ROBINSON AND GREENMAN. — GENUS VERBESINA. 543 
* * * Body of the achenes 3 to 5 mm. long, upwardly pubescent; wings narrower. 
+ Bracts of the involucre not very unequal, 2-3-seriate, grayish green: Mexican. 
26. V. CHIHUAHUENSIS, Gray, 1. c.— Limestone ledges, Jimulco, 
Durango, and Carneros Pass, Coahuila, Pringle, nos. 121, 2782, and Sta. 
Eulalia Mts., Chihuahua, Pringle, no. 657; Durango, Palmer, no. 322 
(coll. of 1896), a form with broader deltoid leaves. 
+ + Bracts of the involucre strongly unequal, 4—5-seriate, at length nigrescent : 
Lower Californian. 
29. V. venosa, Greene, Bull. Torr. Club, ix. 110 (1882). V. has- 
tata, Kellogg, ace. to Mrs. Curran, Bull. Calif. Acad. Sci. i. 140 (1885). 
Encelia cedrosensis, Rose, Contrib. U. S. Nat. Herb. i. 17 (achenes too 
young to show wings). — Cedros Island, off the coast of Lower California. 
Palmer, no. 741, Anthony, nos. 63, 296. : 
§ 7. Ximenesia, Gray. Heads large; involucral bracts narrow, 
herbaceous, 2-8-seriate, subequal or the outer often more elongated and 
foliaceous: rays showy, yellow or orange, broad, deeply 3-toothed or 
‘lobed at the apex: mostly annuals, always more or less canescent at least 
on the under surface of the coarsely toothed petiolate leaves. — Syn. Fl. 
i, pt. 2, 288. Xzmenesia, Cav. Ie. ii. 60, t. 178; DC. Prodr. v. 627. 
* Pales very narrow, almost filiform, persistent: petioles winged: rays short: 
apparent] nnial. 
28. V. nana, Dwarf, canescent-pubescent, branched from near the 
base; branches 1 to 1.5 dm. long, procumbent: leaves chiefly opposite, 
oval, obtuse or obtusish, irregularly and more often obtusely dentate, 
3 to 5 em. long, nearly half as broad, narrowed below to winged peti- 
oles; these entire or bearing two to four spreading teeth near the stem: 
peduncles solitary, terminal upon the branches: involucral bracts oblong 
to lance-linear, 8 mm. long, subequal: rays deep orange, seldom over 8 or 
10 mm. in length: achenes suborbicular, broadly winged, villous; wings 
obtuse at the summit; pappus none. — V. encelioides, Gray, Syn. FI. i. pt. 
2, 228, in part. Ximenesia enceliotdes, a dwarf form, Gray, Pl. Wright. 
Raid, encelioides, var. nana, Gray, Pl. Wright. ii. 92. — §. W. Texas, 
Laredo, Berlandier, nos. 1474, 214, Wright, coll. of 1851, Limpia, Sutton 
Hayes, no. 463; Coahuila, La Ventura, 2. W. Nelson, no. 3918. 
There has been an unfortunate confusion in the labelling or mounting 
of Wright’s no. 1407, cited by Dr. Gray as the type of his var. nana. 
The plant mounted with the label no. 1407 (which shows evidences of 
erasure and change) is V. encelioides, var. cana, while the plant which Dr. 
Gray really described is undoubtedly the one here taken as V. nana. 
