Ericameria. composite. 237 



With the preceding ; the flowers larger and not perfectly yellow (ochro- 

 leucous) ; the branches more slender and open ; the leaves somewhat longer 

 and a little broader; the rays often, but not always bilabiate, with 2 strap- 

 shaped narrow segments opposed to the 2-toothed ligiile. Nuitall. — Pappus 

 in a single series, the capillary bristles nearly all equal. 



45. STENOTUS. Nutt. in trans. Amer. jjhil. soc. (n. ser.) 7. p. 334. 



Heads many-flowered; the ray-flowers 8-12, ligulate, rather distant, pistil- 

 late; those of the disk tubular, perfect. Scales of the hemispherical involu- 

 cre few, oblong-ovate or orbicular, 1-nerved, membranaceous (rarely coria- 

 ceous) with scarious margins, closely appressed and regularly imbricated in 

 2-3 series. Receptacle flat, alveolate-toothed. Rays oval or oblong. Co- 

 rolla of the disk dilated towards the summit, deeply 5-toothed. Appendages 

 of the style broad and flat, with the pubescent appendages various in form. 

 Achenia oblong-turbinate, densely silky-villous. Pappus of numerous soft 

 unequal densely scabrous capillary bristles, commonly bright white. — Dwarf 

 suffrulescent plants of alpine aspect (natives of the Rocky Mountains, &c.), 

 densely cfespitose, of a cinereous hue, or sometimes covered with a resinous 

 exudation, the fastigiate stems or scapes numerous from the ligneous branch- 

 ing caudex, terminated by showy heads (large for the size of the plant). 

 Leaves linear or lanceolate, 1-3-nerved, rigid, persistent, entire, alternate or 

 crowded. Flowers bright yellow. 



A group of plants well marked in habit, and doubtless generically distinct from 

 the true Aplopappus. 



§ 1. Floivering stems or scapes somewhat simi^le and naked, hearing single 

 heads : leaves cinereous : rays 10-12 : pappus and silky hairs of the ache- 

 nia bright white, 



1. <S. acaidis (Nutt.! 1. c.) : leaves clustered at the summit of the thick 

 branched caudex, spatulate-ianceolate, raucronate-acute, somewhat 3-nerved, 

 minutely hispid-scabrous; scapes nearly leafless ; scales of the nearly jrla- 

 brous involucre short, oblong-ovale, acute, chartaceous, with scarious mar- 

 gins, somewhat in 2 series; rays short, often 2-cleft ; appendages of the style 

 in the disk-flowers subulate-linear, longer and narrower tl/an the stigmatic 

 portion. — Chrysopsis acaulis, Nutt..' in jour, cicad. Philad. 7. p. 33, t. 3, /. 1. 



Borders of Little Godin River in the Rocky Mountains, towards the sour- 

 ces of the Oregon, Mr. Wycth! June. — "A small, tufted alpine, only 3-4 

 inches high." Leaves scarcely an inch long ; those of the simple scape 1-2 

 and much smaller, or none. 



2. S. pygmceus: very dwarf; leaves spatulate, obtuse, somewhat 3-nerved, 

 fimbriate-ciliate; the radical as long as the simple leafy scape ; head brac- 

 teate ; scales of the involucre oblong, obtuse, ciliate, rather rigid ; rays 

 oblong-linear. 



Rocky Mountains, probably in about lat. 41°, Dr. James! — Scarcely 2 

 inches^ high, slightly cinereous. Ovaries hairy. Style, &c. as in the 

 preceding. 



3. S. armerioides {'HwXi.\ I.e.): glabrous; leaves crowded at the summit 

 of the thick woody caudex, elongated spatulate-linear, obscurely 3-nerved ; 



