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 
ineach. 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. 
Brickellia * oblongifolia, 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.— 
Has. Gravel bars of the Columbia and tributary streams, and along the Wah- 
lamet, common. 
Oxss.—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 liouli minute, stigma bifid. Twusszlago palmata, (Arr.)—Has. 
Maine. ~ ti. 
N. *Hookeriana, leaves cordate, not very deeply palmately lobed, the divi- 
sions angular and toothed, beneath tomentose. NV. paimata! Hooker. Bor. 
Am., Vol. L., p. 308. Wiup. Sp. Pl. 1. c., Pursn in part. Dercanp, Vol. V., 
p. 206, not of Aiton. 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 
