288 DESCRIPTIONS OF NEW SPECIES 



wards the base, smooth and green, but shining, with a coating of yellow resi- 

 nous atoms having a heavy aromatic scent; stem branching above; branches 

 terminating in corymbulose clusters of subsessile flowers, about five capituli 

 in each. Florets straw-yellow, inclining to white, cylindric and smooth, the 

 border connivent. Stigmas exserted, smooth, thicker toward the extremity. 

 Achenium cylindric, ten-striate. Pappus of a single series of twenty to twenty- 

 four scabrous hairs. Receptacle naked, flat. 



BricTiellia * ohlongifolia, leaves alternate, oblong-lanceolate, acute, nearly all 

 entire, scabrous, viscid, and shortly pubescent; stems subdecumbent, branched 

 above; flowers corymbose, subsessile; inner scales of the involucrum long, 

 linear, and acute; pappus barbellate, white, twenty to twenty-four rayed. — 

 Hab. Gravel bars of the Columbia and tributary streams, and along the Wah- 

 lamet, common. 



Obs. — Perennial, viscid, aromatic and heavy-scented; many stems from the 

 same perennial root, scarcely a foot high. Involucrum at length spreading out 

 flat, the inner sepals longer than the long, almost plumose, pappus. Lower 

 sepals lanceolate, a little spreading. Receptacle naked. Achenium cylindric, 

 ten-striate, somewhat pubescent. Florets thirty to forty, yellowish, narrow and 

 inconspicuous; stigmas but little exserted, thickened at the extremity, and 

 smooth. — Flowery in August and September. Apparently a species of Clavi- 

 gera, but the achenium is pubescent, and deeply ten-striate. 



NARDOSMIA. (Cassini.) 



Nardosmia palmata, leaves reniform-cordate, unequally seven-lobed, incisely 

 toothed; female liguli minute, stigma bifid. Tussilago palmata, (Ait.) — Hab. 

 Maine. 



N. * Hooke?-iana, leaves cordate, not very deeply palmately lobed, the divi- 

 sions angular and toothed, beneath tomentose. N. palmata! Hooker. Bor. 

 Am., Vol. I., p. 308. Willd. Sp. PI. 1. c, Pursh in part. Decand, Vol. V., 

 p. 206, not of Alton. Closely allied, if, indeed, sufficiently distinct from N. 

 corymbosa. 



Nardosmia *speciosa, dioecious, flowers and leaves coeval; leaves cordate-reni- 

 form, circular, about nine-lobed, not deeply cleft, divisions angularly toothed 



