317 [ 174 ] 



Acerates latifolia. Torr. and Frem. 



Stem simple, erect, smooth ; leaves roundish-ovate, nearly sessile, obtuse, 

 with a small mucro, smooth on both sides ; umbel solitary, on a terminal 

 peduncle, few-flowered ; pedicels slender ; segments of the corolla ovate- 

 lanceolate; lobes of the crown semilunar-ovate, as long as the column, 

 rather obtuse, cucullate. 



On Green river, a tributary of the Colorado of the West ; June. About a 

 span high. Leaves about an inch and a half long, and more than an inch 

 wide. Flowers few, very large, apparently yellowish,. Fruit not seen. 



Eriogonum inflatum. Torr. and Frem. 



Smooth, bi-trichotomous ; the lower part, and sometimes the two primary 

 divisions of the stem, much inflated and clavate ; peduncles divaricately 

 branched, the ultimate divisions filiform and solitary ; involucre few-flow- 

 ered, smooth; the teeth equal, erect. 



The specimens of this plant are imperfect, being destitute of leaves, 

 which are probably wholly radical. It is a foot or more high. The first 

 joint of the stem, or rather scape, is remarkably dilated and fistular up- 

 ward. This divides into three or more branches, the two primary ones of 

 which are sometimes inflated like the first ; the subdivisions are dichoto- 

 mous, with a pedicellate involucre in each fork. The involucres are about 

 a line in diameter, smooth, 5 — 6-flowered ; and, in all the specimens that I 

 examined, only 5-toothed. The plant was found on barren hills in the 

 lower part of North California. 



Eriogonum reniforme. Torr. and Frem. 



Annual ; leaves radical, on long petioles, reniform, clothed with a dense 

 hoary tomentum ; stem scape-like, naked, 3-forked from the base, glaucous, 

 and nearly smooth ; the divisions divaricately 2 — 3-forked ; involucres 2 — 4 

 together, on slender peduncles, smooth, campanulate, 5-toothed, the teeth 

 nearly equal, obtuse ; perigonium smooth. 



On the Sacramento river; March. Allied to E. vimineum of Bentham. 

 A small species, with very minute flowers. 



Eriogonum cordalum. Torr. and Frem. 



Annual; leaves all radical, on long petioles, round^h-ovate, cordate, 

 very obtuse, slightly pubescent above, hairy underneath ; scape naked, 

 slender, smooth and glaneous, divaricately branched, the divisions slender; 

 involucres solitary, on filiform peduncles, campanulate, smooth, 5-toothed, 

 the teeth nearly equal, rather obtuse ; perigonium hairy. 



With the preceding, from which it is easily distinguished by the form of 

 its leaves and color of the pubescence. 



Many other species of this genus were collected in California and the 

 Snake country, some of which are probably new, and will be described in 

 the next report. 



Fremontia vermicular is. Torr. in Fr6m. 1st report. 



This curious plant is always found in saline soils, or where the atmo- 

 sphere is saline. Its greatest height is eight feet. It is a characteristic fea- 

 ture of the vegetation throughout a great part of Oregon and North Cali- 

 fornia. About Brown's Hole, on Green river, it occupies almost exclusively 

 the bottoms of the neighboring streams. It is abundant also on the shores 



