304 DESCRIPTIONS OF NEW SPECIES 



which the achenium differs; also to Calotheca, but wholly different in the 

 involucrum and pappus. Of the true Galatella we have no species. In our 

 section the flowers are larger, fewer, and scarcely corymbose. 



Galatella nemoralis, Nees. Ast. 173. Decand. Prod., Vol. V., p. 257. /?. 

 rubella, smoother, with narrower leaves, a pink red flower, and a white pappus. 



Hab. In sphagnose swamps, from New England to Canada. /3. Quaker Bridge, New Jersey. 

 Flowering in September. 



Galatella graminifolia. Hook. Flor. Bor. Am., Vol. II., p. 15. Aster gra- 

 minifolius, Pursh, Flor. Bor. Am., Vol. II., p. 545. I have not had an op- 

 portunity of examining this plant, but, from its near affinity to the preceding, 

 believe it to belong to the present section. 



DIPLOPAPPUS. 



Diplopappus alpinus; cgespitose and low; stems simple, one-flowered, villous, 

 many from the same root; leaves sessile, erect, crowded, entire, oblong, apicu- 

 late, scabrous, with a cartilaginous margin; upper part of the stem terminating 

 in a naked peduncle ; involucrum villous ; scales very acute ; rays numerous, 

 longer than the disk. Chrysopsis alpina, Nutt. in Journ. Acad. Nat. Sci. 

 Philad., Vol. VII., p. 34. 



Hab. In dry prairies along the borders of Flat-Head River, in the Rocky Mountains. Flower- 

 ing in June. A very elegant and distinct alpine species, still proximately allied to D. linarixfo- 

 lius, of which it has the purple flower. Stems three to four inches high. Flowers large. Leaves 

 oblong and linear-oblong, smooth, but very scabrous, rigid. Involucrum rather short and loose, of 

 about three series of linear-lanceolate, appressed scales, membranaceous on the margin. Pappus 

 scabrous, copious, the external crown white. Achenia silky villous. 



TOWNSENDIA. (Hooker.) 



Townsendia sericea; csespitose; leaves narrow linear, acute, scarcely half a 

 line wide, canescently sericeous; capituli sessile on the caudex; scales of the 

 involucrum numerous, very narrow and acuminate. — Achenium as in the rest 

 of the genus, obovate, margined, and flatly compressed, sericeous, with a nu- 

 merous connate series of white, silky pappus, almost plumosely barbellate, and 

 remarkably attenuated above. 



