378 PROCEEDINGS OP THE AMERICAN ACADEMY 



Trillium rivale. Stems slender, 2 to 8 inches higli : leaves lan- 

 ceolate, rounded or subcordate at base, acute or acuminate, 1 or 2 

 inches long, on petioles 1 to 15 lines long : pedicel slender, suberect or 

 at length declinate, a little shorter than the leaves : petals subrhombic, 

 acute or acuminate, 6 to 12 lines long, white or more or less marked 

 with purple : stamens exceeding the short stigmas, the filaments adnate 

 to the ovary at base, about equalling the anthers: ovary attenuate 

 above ; capsule globose, sliglitly if at all angled, nearly a half-inch ip 

 diameter, beaked by the short style. — On stream-banks in the Siskiyou 

 Mountains, California, and Coast Ranges of Southwestern Oregon. 

 Collected in 1880 by W. II. Shockley at Big Flat, thirty miles east of 

 Crescent City, and by Thomas Howell in June, 1884. It is allied to 

 the eastern T. nivale^ which it much resembles in habit. 



PiCEA Breweuiaxa. Branches slender, often elongated and 

 pendent, puberulent : leaves 5 to 12 lines long, \ to nearly one line 

 wide, strictly sessile upon the slender base, obtuse, smooth and rounded 

 or slightly caririate above, stomatose beneath on each side of the 

 slightly prominent midnerve : cones 3 inches long, narrowly cylindri- 

 cal, attenuate at base ; bracts linear-oblong (2 lines long), a fourth of 

 the length of the puberulent scale, which is obovate with the rounded 

 thickish summit entire : seed 1 .V lines long, the wing 4 lines lonjj 

 by 2^ broad. — This unusually distinct species has been found (by 

 Thomas Tlowell, in June, 1884) only at high elevations in the Sis- 

 kiyou Mountains, California, on the head-waters of the Illinois River, 

 in rather dry rocky ground. It grows to a height of from 100 to 150 

 feet, and a diameter of 1 to o feet. Bark reddish. The specific name 

 is given in compliment to Prof. W. PI. Brewer, who in connection 

 with the California State Geological Survey had so much to do with 

 the botany of the State, both in the field and in the after disposal of the 

 collections of the Survey. As he took especial interest in the trees of 

 the coast, and collected a large amount of material for their study, it is 

 fitting thus to connect his name with the forest trees of California. 



