150 PROCEEDINGS OF THE AMERICAN ACADEMY. 
ligules dark purple, 12 to 15 mm. long, a third as broad: achenes nar- 
rowly wing-margined ; pappus reduced to short teeth more or less united 
into a shallow cup. — Proc. Am. Acad. xl. 42 (1904). — Western Mex- 
ico. Tepic: in the foot-hills of the Sierra Madre between Pedro Paulo 
and San Blacisto, Rose, no. 1987 (type, in herb. U. S. Nat. Mus. ; frag- 
ments and tracing in herb. Gray). 
6. Pappus of the disk-achenes consisting of 2 to 3 awns nearly as long as the 
ody of the achene: ligules yellow. 
10. Z. Aurea, Benth. & Hook. f. Stem 1.5 to 3 dm. high, strict and 
simple or sparingly branched from the base, bearing 3 to 5 pairs of 
leaves, hirsute-pubescent, generally terminated by a 3-headed cyme: 
leaves ovate-oblong to elliptical or rhomboid-oval, dentate-serrate, rather 
densely pilose or hirsute along the veins beneath, densely strigose above: 
heads about 1 em. high ; invyolucre campanulate, commonly 1 cm. broad; 
outer bracts 5, ovate-oblong, densely hirsute: ray-flowers about 10; lig- 
ules bright yellow, considerably exceeding the disk; disk-flowers numer- 
ous, their corollas tubular-funnel-shaped, the teeth papillose on the inner 
surface: disk-achenes 3 mm. long, somewhat 3-angled but strongly com- 
pressed, usually bearing 3 rigid awns no longer than the body of the 
achene ; awns of the ray-achenes none or reduced to 3 short teeth. — 
Gen. ii. 371 (1873) ; Hemsl. Biol. Cent.-Am. Bot. ii. 172. Verbesina 
aurea, DC. Prodr. vy. 613 (1836). V. tuberosa, Klatt, Ann. Naturh. 
Hofmus. Wien, ix. 361 (1894). Wedelia? aurea, D. Don, Bot. Mag. & 
3384 (1835). — Prairies in Central Mexico. Specimens examined, — 
State or Mexico: Pringle, no. 3239. Jatisco: Henjuquilla, Rose, 
no. 2549. Mexico without precise locality, Schmitz, no. 248, and 
Sehaffner, no. 56. 
11. Z. xylopoda, n. sp. Herb, with a small cluster of rather slender 
stems 3 to 6 dm. high, from a lignescent base: leaves 1 to 7 cm. long, 7 
to 25 mm. wide, ovate or spatulate to elliptic-linear, short-petioled or 
sessile, from cuneate to rounded at the base, generally acute at the apex, 
dentate-serrate to subentire, ciliate, sparingly pubescent or glabrous be- 
low, strigose above with bases of the hairs enlarged : peduncles from 1 
to 9 (generally about 5) em. long, terminal and solitary or in cymes of 3, 
strictly glabrous; heads 10 to 15 mm. high; involucre 5 to 10 mm. 
broad, 3-seriate ; outer bracts ovate, attenuate, ciliate: ligules bright 
yellow, 1 to 1.5 em. long, 5 mm. wide; disk-corollas scarcely exceeding 
the involucre, with short proper tube, long funnel-shaped throat, and 
short somewhat fimbriate limb: disk-achenes 2 mm. broad, 5 mm. long; 
