AND GENERA OF PLANTS. 379 



Actinella scaposa. ^. * linearis; slenderly villous; leaves narrow-linear, sub- 

 lanceolate, much attenuated below, all entire, with dark punctures; scape very 

 long and slender, with one capitulum ; sepals linear-oblong, obtuse, twenty or 

 more in two series. 



Hab. Texas. (Professor Riddell.) Rays about twelve, twice as long as the disk; pappus five- 

 leaved, white and thinly membranaceous, nerveless, oblong, abruptly apiculate ; achenium slenderly 

 villous. Receptacle convex. Probably a distinct species, as the leaves are never apparently pin- 

 natifid, as in the true A. scaposa. 



Actinella * glabra; leaves narrow-linear, sublanceolate, attenuated below, 

 broadly sheathing and ciliate at base, covered with dark, impressed punctures; 

 scape one-leaved, one-flowered; involucrum campanulate, biserial, lanuginous, 

 sepals about twelve, ovate, obtuse; receptacle conic. 



Hab. Missouri, (near the Shawnee villages.) I have only seen a single specimen, after flowering. 

 It appears to be much allied to the preceding species, but with a different involucrum and recep- 

 tacle. Root perennial, with persistent vestiges of leaves, growing probably in tufts. Scape with a 

 slender linear leaf about half way up to the flower. 



Actinella *Torreyana; densely csespitose; leaves linear, punctate, sparsely 

 pilose, but green, and darkly punctate, with a callous, rather obtuse point; 

 axills, scape and involucrum very loosely lanuginous; sepals oblong-ovate, ob- 

 tuse, with membranaceous margins; pappus five-leaved, hyaline, and slenderly 

 apiculate; receptacle conic. Actineaintegrifolia; Torrey, in Annals Lyceum 

 Hist. Nat. N. York., Vol. II., p. 213, non Kunth. 



Hab. On the lofty hills or mountains, called the " Three Butes " of the upper Platte, on shelving 

 rocks. Flowering in June. An alpine species of very dwarf stature, two to three inches high. 

 Rays ten or twelve deeply three-toothed, strongly veined, rather wide and large. 



Actinella *lanata; densely csespitose; leaves linear, subacute, softly and co- 

 piously pilose, as well as the axills; scape and involucrum nearly impunctate; 

 the primary leaves oblong-spathulate, coriaceous; outer sepals lanceolate, or 

 lanceolate-ovate, without membranaceous margins; pappus five-leaved, scales 

 lanceolate, with long and distinct awns; receptacle conic. 



Hab. With the above, which it very closely resembles, but is much more pubescent, with longer 

 awns to the pappus and a different involucrum. 



1 1 Caulescent; leaves pinnatifid, filiform. 



Actinella RicTiardsoni; caulescent, nearly smooth; leaves alternate, petiolate, 

 pinnatifid; segments few, filiform-linear, rigid, punctate; branches mostly one- 



