146 



This grass is referred to Deyeuxia varia^ Kth., with some hesita- 

 tion, no authentic specimens being at hand for comparison; but there 

 is little of importance in the description of that species to exclude 

 it. Kunth^s characters, where he says : ''pilis corollam aequantibus 

 vel duplo breinoribiis ; arista dorsali genictilaia, calycem vtx excedente,'' 

 describe it exactly. 



It differs from D, sylvatica in its taller and more slender habit, 

 shorter and less acuminate empty glumes, shorter awns and longer 

 palea, which is similar in texture to its glume. From Deyeuxia 

 stricta, as described by American authors, it differs in its twisted and 

 geniculate awn, shorter and more scanty basal hairs and larger and 

 firmer palea. 



It is very near No. 3 of Bolander's small collection, and 1,089 of 



Kellogg & Harford, and appears to be identical with one of the 



forms (there are two forms among the specimens in hand) included 

 under No. 653 A. of PowelFs collection, 1868. 



48. Descha7npsia elongata^ Munro, in Benth. Plant. Hartweg, 342; 

 Aira elongata^ Hook,, Fl. Bor. Am., ii., 243.1;. 228; Thurber, Bot. 

 Cab, ii., 297. 



Strawberry Valley, California. August. 



49. Trisetttm canescens^ Buckley, Proc. Acad. Phil., 1862, p. 100; 

 Thurber, Bot. Cal., ii., p. 296, 



Mt. Shasta. Alt., 6,000 ft. August. 



50. Trisetum suhspicatmn^ Beauv. Thurber, Bot. Cal., ii., p. 296 

 Mt. Shasta. Alt., 7,500 feet. August. 



5 1- Avena fatuay Linn. Thurber, Bot. Cab, ii., 295. 



Santa Cruz Valley, near Tucson. 



This grass is occasionally found on the ''ballast" grounds at 

 Philadelphia. 



52. Danthonia Californica^ Bolander, Proc. Cal. Acad., ii., 182; 

 Thurber, Bot. Cal., ii., p. 294. 



Mountains about the head-waters of the Sacramento River. Alt., 

 7,000 feet. August. 



53*. Chloris alba, Presl. Vasey, Bot. Wheeler Exped., p. ^Z^'i 

 Torrey, in Emory's Report, etc. 



Santa Cruz Valley, near Tucson, Arizona, June, 



54. Trichloris (.?) Blanchardiana^ Fournier. Chloridiopsis Blan- 

 chardianUy J. Gay, in herb. 



Culms stout and leafy, about 2 ft. high; sheaths compressed, 

 keeled, hairy on the edges, especially near the throat; upper surface 

 of the conduplicate leaf hairy near the base. Spikes slender, 

 numerous — a dozen or more — 3-4 in. long, arranged in a terminal 

 fascicle. Spikelets with one 3-awned perfect flower and a stipitate, 

 3-awned rudiment. A second rudimentary floret is sometimes present. 



Santa Cruz Valley, near Tucson. May. 



or Chlor- 



gle's sets. The 



This grass has been distributed in herbaria as Chloropsis 

 idiopsis Blanchardiana, Gay, and is so named in Pringle's s 

 generic name here adopted is based upon the following note in Ben- 

 tham's 'Notes on Gramineae:* 'The genus Trichloris, Fournier, 

 comprises two Mexican and two extra-tropical South American 

 species. They resemble Trisetaria in the dense oblong crinate 



