538 PROCEEDINGS OF THE AMERICAN ACADEMY, 



Sims, Bot. Mag. t. 1627. Platypteris crocata, HBK. 1. c. 201. — Tepic, 

 Santiago, Lavih, no. 548-; Jalisco, in ravines near Guadalajara, Palmer, 

 no. 700, Priyigle, nos. 1796, 1807; Morelos, Cueruavaca, Bourgeau, 

 no. 1770; between Huajuapam, Oaxaca, and Retlatzingo, Puebla, alti- 

 tude 1,400 to 2,000 m., E. W. Nelson, no. 1991 ; Costa Rica, Pittier, 

 nos. 4136, 4905. 



§ 3. Stenocarpha. Heads of medium size, globose : rays present, 

 inconspicuous. Pales narrowly linear. Achenes papillose. Leaves op- 

 posite, sinuate-pinnatifid. 



6. V. plattptera, Sch. Bip. in Klatt. Leopoldina, xxiii. 144 (1887), 

 not Benth. & Hook. f. Gen. ii. 350 (in note), which, although earlier 

 (1873), is a uomen nudum. — Mexico, Puerto de Sta. Cruz, Liehmann, 

 no. 454. 



§ 4. Alatipes. Heads large, subglobose : rays present, pale yellow. 

 Peduncles (except sometimes in V. splicerocephal(C) winged. Scales of 

 the involucre ovate or broadly oblong, some or all rounded at the apex 

 (occasionally involute and not showing at once their full breadth). 



* Heads numerous, short-peduncled : leaves ovate, serrate, not lobed : wings of 



the stem narrow or obsolete. 



7. V. SPH^ROCEPHALA, Gray. Woody at the base, 1 to 2 m. high. 

 — Gray in Wats. Proc. Am. Acad. xxii. 428 (1887). — Mountains near 

 Guanajuato, Dugcs, no. 472_: Jalisco, on hills near Guadalajara, Palmer, 

 no. 448, Pfingle, no. 1779; Colima at Manzanillo, Palmer, no. 1404. 



* * Heads few : leaves dentate or lobed : stems and peduncles broadly winged. 



1- Leaves rhombic-ovate to oblong, dentate but not lobed. 



8. V. SCABRA, Benth. PI. Hartw. 41. This species is reduced by 

 Mr. Hemsley and by Dr. Gray to V. teti'aptera, but from a drawing 

 by Klatt and Bentham's brief characterization of the involucre we iden- 

 tify with the species Palmer's no. 377, from Tequila, Jalisco, which with 

 its few broad herbaceous involucral scales is surely distinct from V. te- 

 traptera. The type of V. scabra was collected by Hartweg at Zita- 

 quaro in Eastern Michoacan. 



•^ •«- Leaves, at least the lower ones, sinuate-lobed and borne on a distinct though 

 broadly winged petiole. 



9. V. Klattii. V. heterophylla, Klatt, Arbeit. Bot. Mus. Hamb. 

 1892-93, p. 3 of reprint, not Gray. — Mountains near Patzcuaro, Mi- 

 choacan, Pri?2^^e,. no. 3983 (distrib. as V. lilatyptera'i'). 



