OF ARTS AND SCIENCES. 123 



— Culms 12 to 18 inches high, with long involute erect leaves, and 

 a short lax panicle: spikelets sometimes 2-, very rarely 3-flowered, 

 3-3 J- lines long; empty glumes lanceolate, acuminate; flowering glume 

 broadly lanceolate, pilose all over, laciniate at apex: awn from near 

 the middle on the back, 2-3 lines long, bent and a little twisted be- 

 low; rudiment nearly half as long as the floret, pilose ; hairs on callus 

 short, one fifth as long as the glume. — Mt. Orizaba, 14,000 t't.» 

 August (no. 227 a). 



Tjrisetum eloxgatum, Kuuth, Gram. I. 101, Enum. PL I. 296. 

 This appears to be the same as T. interruptum, Buckley, and is 

 probably the T. interruptum of Fournier. — Mt. Orizaba, L 2,000 ft, 

 August (no. 191). 



Tkiodia avenacea, HBK. Nov. Gen. 156, t. 48. (TJrcikph 

 avenacea, Kth. ; Fourn. Mex. PI. Enum., Gram. 110.) — Mt. Orizaba, 

 9,000 ft., August (no. 248). Equals Pringle's no. 3930 and Schaff- 

 ner's 1008. Spikelets G-8-flowered, about 4 lines long; empty glumes 

 unequal, the larger second one 2\ lines long; first flowering glume -' 

 lines long, oblong, deeply notched at apex, awned between tin' divis- 

 ions : awn about 1 line long. 



Eragrostis lugens, Nees. S. Wats, in Proc. Am. Acad. XV III. 

 182. — Hill near Esperanza, 8,000 ft., August (no. 318). Equals 

 Pringle's no. 472. I have this species from Louisiana, collected in 

 cultivated fields at Lafayette by A. B. Langlois, Sept. 25, 1885. 



Festuca Tolucf.nsis, HBK. Nov. Gen. I. 153? — Mt. Orizaba, 

 12,000 ft., August (no. 193). Equals Pringle's no. 5201. This, 

 and also no. 228 of same collection, appear to me to be only varii tii - 

 of Festuca ovina, L. The no. 228 may be Fournier's F. aquipetala. 



Festuca rubra, L., var. pauciflora, Scribner, n. var. Spike- 

 lets 3-flowered : upper flower imperfect: empty glumes unequal; the 

 lower shorter and narrower: flowering glumes lanceolate, acuminate, 

 submucronately pointed, scabrous on the back. — Mt. Orizaba, 13,< 00 

 ft., August (no. 227 b). This may be F. WiUdenoviana, Schult., bat 

 it appears to be only a variety of F. rubra, L. 



Bromus Hookeri, Fourn., var. Schlechtendalii, Fourn. Mex. 

 PI. Enum., Gram. 127. — Mt. Orizaba. 10,000 ft., A.ug isl (no. I 

 Equals Pringle's no. 117:5. This has been referred to B. carin 

 Hook., but upon what authority I do not know. Hool 

 does not appear to be clearly known. 



