332 DESCRIPTIONS OT* NEW SPECIES 



Hab. Witli the above, and on the plains of the Oregon. About a foot high, very similar to' the" 

 preceding, but with the leaves strongly serrated. Pappus rufous, very rigid; involucrum obconic. 

 These three species have a strong resemblance to Grindelia, are all more or less glutinous and 

 resinous, so as to have a bitterish taste; the leaves in the present species are often sprinkled with 

 resinous atoms. 



Homopappus? spathulatus. Solidago spathulata, Decand., Vol. V., p. 339. 

 I have not seen this plant, but from the character given, and the large number 

 of florets, it appears to belong to this genus. Is the pappus setose? 



Homopappus? squarrosus. Aplopappus squarrosus, Hook, and Arnot. Bot. 

 Beech., p. 146. 



§ I. *Myrianthus. — Capitulum nearly spherical, with many narrorv rays; dis- 

 cal florets all fertile; pappus barbellate torvards the apex, persistent; achenium 

 compressed, angular; involucrum foliaceous. — With the habit of the preceding. 



Homopappus *racemosus; smooth, summit of the simple stem and involu- 

 crum pubescent; leaves lanceolate, serrate, acute; above oblong-lanceolate, am- 

 plexicaule, often nearly entire; capituli few, racemose, (three to seven); scales 

 of the involucrum oblong, leafy, rather obtuse, sometimes lanceolate; rays fif- 

 teen to twenty; achenium subsericeous. 



Hab. Plains of the Wahlamet. About twelve to eighteen inches high. Leaves coriaceous, 

 smooth, except the uppermost, narrow lanceolate, or oblong-lanceolate, acute, attenuated below in 

 the radical ones. Serratures pungently acute. Flowers pedicellate. Involucrum hemispherical, 

 scales imbricated in about three series. Pappus rigid, scabrous, fulvous, somewhat barbellated to- 

 wards the extremities. Achenium as in the preceding, but smaller, (as well as the plant,) shining, 

 pale testaceous, covered with sparse hairs, which do not conceal the striatures. 



Homopappus unijlorus. Donia uniflora. Hooker, Vol. II., p. 25, t. 124. 

 Rays apparently about twenty-five. 



Subgenus. *AcTINAPHORTA.t 



Rays numerous, fertile or infertile. Stigma filiform, acuminate, pubescent, 

 Achenium linear-oblong, subsericeous; pappus of one or two series of sca- 

 brous hairs, often barbellate towards the tips, some of them thinner and 



t From axfw, a ray, and at«pta, sterile, in allusion to the infertile rays. 



