110 GRAMINEAE 



Locs. — Mt. Shasta, Fringle ; Castle Crag, Hitchcock 3078; Sierra Valley, Lemmon 5475; 

 Mono Lake, Bolander 6094; Yosemite Nat. Park, Bolander 6094a, 6101, Hitchcock 3213; Mt. 

 0ana, Bolander; Sequoia Nat. Park, Hitchcock 3376, 3377; San Bernardino Mts., Abrams 2906. 



Refs. — MUHLENBERGIA COMATA Thurb. ; Benth. in Jour. Linn. Soc. Bot. 19: 83. 1881. 

 Vaseya comata Thurb. in Gray, Proc. Acad. Phila. 1863: 79. 1863; Thurb. in Wats. Bot. 

 Cal. 2: 278. 1880. 



2. M. gracilis Trin. Perennial ; culms densely cespitose, erect from a short 

 decumbent rluzomatous base, smooth or scabrous above, 6 to 18 inches high; 

 sheaths smooth or scabrous; ligule 2 to 3 lines long; blades crowded at base, 

 involute, scabrous, sharp-pointed ; panicles narrow, loose, 2 to 4 inches long ; 

 glumes broad, oblong, sparsely pubescent, 1 line long, obtuse or more or less 

 erose at apex, the second ;j-toothed; lemma li/j lines long, sparselj' pubescent 

 at base and margins, gradually narrowed into a slender, more or less liexuous 

 awn y^ to % inch long. 



Dry ground, middle Sierra Nevada (Yosemite Valley, Bolander 6093; Mt. 

 Tallac, Hitchcock 3143) to Wyoming, south into Mexico. 



Refs. — MuHLENBERGiA GRACILIS Trin. Gram. Unifl. 193. 1824; Thurb. in Wats. Bot. Cal. 

 2: 277. 1880. Podosaemum gracile H.B.K. Nov. Gen. & Sp. 1 : 131. 1816. 



3. M. lemmoni Scribn. Perennial, from a creeping branching woody rhi- 

 zome; culms slender, wiry, erect or ascending, 1 to 2 feet high; blades flat or 

 somewhat involute, 1/2 to 1 line wide ; panicles narrow, interrupted, the 

 branches short ; glumes narrow, gradually acuminate, including the awn about 

 li/o lines long; lemma 1% lines long, acuminate into an awn as much as 3 

 lines long, the callus hairs rather sparse, about \'-2 as long as body of lemma. 



Deserts from southern California (Jamacha, Canby 58) to Texas and northern 

 Mexico. 



Ref. — MuHLEXBERciA LEMMONI Scribn. Contr. Nat. Herb. 1: 56. 1890. 



4. M. californica Vasey. Perennial, the base more or less creeping and rhi- 

 zomatous ; culms erect, somewhat woody below, smooth, puberuleut about 

 nodes, 1 to 2 feet high ; sheaths scaberulous, keeled ; ligule scarcely 14 line 

 long; blades flat, 2 to 3 lines wide, scabrous, usually short; panicles narrow, 

 spike-like or interrupted, 3 to 6 inches long; glumes narrow, acuminate or awn- 

 pointed, li/o to 2 lines long, scabrous on the keels; lemma about IVi; lines long, 

 scabrous, the callus hairs rather sparse, about V2 as long as lemma ; awn a line 

 long or less. 



Confined to southern California. 



Locs. — Mt. Lowe, Chase 5555; Rialto, Parish 2113; San Bernardino Mts., Parish Bros. 

 1076, 1628; San Diego, Orcutt. 



Refs. — MuHLENBEROiA CALirORNiCA Vasey, Bull. Torr. C^lub 13: 53. 1886; Abrams, Fl. Los 

 Ang. 32. 1904. M. glomerata Trin. var. Irevifolia Vasey, Bot. Gaz. 7: 92. 1882, type Parish 

 Bros. 1028. M. iiarishii Vasey, Bull. Torr. Club 13: 53. 1886, type Parish Bros. 1076 (the 

 glumes extended into awns % line long). M. sylvatica Torr. var. californica Vasey, Bot. Gaz. 

 7: 93, 1882, type Parish Bros. 1076. 



5. M. microsperma Trin. Annual, often purple ; culms spreading, 6 to 15 

 inches high, scaberulous especially below the nodes; sheaths smooth or sca- 

 berulous; ligule I/O line long; blades 1 to 2 inches long, % line wide, flat, 

 scabrous; panicles narrow, loose. 1 to 3 inches long; glumes ovate, obtuse or 

 emarginate, 1-nerved, luiequal, the second the longer, i/o line long; lemma 

 narrow, acuminate, 3-nerved, IV2 lines long, appressed-pubescent on margins 

 and callus; awn terminal, capillary, 5 to 7 lines long. — Cleistogamous spike- 

 lets are developed at the base of the lower .sheaths. These are solitary or few 

 in a fascicle in each axil, each spikelet included in the indurated thickened, 



