} 
544 PROCEEDINGS OF THE AMERICAN ACADEMY; 
%* * Pales linear-oblong, entire or 2-3-toothed: annuals. 
+ Achenes broadly winged from the summit to the base. 
29. V. ENCELIOIDES, Benth. & Hook.f. Leaves appressed-pubescent 
but green above; petioles (at least of the upper leaves) provided on each 
side with a wing which broadens towards the base into a semi-ovate 
incised stem-clasping auricle: outer involucral scales long, green, much 
surpassing the disk: wings of the achene rather broad, acutish at the 
apex. — Benth. & Hook. f. acc. to Gray, Bot. Calif. i. 8350; Gray, Syn. 
Fl. i. pt. 2, 288, in part. Ximenesia encelioides, Cav. 1.¢c.; DC. 1. e. 
— Florida, Curtiss, nos. 1503, 5650, Palmer, no. 291; Texas, Heller, 
no. 1785 ; Mexico, San Luis Potosi, Parry & Palmer, no. 468, State of 
Tamaulipas, Victoria, H. W. Nelson, no. 4425; Cuba, Wright, no. 3611. 
Naturalized in the warm parts of the Old World and cultivated in a broad- 
leaved form (Ximenesia encelioides, var. hortensis, DC. 1. c.). 
— Var. cana. More canescent throughout, even the upper surface of 
the leaves usually whitish with copious appressed pubescence : involucral 
bracts shorter, subequal. — Ximenesia encelioides, var. § cana, DC. 
c.; Gray, Pl. Wright. ii. 92. —'Texas, Laredo, Berlandier, nos. 2068, 
2074; S. W. Texas, Wright, no. 352, Palmer, no. 617; New Mexico, 
Fendler, no. 421; Cuba, Combs, no. 577; Hawaiian Isls., Hil/ebrand. 
Var. exauriculata. Pale green annual: petioles entirely naked and 
slender or rarely the upper bearing a divaricate usually oblong subentire 
lobe on each side of the base: scales of the involucre subequal, scarcely 
or not at all surpassing the disk: wings of the achene broad, corky, ob- 
tuse at the apex. — V. encelioides, Gray, Syn. FI. i. pt. 2, 288, in part; 
Hemsl. l.c. Ximenesia sensi Rothrock in Wheeler, Rep. vi. 163. 
— Kansas, Hitchcock, no. 277; Colorado, in the Arkansas Valley near 
Pueblo, Greene, Colorado Springs, Miss Mudford ; Arizona, on the Little 
Colorado, Sitgreaves Exp., Thurber, no. 667, Rothrock, no. 772, 
Pringle ; Mexico, Coahuila, Palmer, no. 2064, Sonora, Hartman, no. 
229, without locality, Rose, no. 3076. 
+ + Achenes narrowly winged or only winged near the summit. 
30. V. avstratis, Baker in Mart. Fl. Bras. vi. pt. 8,215. Xime- 
nesia microptera, DC. 1.¢.; Hook. & Arn. in Hook. Jour. Bot. iii. 316; 
Griseb. Symb. Fl. Argent. 195, X. australis, Hook. & Arn. in DC. 
l.c. vii. 291.— South America, Buenos Ayres, Bacle ; Concepcion del 
Uruguay, Lorentz; Central Paraguay, Morong, no. 98; Bolivian Pla- 
: may Bang, no. 1003 ; also N. E. Mexico at Matamoras, Berlandier; 
a | rom description we cannot separate V. aurita, Philippi, 
o ace del. Mus. Nat. Chile, Bot. 1891, p. 48. 
