560 PROCEEDINGS OF THE AMERICAN ACADEMY. 
* Herbs of the United States, Mexico, and Fernando do Noronha. 
well dev 
90. V. virernica, L. Spec. ii. 901; DC. Prodr. v. 616. V. poly- 
cephala, DC. 1. c.— Highly variable as to foliage, but without significant 
or constant technical differences. 
a (typical form). Leaves undulate-dentate to entire, not lobed, soft- 
pubescent beneath: rays about 6 mm. long. — Illinois to Georgia and 
Texas, common. Ervendberg’s no. 58 from Huasteca, S. Mexico, is 
placed here with doubt. 
Var. B LaciniaTa, Gray. Leaves sinuately lobed: rays as in the 
typical form. — Syn. Fl. i. pt. 2, 287. V. laciniata, Nutt. Gen. ii. 
170. V. sinuata, Ell. Sk. ii. 411; DC. 1, ¢. ahs .— S. Carolina, Dr. 
Mellichamp, to Florida, near the coast. 
Var. y insularis. Leaves lobed or undivided: rays short, 3 to 4mm. 
long, otherwise closely like the typical form.— Fernando do Noronha, 
fiidley, Lea, & Romage, 1887. Type in herb. Gray. 
+ + Wings of the stem commonly 6, usually penetrating the inflorescence: leaves 
mostly sinuate-dentate or deeply crenate: pubescence very short: pappus well 
developed, half to two thirds as long as the achene: S. W. United States and 
adj. Mexico. 
91. V. micropTera, DC. 1. c. 616.— Between Laredo and Bejar, 
a Berlandier, nos. 182, 1442; on the Rio Grande near Blancos, Schott ; 
Guadelupe, Palmer, no. 732 (coll. of 1880) ; Nuevo Leon, Berlandier, 
June, 1844; Matamoras, Gregg. 
Var. mollissima. Leaves velvety with dense somewhat tawny tomen- 
tum beneath. — Valley near Monterey, Nuevo Leon, 7 July, 1888, C. 
G. Pringle, no. 1916, also in Nuevo Leon, Berlandier, June, 1843, and 
on the Rio Coleto, Texas, September, 1850, G. Thurber, no. 8. 
+ + + Wings of the stem 5 or 6: pappus abortive, scarcely exceeding the narrow 
wing: outer involucral scales spatulate with an herbaceous tip. 
92. V.rumicifolia. Stems thick, herbaceous, pithy, finely pubes- 
cent, broadly 5(-6?)-winged: leaves alternate, elliptic-lanceolate, large, 
1.5 to 2 dm. long, 4 to 8 em. broad, sharply and doubly sinuate-dentate, 
acute, narrowed below to a, sessile and decurrent base, thin, green and 
sparsely pubescent on both surfaces; the upper leaves subentire, oblong, 
elongated, obtuse, crisped on the margins: branches of the corymbose 
_ panicle winged; pedicels sordid-villous; heads larger and more numer- 
ously flowered than in V. virginica ; involucral scales canescent-villous, 
+ Wings of the stem 4 to 5, narrow, eos attaining the inflorescence: pappus 
eloped. 
