VOL. IV.] Lower California Grasses. 389 



^ 30. Aristida bromoides HBK. Kmpty glumes unequal, 

 the first 2-3 lines long, acute, the second 3>^-4 lines, acute or 

 obtuse, both i -nerved. Floret about the length of the second 

 glume. Awns subequal, 2^-5 lines long, lateral awns slightly 

 divergent. Callus densely barbate. Culms slender, branched, 

 6-12 inches high, with a narrow strict panicle 2-5 inches long. 

 — Saucito, October 15 (66). 



X 31. Aristida Schiedeana Trin. First empty glume lan- 



ceolate, acute, 3^-4^ lines long, strongly aculeolate scabrous 

 on the keel for the entire length ; second glume a little longer 

 than the first, i -nerved, obtuse or shortly bifid at apex, the 

 smooth midnerve projecting as a short mucro between the lobes; 

 flowering glume with a slender and acute barbate callus nearly 

 ^ line long, the glume 6-7 lines long, with an awn 2 lines long, 

 the lateral awns minute. Panicle 6-10 inches long, branches 2-4 

 inches, solitary or in pairs, rather rigid, widely spreading, with 

 appressed spikelets above the middle, naked below. Culms 1-2 

 feet high, rather slender. — Saucito, October 15 (64). 



32. Aristida Cai^ifornica Thurber. — San Jose del Cabo., 

 September 12 (38). 



32a. Aristida scabra Kunth, Sttepiachne scabra HBK. 

 Ortachne scabra Fourn. — El Taste, September 11 (26). 

 \^ 33. Oryzopsis fimbriata Hemsl. Stipa fimbriata HBK. 



Empty glumes about 2^ lines long, equaling or slightly exceed- 

 ing the obovate obtuse and pilose flowering glume, shortly mucro- 

 nate pointed. Awn of the flowering glume about 7^2 lines long, 

 once or twice geniculate, strongly twisted below, scabrous. 

 Callus very short, acute, barbate. First glume 5-nerved, the 

 second 3-nerved. Radical leaves involute filiform, about a foot 

 long, shorter than the culm. — La Chuparosa, October ry (72). 



/ 34. MUHLENBERGIA LAXIFLORA Scribn.=No. I412 C. G. 



Pringle (1887). Empty glumes about 34 line long, subequal, 

 obtuse; flowering glume 2 lines long narrow-lanceolate, 3-nerved, 

 2-toothed at the obtuse apex awned; awn 1-2 lines long. Callus 

 barbate. Culms 2-3 feet high, simple, panicle narrow, elongated, 

 dark purple. Perennial from a stout root-stock. — Ea Chuparosa, 

 October 17 (74). 



