Contributions from the Gray Herbarium 
s. Phyllaries not herbaceous at apex. 
Phyllaries densely pilose-ciliate. 
- montana. 
Phyllaries minutely ciliolate. 
. Goldmanii. 
r. Phyllaries not indurated above the middle, t. 
t. Peduncles 3-10 mm. long; Mexico 
_ Seemannii. 
t. Peduncles 3.5-34 cm. long; South Amer- 
u. Heads large; involucre 12-16 mm 
.revoluta. 
u. Heads a involucre 7-10 m 
v. Pivlicics not ciliate with spreading 
hairs... .108. V. anchusaefolia. 
v. Phyllaries ciliate with spreading hairs 
Leaves mm. wide; achenes 
rather sparsely pilose 
v. oligodonta. 
Leaves 1.7-3.1 cm. wide; achenes 
densely silky ..105. V. Hilairei. 
q. agp see cre 2—3-seriate, w 
age tas 11-16 mm. high or more, z. 
. Leaves eauecusticled: Mexico. 
6. V.dentata. 
z. Leaves sessile or subsessile; South Amer- 
» vi 
y. Leaves acuminate at base. 
107. V. hispida. 
y. Leaves cuneate or rounded at base. 
aves opposite; Brazil. 
140. V. nudicau 
a pnphomese "8 oe and rhe 
tin Revolutae, p. 119. 
w. Involucre 5-10 mm. igs 
z. Phyllaries strongly nairited to above the 
a. 
aa. Herbs, bb. 
bb. Involucre 3-seriate . .36. V. dentata. 
te. 
bb. Involucre 2-seria 
Apgesies nearly glabrous except 
ye 
eae 
raysabout10. 52. V. mucronata. 
Pinin llaries attenuate; Poca ee and 
entral America V. tenuis. 
Phyllaries obtuse to praca Peru. 
3. v. pusilla. 
cc. Perennials, dd. 
dd. Phyllaries with strongly indurated 
base and abrupt linear 
Mebaoscte apex; Mexico and 
Central America. 36. V.dentata. 
