334 DESCRIPTIONS OF NEW SPECIES 
corymbose, sometimes glomerate and sessile; rays about twenty-five; discal 
florets very numerous. 
Has. Plains of Oregon, near Walla-Walla. A low, robust plant, about twelve to eighteen 
inches high. Leaves rigid and coriaceous, four or five inches long, the lower one and a half to 
two inches broad. Capituli nearly as large as those of Jnula Helenium. Involucrum almost ex- - 
actly like that of Liatris sphxroidea, foliaceous, searcely at all squarrose, the sepals ovate, acute, 
the lower bracteoles serrate; rays narrow; discal florets narrow tubular, not expanding nor ex- 
serted beyond the pappus. Stigma obtuse, flat, pubescent. Rays. very narrow, shorter than the 
disk. Pappus rufous, shining, stiff and bristly, distinctly barbellate and thickened at the extremi- 
ties, in two or more series, somewhat unequal, persistent, very li like that of the genus Pteronia. 
_Achenium very long, about the length of the pappus, oblong-linear, somewhat narrowed at each 
“end, smooth, pale and shining, convex externally, internally somewhat angular. 
+ 
— *STENOTUS. 
Capitulum ieeiogamous, many-flowered, hemispherical or ovate. Rays i ina 
single serie | rather distant. Discal florets tubular, cyathiform, border five- 
cleft, spreading. Branches of the stigma Sliform, fiat, puberulous, exserted. 
Receptacle alveolate, dentate. Involucrum imbricate, scales ovate, erect, 
rigid, with broad membranaceous margins, (rarely bracteolate.) Achenium 
oblong, compressed, sericeous. Pappus setaceous, shorter than the florets, 
equal, scabrous.—Low alpine perennials, with almost woody roots, and 
alternate, linear, entire, coriaceous, mostly smooth leaves; stems numerous 
from the same cwespitose caudex, dwarf and scapoid, one to three-flowered; 
_.. wowers often large, wholly yellow. Although, in the general character, this 
genus approache s the preceding and Aplopappus, the habit is peculiar and 
r whasll differain rom either. —(The name from _— narrowness, in allu- 
sion to the narrowness of the leaves, &c.) 
_ Stenotus acaults; very Swat and cairo: leaves lanceolate-linear, pun- 
gently acute, scabrous and almost cinereous, three-nerved; scapoid stem one- 
flowered ; Involucrum hemispherical, scales membranaceous, acute; rays about 
twelve; achenium sericeous. ‘ Chrysopsis acaule; Nurr. in Journ. Acad, Nat. 
Sci. Philad., Vol. VIL., p. 33, t. iii., fig. 1. 
Has. Near the borders of Little Godin River, in the Rocky Mountains. Flowering in June. 
* 
