156 PROCEEDINGS OF THE AMERICAN ACADEMY. 



spherical, turbinate, 5-seriate ; bracts narrowly ovate, obtuse, scabrous : 

 acheues 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. FASCICULATA, Sch. Bip. A tall much branched shrub; 

 branches roughened by Ienticels : 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 cm. long in terminal and subterminal fascicles ; heads 



5 to 8 mm. high ; involucre narrowly campanulate to cylindrical, 3 to 

 G 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. Lipocliaeta 

 fasciculata, DC. Prodr. v. 610 (1836). — Mexico. Specimens examined, 

 — Chihuahua: southwestern part, Palmer, no. 155. Tamaulipas : 

 Tula, Berlandier, nos. 2134, 717 (co-type, in herb. Gray). San Luis 

 Potosi : Canoas, PringU, no. 3753 : 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 cm. long, 6 to 8 cm. 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: ray- 

 flowers 6 to 9 ; ligules small and inconspicuous ; disk-flowers about 35, 

 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 ex- 

 it mi tied, — Costa Rica: in woods, Tsaki, Talamanca, altitude 200m., 

 Pitlicr, no. 9565 (type, in herb. Gray)." 



