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 em. high, and 0.5 em. thick, about 20-flowered: involucre 
4—5-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, Z. 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 em. 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 portion 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. Pittier, 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. Ri.). 
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. pulchellus, DC., and S. abietinus, 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 calyculate 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, 
-C. G. Pringle, no. 8704 (hb. Gr.) 
Lycoseris macrocephala. 
angulate, striate, at first arach 
alternate, short-petiolate, elliptic 
Stem leafy to the inflorescence, sub- 
noid-tomentulose, later glabrate: leaves 
-lanceolate or somewhat ovate-oblong, 
