306 DESCRIPTIONS OF NEW SPECIES 



pressed, flat, oblanceolate, marginate, the disk glandularly pubescent. — 

 Dwarf alpine annuals, with depressed, divaricate stems, branching from the 

 base. Strigosely and canescently pubescent; leaves linear, entire. Flowers 

 sessile, terminal, somewhat corymbose, large for the size of the plant. Invo- 

 lucrum imbricate, scales lanceolate, membranous on the margin, which is 

 lacerately ciliate. Rays longer than the disk, lilac, or rose-purple. Some- 

 times presenting a rudimentary style, but the achenium always imperfect. 



Townsendia ^ strigosa; stem depressed, branching from the base; flowers 

 fastigiate, subcorymbose ; leaves linear-spathulate, much attenuated below; se- 

 pals lanceolate-ovate. 



Hab. On the Black Hills, (or eastern chain of the Rocky Mountains,) near the banks of the 

 Platte. — Flowering- in June. Rather softly strigose, with short, appressed, whitish hairs. From 

 two to four inches high, the branches spreading, dividing usually into a sort of leafy corymb of 

 sessile flowers, from one to five on a forked branch. Capitulum the size of the common daisy, 

 with much the aspect of an Aster, but the sepals all erect, closely imbricated, broadly membranous 

 and lacerate on the margin. Rays twelve to fourteen, rose-red; discal florets pale yellow. Stigmas 

 acuminate, somewhat pubescent, scarcely at all exserted. 



Townsendia * grandijlora; stem canescent, divaricately branching from the 

 base, branches one or few-flowered, leaves linear-sublanceolate, very acute, 

 nearly smooth, or minutely pubescent, green; capitulum hemispherical; invo- 

 lucrum of three series, the sepals lanceolate, filiformly acuminate, minutely 

 fringed; rays twenty-eight to thirty, or more, bidentate. 



Hab. With the preceding, which it resembles wholly in habit, but with the flower as large 

 nearly as that of the China Aster, (^Callistephus Chinensis.) Branching from the base, and spread- 

 ing out sometimes from six to ten inches along the ground. Leaves linear, much attenuated below, 

 and very acute, when green rather succulent, and appearing smooth, though somewhat pubescent 

 beneath, (seen through a glass.) Sepals elegantly imbricated, perfectly lanceolate, much acumi- 

 nated, scariose, except the centre, which is green, the margin minutely lacerate-ciliate. Rays pale 

 lilac, longer than the disk.— A plant which well deserves cultivation, from its large, showy flowers. 



ERIGERON. (Linn.) 



§. Pappus mostly single, or with the external, very minute, rays numerous. 



Erigeron glahellum. — Rocky Mountain plains. Radical leaves sometimes 

 more or less serrate. Pappus rather long and persistent, single, of about twenty- 



