empty glumes subequal, 1-nerved, ovate-lanceolate, 1-3 

 mm. long, floret with a callus; floral glume dark brown, slightly 

 pubescent under a lens, lanceolate, 3-nerved, the lateral nerves ob- 



