Report of the exploring expedition to the Rocky Mountains in the year 1842, and to Oregon and north California in the years 1843-44 . filaments short; anthers ovate-sagittate. Ovaries oblong, united below, distinct above, smooth; styleslender; stigma capitate, with a membranaceous collar at the base. The specimens of this plant were without tickets; but they were proba-bly collected west of the Rocky mountains. They were without fruit. Asclepias speciosa. Torr. in Ann. Lye. New York, \\,p. 218. This (as was stated in the first report) is Jl. Douglasii of Hooker, wellfigured in his Flora Boreal
Report of the exploring expedition to the Rocky Mountains in the year 1842, and to Oregon and north California in the years 1843-44 . filaments short; anthers ovate-sagittate. Ovaries oblong, united below, distinct above, smooth; styleslender; stigma capitate, with a membranaceous collar at the base. The specimens of this plant were without tickets; but they were proba-bly collected west of the Rocky mountains. They were without fruit. Asclepias speciosa. Torr. in Ann. Lye. New York, \\,p. 218. This (as was stated in the first report) is Jl. Douglasii of Hooker, wellfigured in his Flora Boreali Americana, 2, t. 142. It has a wide range, be-ing found on both sides of the Rocky mountains, and from the sources ofthe St. Peters to those of the Kansas and Canadian. The fruit was collect-ed from specimens on the banks of the Snake river. It is almost exactlylike that of A. Cornuti, being inflated, woolly, and covered with soft spines. * It should be stated here, that the notice of this genus by Dr. Gray was drawn up in Latin; bulwe have given it in English, that it may be uniform with our own descriptions. IIOTWY Watt Li. IitHTivE/Wber i Co Jaltimjre i <ei m wet, tee lej eeth 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 terminalpeduncle, 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 aspan high. Leaves about an inch and a half long, and more than an inchwide. Flowers few, very large, apparently yellowish. Fruit not seen. Eriogonum inflatum. Torr. and Frem. Smooth, bi-trichotomous; the lower part, and sometimes the two primarydivisions of the stem, much inflated and clavate; peduncles divaricatelybranched, the ultimate divisions filiform and solitary; in
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