Report of the exploring expedition to the Rocky Mountains in the year 1842, and to Oregon and north California in the years 1843-44 . -winged,closed, minutely 2-toothed at the summit; the wings veined and irregularlytoothed. Utricle very thin and membranaceous, free. Seed ovate, some-what compressed; the podosperm lateral and very distinct, rostrate up-ward. Integument double, the exterior somewhat coriaceous, brownish,the inner one thin. Embryo nearly a circle, surrounding copious mealyalbumen. Pterochiton occidentale. Torr. and Frem. An unarmed shrub, 1—2 feet high, with numerous slender bra
Report of the exploring expedition to the Rocky Mountains in the year 1842, and to Oregon and north California in the years 1843-44 . -winged,closed, minutely 2-toothed at the summit; the wings veined and irregularlytoothed. Utricle very thin and membranaceous, free. Seed ovate, some-what compressed; the podosperm lateral and very distinct, rostrate up-ward. Integument double, the exterior somewhat coriaceous, brownish,the inner one thin. Embryo nearly a circle, surrounding copious mealyalbumen. Pterochiton occidentale. Torr. and Frem. An unarmed shrub, 1—2 feet high, with numerous slender branches,which are clothed with a grayish nearly smooth bark. Leaves alternateor fasciculate, linear oblanceolate, narrowed at the base, flat, entire, coveredwith a whitish mealy crust. Flowers somewhat racemose, on short pedi-cels. Fructiferous calyx, with the wings 2—3 lines wide, semi-orbicular,coriaceo-membranaceous, mealy like the leaves,strongly veined; the mar-gin more or less toothed. Utricle free from the indurated cavity of theperianth, extremely thin and transparent. Seed conformed to the utricle • BOTANY Plate /!. TheTSTuI fine 319 [ 174 ] , the conspicuous podosperm passing along its side ; the beak pointing ob-liquely upward. This is one of the numerous shrubby plants of the Chenopodiaceousfamily that constitute a large part of the vegetation in the saline soils ofthe west. The precise locality of this plant we cannot indicate, as the labelwas iffegible; but it was probably from the borders of the Great Salt is allied to Grayia of Hooker and Arnott, a shrub of the same family,which was found in several places on both sides of the Rocky mountains,often in great abundance. Pinus monophyllus. Fran. (The nut pine.) Leaves solitary, or very rarely in pairs, with scarcely any sheaths, , somewhat pungent; cones ovoid, the scales with a thick obtuselypyramidal and protuberant summit, unarmed ; seeds large, without a wing. A tree with vert
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Keywords: ., bookauthorunitedstatesarmycorps, bookcentury1800, bookdecade1840
