842 PATAGONIAN EXPEDITIONS I BOTANY. 



17. SENECIO CHRYSOCOMOIDES Hook. & Arn. 



Corymb of 2-5 heads. Glabrous shrubs, 20 cm. high, with fascicled 

 branches. Leaves linear, straight, deeply pinnatifid, their segments few 

 (2-4), narrow-linear, short, straight. Heads 6 mm. in diameter. Invo- 

 lucre ovate, basiacute, long-calyculate, its scales about 10, lax, subulate, 

 shorter than the corollas. 



Patagon., on east coast. 



1 8. S. CTENOPHYLLUS Phil. 



Corymb lax. Glaucous-glabrous shrubs, with pectinate leaves, the lobes 

 of the lower leaves toothed. Peduncles capillary, as long as the bracteo- 

 late, tomentose heads. Invohicral scales 1012, apically sphacelate. 

 Ligules about 6. Achenes silvery puberulous. 



Remarkable for the pectinate form of its leaves and for its tomentose 

 heads. 



(Chili, Desert of Atacama); Patagon. 



19. S. CUNEATUS Hook. f. 



Corymb 3-headed, with few leaves. Glabrous herb, with ascending, 

 sulcate stem, leafy below. Most of the leaves on short branches, obovate- 

 spatulate, basicuneate, attenuate-petiolate, coarsely and irregularly toothed, 

 subcoriaceous. Heads radiate, their pedicels i -leaved at base. Involucre 

 broad, its scales i -seriate, linear. 



Magellan. 



20. S. DANYAUSII Homb. & Jacq. 



Corymbed. Slender undershrub, branching at the base, laxly woolly. 

 Leaves fascicled, linear or linear-oblong, subacute, entire or coarsely 

 toothed, margins revolute, woolly especially underneath. Heads small, 

 campanulate, constricted in the middle. Invohicral scales linear-sub- 

 acute, webby, shorter than the disk. 



"Distinguished from S. micropifolius DC. by its leaves being often 

 linear-cuneiform, trilobed at apex." (Franchet.) 



Magellan; by Hatcher in S. Patagon.; W. Patagon., near Rio Aysen 

 (Dusen) ; in valley of Rio Gallegos ; in Fuegia, at Ushuaia, and passim, 

 as a steppe plant, and the commonest species of this genus. 



Var. (i) with leaves entire and larger heads; (2) with leaves toothed 

 and smaller heads. 



