ACADEMY OF SCIENCES. 169 



acute, smooth. Leaves erect, liuear, smooth, invokite, four to ten iuclies long. 

 Panicle erect, open, fusiform. Lower and uppermost branches appressed ; cen- 

 tral, moderately spreading ; two — rarely three — in a whorl ; subdivisions in 

 threes ; few-flowered, scabrous. Pedicles about the length of the erect spike- 

 lets. Spikelets four lines long; glumes equal, ovate — lanceolate, acuminate, 

 bristle-pointed, exceeding the palet one-eighth of an inch ; lower distinctly 

 three — upper three to five-nerved, scabrous at the nerves. Lower palet two 

 lines long, oblong or fusiform ; coriaceous, doited, fuscous, densely silky pu- 

 bescent ; upper but little shorter, oblong, boat-shaped, blunt at the hyalinous 

 apex, silky pubescent in the centre. Awn one-half to three-fourths of an inch 

 long, twisted below and bent at about the middle ; below the bend pubescent, 

 above scabrous, articulate. Stamens three. Anthers a line long, bearded at 

 the deeply two-cleft apex ; the feathery stigmas short and densely crowded. 



Sandy soil. Bloody Caiion, near Mono Lake, and also near Sonora Pass. 

 September (1866). 



This s[)ecies is closely allied to St. Bertrandi Ph., yet quite distinct. 



This beautiful species may most appropriately and deservedly bear Mr. H.G. 

 Bloomer's name, and commemorate his services to Botany on this Western 

 coast. 



4. Stipa chrysophylla Desv. — Dry, sandy soil. Bloody Canon, near Mono 

 Lake. 



5. Stipa occideniaUs 'Ihurb. — A very variable species, of wide range over our 

 western mountains. On loose, sandy soil, at four to five thousand feet altitude. 

 Ii obtains a height of three to four feet, and assumes a reed-like appearance ; 

 but becomes very much reduced in size at high elevations and rocky exposi- 

 tions. The small and reduced specimens bear bearded awns, while those of 

 larger size bear awns almost entirely smooth. This species is much esteemed by 

 sheep-growers. 



6. Stipa viridula Trin. — In various places on the northern Coast Ranges 

 and the Middle Sierras. From three to five feet in height. 



7. Stipa comata Tnn. — On sandy soil. Bloody Canon, near Mono Lake. 



8. Stipa [Lasiagrostis) StiUmanii Bol. [Sp. noi;).— Root perennial, almost 

 woody ; fibres tomentose. Culms ca^spitose, erect, terete ; three to five feet 

 high, glaucous, smooth, (four and five leaved). Nodes pubescent. Sheaths stri- 

 ate, smooth, somewhat inflated, bearded at the top, all save the lowest ; much 

 shorter than their iaternodes. Ligules very minute. Cauline leaves distichous, 

 linear-lanceolate ; fourteen to eighteen inches long, and one-quarter of an inch 

 wide ; smooth above, retrorsely scabrous below and at the margins. Stem leaves 

 shorter ; the uppermost very much reduced in size. 



Panicle erect, linear oblong, contracted ; interrupted below and dense above ; 

 sis to ten inches long. Branchlets in fives, threes and twos ; very short, une- 

 qual ; one or few-flowered ; appressed. Glumes six to seven-eighths of an inch 

 long, equal, lanceolate, acuminate and bristle-pointed ; hyalinous, white ; lower 

 three-nerved (closely at the base)— upper five-nerved ; all nerves save the ex- 

 current scabrous middle evanescent. Palets one-third shorter than the glumes ; 

 nearly equal, chartaceous, pubescent, especially at the short obconical callus. 



