182 



Danthonia Calif ornica (California Wild Oat Grass). — Sj.ikclets 

 5-10-flowered, distichous, imbricated, the uppermost abortive, one- 

 half to three-cjuarters of an inch long. 



Glumes two, nearly etpial, mem])ranaceous, lanceolate, 4-5- 

 nerved, pointed, hyaline-margined, as long as the flowers or nearly 

 so, tinged with purple, persistent. 



Pale?e two ; lower, broadly ovate-oblong, round on the back, 

 smooth, chartaceous, bearing between the sharp-pointed or awn-like 

 teeth (half of the palea long) of the tip a flattish and spirally- 

 twisted awn (about the length of the palea), a tuft of silky hairs at 

 the base, and on each side of the margins, about the middle, many 

 striate-nerved ; upper, lanceolate, bicarinate, ciliate-hairy on the 

 two nerves, obtusely-pointed, fully as long as the lower palea, mem- 

 branaceous. 



Ovary stalked, subpyriform, concave at the apex, glabrous ; 

 styles two, terminal, distant and divergent ; stigmas plumose, fully 

 twice the length of the ovary (iiilis) denticulate ; stamens three ; 

 anthers dark purple ; squamulie two, broadly wedge-shaped, either 

 undulate-sinuate or unequally repand at the ajjcx, with several 

 subdivided strong veins ; caryopsis ovate-oblong, three-sixteenths of 

 an inch long and one-sixteenth wide, smooth, convex on the back, 

 slightly concave on the other, bearing two small divergent teeth at 

 the beak. 



Root perennial ; culms decumbent, many arising from the same 

 root and spreading in opposite directions, terete, smooth, striated, 

 from six inches to three feet long ; leaves linear, convolute-pointed ; 

 sheaths long and bearded at the throat ; ligula scarcely visible ; 

 panicle simple and sub-compound, spreadmg 3-7-1 0-flowered, 

 branchlets scabrous. 



Habitat : On borders of cultivated fields near the bay at Oak- 

 land ; hills near Mission Dolores, San Francisco. 



August 4th, 1862. 



President in the Chair. 



Dr. Kellogg read the following paper on a species of Trixis 

 brought from Cerros Island by Dr. J. A. Veatch : 



Trirls Calif ornica (Kellogg). Fig. 53. 



Stem slirubby, branches spreading, branchlets purf)lish, appressed 

 pubescent with short white hairs, also glandular and stipitate glandu- 

 lar ; bark light ashy hue below. 



