a. AND GENERA OF PLANTS. 353 
achenium subquadrangular or triangular, grooved ; pappus acute, one or two 
of the segments carried out into awns. Lspeletia amplezxicaulis; Nurr. in 
Journ. Acad. Nat. Sei. Philad., Vol. VIL, p. 38. 
_ Has. In the Rocky Mountains. Flowering in June. Since publishing an aecount of this plant 
in the seventh volume of the Journal of the Academy of Natural Sciences in Philadelphia, I have, 
myself, met with it in the Rocky Mountains, towards the sources of the Platte, from which speci- 
mens I find that, though differing some in habit, it belongs to the genus Wyethia. Stem some- 
times two or more feet high, robust, and very smooth even to the margin of the leaf; the lower, 
or radical leaves, at length coriaceous, attain a foot in length, are attenuated below, and, though 
ofien entire, are sometimes serrulate; lower stem leaves sessile, the upper semiamplexicaule; 
flowers in a sort of short, approximating raceme; sepals very broad; rays ten to fifteen; achenia 
and palea smooth. Stigmas slender, hirsute externally. 
§ I. Anargonta. Pappus without ann. 
 Wyethia Helenioides. Alarconia Helenioides, Decanys Vol. V., p. 587. Col- 
lected in Upper California, by Douglas. Nearly allied to W. Cali ifornica, but evi- 
dently a much larger plant. Ons.—The leaves of all the species are alternate. 
HELIOPSIS. (Persoon.) 
Capitulum many-flowered, heterogamous; rays ligulate, feminine, in one series; 
florets of the disk hermaphrodite, tubular, five-toothed. Stigmas slender, 
filiform, pubescent at the summit, and terminating in a smooth, acute cone. 
Involucrum somewhat biserial, shorter than the disk; sepals foliaceous at 
the summit, Saplagines; closely imbricated and coalescent below. Recep- 
nalea membranaceous, embracing, much shorter than the florets. 
Achenium quadrangular, smooth, without pappus, but with a raised border, 
and a small, epigynous disk.—Tall perennial herbs of North America, with | 
ovate, opposite, petiolate, dentate leaves. maa solitary, pedunculate 
flowers yellow, with elongated rays. 
Hehopsts scabra. . : 
Has. Arkansa; common. With the stem sometimes nearly smooth. 
Heliopsis * gracilis; smooth, leaves oblong-ovate, at either end acuminate, in- 
cisely serrate; peduncles very long and slender; involucrum subsquarrose ; 
sepals lanceolate, pubescent on the margin. 
vil.—4 0 
