334 DESCRIPTIONS OF NEW SPECIES 



corymbose, sometimes glomerate and sessile; rays about twenty-five; discal 

 florets very numerous, 



Hab. 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 oi Inula Helenium. Involucrum almost ex- 

 actly like that oi Liatris sphasroidea, foliaceous, scarcely at all squarrose, the sepals ovale, 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 like that of the genus Pteronia. 

 Achenium very long, about the length of the pappus, oblong-linear, somewhat narrowed at each 

 end, smooth, p^ile and shining, convex externally, internally somewhat angular. 



*STENOTUS. 



Capitulum heterogamous, many-flowered, hemispherical or ovate. Rays in a 

 single series, rather distant. Discal florets tubular, cyathiform, border five- 

 cleft, spreading. Branches of the stigma filiform, flat, 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, 

 unequal, scabrous. — Low alpine perennials, with almost woody roots, and 

 alternate, linear, entire, coriaceous, mostly smooth leaves; stems numerous 

 from the same caespitose caudex, dwarf and scapoid, one to three-flowered; 

 flowers often large, wholly yellow. Although, in the general character, this 

 genus approaches the preceding and Aplopappus, the habit is peculiar and 

 wholly different from either.-T-(The name from Gtevotyjs, narrowness, in allu^ 

 sion to the narrowness of the leaves, &c.) 



Stenotus ax:aulis; very dwarf and csespitose; 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; Nutt. in Journ. Acad. Nat. 

 Sci. Philad., Vol. VII., p. 33, t. iii., fig. 1. 



Hab. Near the borders of Little Godin River, in the Rocky Mountains. Flowering in June.. 



