JONES. — A REVISION OF THE GENUS ZEXMENIA. 157 
“Tn the Gray Herbarium there is another specimen from the same 
locality as the Pittier specimen here cited and with the same number, 
but said to have been collected by Tonduz. This was rightly referred 
by Dr. Klatt to Salmea Eupatoria, DC. (S. scandens, DC.). Notwith- 
standing a close habital similarity the plant of Pittier exhibits, by the 
presence of fertile ray-flowers with triangular achenes as well as by the 
pappus both in the ray- and disk-flowers, the technical characters of 
Zexmenia.” 
++ ++ ++ Bracts in few series, subequal. 
= Heads on short peduncles (10 to 25 mm. long) in close clusters; bracts of the 
_ involucre ovate, rather long-acuminate. 
25. Z. elegans, Sch. Bip. Leaves oblong-lanceolate to ovate, acute 
to somewhat rounded at the base, acute or acuminate at the apex, serrate, 
strigose or scabrous, beneath sparsely pubescent on the veins; petioles 
less than 1 cm. long, pilose: peduncles several in a cluster, terminating 
the branches, 10 to 25 mm. long, usually pilose; involucre subglobose or 
campanulate, 7 to 10 mm. wide, 2—3-seriate ; outer bracts ovate, caudate- 
acuminate, pubescent: ligules about 7 mm. long, somewhat exceeding 
the disk; disk-corollas slightly surpassing the involucre: achenes 4 to 
5 mm. long, those of the ray-flowers usually with 1 long awn and 2 short 
teeth, those of the disk-flowers rounded at the summit, cuneate toward 
the base, with 2 unequal awns shorter than the body. — Sch. Bip. ace. 
to Benth. & Hook. f. Gen. ii. 373 (1873), without description — 
Southern Mexico. Specimens examined, — VERA Cruz: Mirador, 
Liebmann, no. 378 (type, in herb. Gray); Sartorius (without data) ; 
Orizaba, Pringle, no. 5911, Gray, May, 1885, Thomas, Coll. of 1864, 
Botteri, no. 800 (in part). This species, although long recognized, seems 
never to have been described. 
26. Z. cosraricensis, Benth. Branching shrub or lignescent herb: 
leaves 5 to 16 em. long, 4 to 11 cm. wide, generally broadly ovate, with 
acuminate or rounded base, and very acuminate apex, subentire to 
serrate, above scabrous to densely strigose, beneath strigillose to densely 
pubescent; petioles 1 to 3 em. long, puberulent to villous: peduncles 
fasciculate in terminal or subterminal clusters, 1 to 5 em. long, puberulent 
to villous; heads 6 to 12 mm. high; involucre campanulate to subeylin- 
drical, 5 to 10mm. broad, about 2-seriate, outer bracts villous, from 
oblong to obovate or slightly panduriform, acute or occasionally rounded ; 
ligules oblong, about 1 cm. in length: disk-corollas with short tubes : 
achenes about 4 mm. long, those of the disk-flowers somewhat margined 
