GREENMAN. — NEW ANGIOSPERMS FROM MEXICO. 119 



on the upper surface, paler and essentially glabrous beneath : inflor- 

 escence a terminal compound many-headed corymb : heads discoid, 

 about 1 cm. high, and 0.5 cm. thick, about 20-flo\vered : involucre 

 4-o-seriate ; bracts of the involucre ovate to ovate-oblong, obtuse, im- 

 bricated, the outer bracts shorter than the inner: achenes 2.5 mm. long, 

 somewhat pubescent above. — Mexico. State of Chiapas : Chicarras, 

 altitude 1000 to 2000 m., 6 February, 1896, E. W. Nelson, no. 3766 

 (hb. Gr., and hb. U. S. Nat. Mus.). 



Senecio firmipes. Fruticose : stem leafy, glabrous : leaves scat- 

 tered, crowded, lanceolate, 2 to 3 cm. long, 4 to 6 mm. wide, acuminate, 

 acute, somewhat pungent- tipped, entire, slightly hirtellous on the margins, 

 narrowed below into an articulate base, glabrous on both surfaces, and 

 somewhat glaucous beneath ; the persistent petiole-like 23ortion of the 

 base of the leaves later more or less covering the stem : inflorescence a 

 terminal compound corymbose cyme : heads discoid, 5 to 6 mm. high, 

 15-20-flowered ; involucre of 8 oblong-ovate glabrous thickish obtuse 

 bracts, shorter than the flowers ; bracteoles few and appressed to in- 

 volucre : achenes glabrous. — Costa Rica. Cerro de la Muerte, alti- 

 tude 3100 m., January, 1897, H. Plttier, no. 10,472 (hb. Gr., and hb. 

 Inst. Phys.-Geog. Cost. Ri.) ; Vueltas, H. Pittier, no. 10,505 (hb. Gr., 

 and hb. Inst. Phys.-Geog. Cost. Hi.). 



This species belongs to the § Fruticosi, and of the North American 

 species it is nearest related to S. vernicosus, var. major, Wedd. In 

 South America, however, it has several congeners, namely, >S. glacialis, 

 Wedd., *S'. pulcheUus, DC, and *S'. abietimts, Willd. 



Senecio (§ Mulgedifolii) pterocaulis. Stem erect, striate, arach- 

 noid-tomentose : leaves alternate, lanceolate or lance-attenuate, 0.5 to 

 1.5 dm. long, 3 to 13 mm. broad, acute, cartilaginous-denticulate, con- 

 spicuously decurrent on the stem, arachnoid-tomentose on both surfaces 

 more densely so beneath ; inflorescence terminating the stem and 

 branches in a paniculate many-headed cyme ; bracts of the inflorescence 

 linear-attenuate to setaceous: heads 10 to 12 mm. high, discoid, 40-50- 

 flowered : involucre calyculafe with minute setaceous bracteoles ; bracts 

 of the involucre usually 21, linear, acute, glabrous and stramineous : 

 achenes appressed-sericeous-pubescent. — Mexico. State of Morelos : 

 in lava fields above Cuernavaca, altitude 2155 m., 24 November, 1902, 

 a G. PrUgle, no. 8704 (hb. Gr.). 



Lycoseris macrocephala. Stem leafy to the inflorescence, sub- 

 angulate, striate, at first arachnoid-tomentulose, later glabrate : leaves 

 alternate, short-petiolate, elliptic-lanceolate or somewhat ovate-oblong, 



