PLANTS COLLECTED BY DR. GAMBEL. 187 



About a span high. Leaves and sheathes minutely puberulous. Leaves short and 

 narrow. Panicle spreading; flowers very deciduous. Glumes minute, unequal 

 and obtuse, membranaceous, with from one to four nerves. Palese dark purple, the 

 lower somewhat carinate ; pilose at base, terminating in an arachnoid purple awn, 

 about an inch in length ; the upper palea also purple and indurated, its two nerves 

 often ending in two short awns. 



Hab. Santa Barbara, Upper California, and the island of Santa Catalina. 



CALAMAGROSTIS. 



§ *Trichagrostis. — Spikelets one-flowered, the flower sessile, with long hairs 

 at the base. Glumes two, subequal, membranaceous, acute, longer than the flower, 

 the lower with a short terminal awn. Palese two, very acute, the lower carinate, 

 ending in an exserted capillary awn ; the upper one-nerved, acuminate. Caryopsis 

 free, cylindric-oblong, much shorter than the glume. 



C. *ANDiNA. A simple stemmed small grass, with a compressed culm, about two or three feet high ; 

 ligules minute ; flowers in a short, paniculate, narrow spike, about three or four inches long, half an 

 inch wide, with a habit very distinct from the general character of the genus; glumes very long and 

 slender, each with about a single nerve ; very narrow and membranaceous ; one of them distinctly 

 awned, the other acuminate ; pappus copious, longer than the small flower ; no lateral rudiment of 

 another flower. 



Hab. In Upper California, on the Colorado of the West. 



FESTUCA. 



§ *Chloropsis. — Spikelets unilateral, two-flowered, or with the, third abortive ; 

 hermaphrodite, distichal. Glumes two, carinate, unequal. Paleae two, the lower 

 lanceolate, hirsute and concave, ending in a long, slender awn ; the upper bicarinate. 

 Stamens, one. Ovary sessile. Styles two, very short, with plumose stigmas. 

 Caryopsis lanceolate, smooth, concave above, nearly free. — A slender Californian 

 annual grass, with a simple filiform culm, ending in a small, nearly simple, spiked 

 panicle ; the spikelets sessile on a continuous, angular rachis, at length cernuus. So 

 closely allied to the Chlorides, that at first I imagined it would prove a species of 

 Eutriana ; it is still, however, a Fesfiica in habit. 



F. *MiCROSTACHYS. A slender pubescent grass, about a span high, upper part of the rachis simply spiked, 

 the lower part, with two or three similar branches; rachis and paleoe hirsute ; glumes, the lower three- 

 nerved, the upper one-nerved ; awn of the paleae about twice its length ; caryopsis large, filling 

 up the palea. 



Hab. Pueblo de los Angeles, Upper California. 



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