AND GENERA. OF PLANTS. 319 



cent, in the ray smooth. Receptacle naked, alveolate, dentate. Involucrum 

 imbricate, the inner scales membranaceous on the margin, below passing in- 

 sensibly into the minute leaves of the branchlet. Achenium smooth, or 

 somewhat hirsute, linear, angular and striate. Pappus pilose, scabrous, sim- 

 ple, unequal. Flowers wholly yellow? — Dwarf, often resinous shrubs, re- 

 sembling heaths, exceedingly branched, branches very leafy ; leaves minute 

 and subcylindric, acerose and semipervirent, crowded; flowers small, in a 

 contracted, leafy corymb, or solitary and terminal. — (So named from a re- 

 semblance to the genus Erica in the minute sempervirent leaves. ) 



Ericameria * microphylla; not viscid, leaves terete, distichally imbricated in 

 the axils; rays three or four; achenium smooth; scales of the involucrum 

 obtuse. Aplopappus ericoides, Decand., Vol. V., p. 346. 



Hab. On rocks in a mountainous situation, near St. Barbara, Upper California, Six to eight 

 inches high, much branched from the base. Leaves three to six lines long, half a line wide, nearly 

 cylindric, obtuse and rigid, at first, as well as the young branches, tomentose, at length smooth. 

 Flowers crowded into an unequal corymb, the branchlets one-flowered, full of leaves to the sum- 

 mit; scales of the involucrum in about three series, the ouler leafy and acute, the inner obtuse. 

 This cannot be, in any respect, a congener with Aplopappus ciliatus, or the genuine Chilian 

 species. 



Ericameria *nana; smooth and somewhat glutinous, densely branched; 

 leaves linear acerose, acute, channelled ; branchlets one to three-flowered ; flow- 

 ers terminal, fastigiate; scales of the involucrum similar; rays about four; 

 achenium subhirsute. 



Hab. On shelving rocks on the Blue Mountains of Oregon. A shrub scarcely a span high, ex- 

 ceedingly branched and very brittle, somewhat resinous from exudation. Leaves no thicker than 

 those of the pine, half an inch to an inch in length,^ somewhat narrower at base, sessile. Discal 

 florets about eight, not deeply toothed, and, as well as the rays, yellow. Achenium nearly the 

 length of the brow^nish pappus, linear, somewhat oblong, slightly hirsute when mature, somewhat 

 angular and compressed. 



Ericameria *resinosa; every where glutinous, smooth; branches numerous, 

 slender, corymbose; flowers pedicellate; scales of the involucrum acute, the 

 base microphyllous and squarrose; leaves subulate, acute; rays about six, often 

 bilabiate ! discal florets about twelve, all ochroleucous, five-cleft. 



