150 PROCEEDINGS OP 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). 



b. Pappus of the disk-achenes consisting of 2 to 3 awns nearly as long as the 

 body 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 cm. high ; involucre 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. v. 613 (1836). V. tuberosa, Ivlatt, Ann. Naturh. 

 Hofmus. Wien, ix. 361 (1894). Wedeliaf aurea, D. Don, Bot. Mag. t, 

 3384 (1835). — Prairies in Central Mexico. Specimens examined, — ■ 

 State of Mexico : Pringle, no. 3239. Jalisco : Henjuquilla, Rose, 

 no. 2549. Mexico without precise locality, Schmitz, no. 248, and 

 Schaffner, 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) cm. long, terminal and solitary or in cymes of 3, 

 strictly glabrous; heads 10 to 15 ram. high; involucre 5 to 10 mm. 

 broad, 3-seriate ; outer bracts ovate, attenuate, ciliate : ligules bright 

 yellow, 1 to 1.5 cm. 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. 



