156 PROCEEDINGS OF THE AMERICAN ACADEMY. 
spherical, turbinate, 5-seriate ; bracts narrowly ovate, obtuse, scabrous: 
achenes ovoid, margined on the angles; squamellae minute. — Sch. Bip. 
in Seemann, Bot. Voy. Herald, 306 (1852-57).— Mexico. No speci- 
men of this species has been seen by the writer and its place here in the 
genus is somewhat inferential. 
23. Z. rascioutata, Sch. Bip. A tall much branched shrub; 
f branches roughened by lenticels: leaves oblong-lanceolate to broadly 
ovate, acute or acuminate at the apex, acute to rounded at the base, ser- 
rate or subentire, appressed-strigose above (the hairs frequently with 
swollen bases), sparsely pubescent on the veins to densely pilose beneath: | 
peduncles 1 to 5 em. long in terminal and subterminal fascicles ; heads 
5 to 8 mm. high; involucre narrowly campanulate to cylindrical, 3 to 
6 mm. broad; bracts about 3-seriate, ovate, obtuse to abruptly acuminate, 
the outer the shortest: rays conspicuous; disk-corollas elongated and 
rather narrowly tubular. —Sch. Bip. in Seemann, Bot. Voy. Herald, 
306 (1852-57); Hemsl. Biol. Cent.-Am. Bot. ii. 173. Lipochaeta 
fasciculata, DC. Prodr. v. 610 (1836). — Mexico. Specimens examined, 
— CuHInvAHUA: southwestern part, Palmer, no. 155. TAMAULIPAS? 
Tula, Berlandier, nos. 2134, 717 (co-type, in herb. Gray). .SaN Luis 
Potosi: Canoas, Pringle, no. 8753; between San Luis Potosi and 
Tampico, Palmer, no. 1578. A variable species, which with further 
knowledge may prove divisible. Palmer’s no. 1578 and Townsend & 
Barbour’s no. 384 are doubtfully placed here. 
++ + Bracts about 1 mm. broad, in 3 series, lanceolate. 
24. Z. Pittieri, Greenman, n. sp. “ Stems striate, finely strigillose : 
leaves remote, elliptic-oblong, 10 to 15 em. long, 6 to 8 em. wide, short- 
acuminate, rounded or obtuse at the base, remotely denticulate, strongly 
3-nerved from near the base to the apex, usually with 2 pairs of less 
conspicuous marginal veins, prominently reticulate-veiny beneath, hirtel- 
lous-pubescent on both surfaces; petioles 10 to 15 mm. long: heads 
6 to 8 mm. high, borne in a terminal corymbose panicle; involucre 
3-seriate, about 5 mm. broad; bracts ovate-lanceolate, 3 to 4 mm. long 
appressed-hirtellous-pubescent, the outer somewhat the smallest: Tay- 
flowers 6 to 9; ligules small and inconspicuous ; disk-flowers about 39, 
exceeding the involucre: achenes narrowed below, glabrous, inconspicu- 
ously ciliate, those of the ray-flowers with 3 paleaceous awns longer 
than the body, those of the disk-flowers with 2 awns and several minute 
squamellae more or less united. — Central America. Specimens 
amined, — Costa Rica: in woods, T'siki, Talamanca, altitude 200m. 
Pittier, no. 9565 (type, in herb. Gray).” 
