FLORA OF SOUTH AMIiKICA AND THE PACIFIC. 323 



plant, and the Hymenopappns anthemoides of Juss., altliouffh 

 the remarkable tendency of the involucre to become conni- 

 vent by age, has not been observed by any of these botanists. 

 If it be really a distinct species, it may be named H. conni- 

 vefis. The branches and peduncles are deeply striated as in 

 H. Hcenkemm, from which it is distinguished by its more 

 compound leaves. 



1175. (2.) H. Tweedei, (H. et A.) ; herbacea glabra sub 

 elongata decumbens, foliis anguste linearibus obtusis vel ad 

 medium 2 — 3-fidis, capitulis radiatis, involucro campanulato 

 squamisoblongo-ovalibus obtusis serie interiore subsequilongo, 

 pappi paleis 5 — 6 oblongis sensim acuminatis. — Rio Grande, 

 and dry pastures, road sides of Los Loamos, N. Patagonia; 

 Tweedie^ (n. 859.) — In this and the last species the inner 

 leaflets of the involucre are coriaceous and flat, the outer 

 ones slightly carinate at the base. 



1176. (1.) Cephalophora glmica, Cav — DC. Prodr. v. p. 

 662. — Valparaiso and Conception; Cuming, {n. 126, and 

 553.) Bridges, [n. 220.) Valdivia ; Bridges, («. 651.)— Casa 

 Blanca, Chili; Dr Gillies. 



117*7. (2.) C. aromatica, DC. Prodr. v. p. 662. — Graemia 

 aromatica, Hook. — Valparaiso; Bridges, (n. 219.) Buenos 

 Ayres (cultivated;) Ticeedie. — Although in deference to De 

 Candolle, we retain these two species as distinct, we believe 

 they are mere varieties, and that his C. plantaginea is another 

 form. The difference pointed out in the shape of the leaves 

 is certainly not permanent, and the only one we know lies in 

 the annual or biennial duration of the root, and the size of 

 the capitula ; but this last is likewise variable. Both vary 

 from glabrous to canescent ; the lower leaves are toothed, the 

 upper entire; those at the base of the ramifications, particu- 

 larly in our specimens from Tweedie, are slightly decurrent. 



1178. (3.) C. heterophylla, {Less DC. Prodr. v. p. 662) ; 



suffruticosa ramosa canescens, foliis linearibus vel dentato- 

 pinnatifidis, involucri squamis adpressis, coroUis radii 3-loba- 

 tis pallidis, disco purpurascente, pappi paleis circiter 10 

 elongatis, achenio argenteo-sericeo. — Buenos Ayres; Tvieedie, 



