MACLOSKIE I COMPOSITE. 857 



Involucre broad, shorter than the disk, with 10-12 scales; the outer scales 

 appressed, all sphacelate-obtuse at the apex. Achenes puberulous. 



(Catamarca.) 



SENECIO PSAMMOPHILUS DUSENII. 



Branches more elongate than the type, virgate, flexuose. Leaves most 

 entire, some pinnately 3-(or more) partite. 

 Patagon., at Puerto Madryn, by Dusen. 



75. S. PULCHER Hook. & Arn. 



Corymb of large heads, each 5 cm. broad. Handsome, simple or 

 branching plant, sometimes a meter high, webby-tomentose, with decidu- 

 ous wool. Leaves oblong-lanceolate, crenate-dentate, the radical as long 

 as the petioles ; cauline leaves remote, sessile, upwards semi-amplexicaul 

 and subdecurrent. Involucre campanulate-hemispherical, calyculate, its 

 scales not sphacelate, woolly, obtuse. Ligules 20, purple. 



(S. Brazil); N. Patagon., by Rio Negro. 



76. S. SERICEO-NITENS (Phil.) Speg. (S. patagonicus Phil, non H. & A.) 

 Radiate heads solitary, ending the branches. Silky-tomentose under- 

 shrubs, with long branches, naked upwards. Leaves narrow-linear, 

 crowded, acute. Involucre without calyculus, its scales about 15, acute, 

 tomentose, not sphacelate, scarcely shorter than the disk. Ligules to 12. 

 Achenes glabrous. 



Patagon.; by O. Nordenskjold, in valley of Rio Gallegos. 



77. S. SERICEUS (G. Ktze., 1831, sub Cacalid] O. Ktze. 



This is made by O. Kuntze to include several species which have been 

 separated chiefly by geographical marks ; low, shrubby, with at least in 

 youth a silky-tomentose indumentum ; also as identical with S. albicaulis, 

 candolleanus, gilliesii and incisus, H. & A. (1841) ; and neai (with leaves 

 entire, subglabrescent). 



"Among these the size of the heads, the number of flowers in each, and 

 the size of the leaves vary, the leaves being smaller in dry places. Entire 

 and pinnatifid leaves may occur on the same shrub." (O. Ktze.) 



78. S. SMITHII DC. 



Terminal corymb of 6 or more broad, radiate heads. Erect, tall shrub, 

 with hollow, simple stem, and leaves underneath or on both surfaces, lax- 



