18 PROCEEDINGS OF THE AMERICAN ACADEMY. 
Var. latifolia, Rose. Leaves somewhat broader, oblong. — 
Contrib. U. S. Nat. Herb. i. 102. — Alamos, Palmer, no. 352. 
§ 5. Distinctly annual herb with showy flowers: disk and rays 
concolorous, yellow, red, or purple, or if discolorous the disk-flowers 
yellow or greenish and the rays red or purple: leaves ovate, lanceo- 
late, or elliptic. 
* Leaves sessile or nearly so, entire. 
+ Achenes-of the disk-flowers short and broad, obovate, 2 to 2} lines in 
length: stems hirsute with spreading hairs. 
12. Z. angustifolia, HBK. Branching, 14 to 2 feet high: 
leaves lance-linear from a sessile ovate base: disk very convex, 
orange-yellow from the abundant acute exserted chaff (orange-yellow 
minutely tipped with purple at the very summit); disk-flowers at first 
orange and becoming darker with age: rays paler yellow. — Nov. 
Gen. & Spec. iv. 251; DC. Prodr. v. 536.— Originally collected in 
the neighborhood of Guanajuato by Humboldt & Bonpland, and de- 
scribed as having leaves “scarcely 2 lines broad.” Our only authentic 
specimen of this species is one of Mendez sent by De Candolle to 
Dr. Gray and mentioned in the Prodromus as of this species. From 
other details of the description we cannot doubt that De Candolle was 
right in referring this plant to Kunth’s species, although in it and in 
all the following specimens attributed to this species the leaves are com 
siderably brofder than originally described, varying from 3 to 8 lines 
in breadth. " Evidently identical with Mendez’ plant are specimens 
collected at Morelia, Ghiesbreght ; no. 369 (?Z. Ghiesbreghtii, Verlot, 
Rev. Hort. 1862, 368; Vilmorin, Fl. Pl. Terre, 971, = Z Mexicana, 
Hort. jide Vilmorin, 1. c.), and near La Barca, Jalisco, Pringle, 20- 
3866; also cultivated plants from the Harvard Botanic Garden, dated 
1861 and 1865. From this species, notwithstanding its still broader 
leaves, we cannot confidently separate the horticultural Z. Haagean, 
13. Z. elegans, Jacq. Erect: stems less branched: leaves 
broader, ovate or elliptic, closely sessile and clasping, inch or 80 m 
breadth: disk-flowers yellow or orange, scarcely or not at all exceeded 
by the purplish tipped chaff; rays numerous, purple or lilac. — Coll. & 
Icon. Pl. Rar. iii. t. 589; Sims, Bot. Mag. t. 527. — South Mexico, 
Ziticuaro, Hartweg ; mountains of Tixtla near Cuernavaca, Berlandier, 
no. 975; also without locality, Ghiesbreght, no. 306. Extensively culti- 
vated in various countries. 
