ParT I, 1922] CARDUACEAE: VERNONIEAE 
Leaves of an oblong type, broadest 
above the middle, attenuate to 
an obtuse or acute base. 
Leaves 8-12 cm. long, softly and 
densely hirsute beneath. 
Leaves 6 cm. long or less. 
Involucral scales and lower leaf- 
surface resinous-dotted. 
Involucral scales and lower 
leaf-surface not  resinous- 
dotted. 
Leaf-blades of an ovate or lanceolate 
type, broadest below the middle, 
obtuse or rounded at the base. 
Upper leaf-surface not resinous. 
Upper leaf-surface conspicuously 
dotted with resin. 
Involucres 4-7 mm. high, the outer scales not 
distinctly spreading; species of the West 
Indies. . 
Lower leaf-surface more or less strigose- 
pubescent or sericeous but not whit- 
ened. 
Pappus-bristles white. 
Outer involucral scales subulate- 
tipped, with a prominent carinate 
midnerve. 
Outer involucral scales lanceolate, 
acuminate, without a carinate 
midnerve. 
Pappus-bristles tawny or pale-brown. 
Leaf-blades firm, ovate to oblong- 
lanceolate, acute or acuminate. 
Leaf-blades thin, elliptic, obtuse. 
Lower leaf-surface whitened beneath, dense- 
ly sericeous or strigose-pubescent. 
Heads 11—13-flowered. 
Leaf-blades narrowly oblong-lance- 
olate to ovate; pappus-bristles 
usually tawny; species of Porto 
Rico and St. Thomas. 
Leaf-blades broadly ovate, firm in 
texture; pappus-bristles white; 
species of Jamaica. 
Heads 18—21-flowered; species of Cuba. 
Leaf-blades broadly elliptic to ob- 
long-ovate, veiny. 
Leaf-blades narrowly oblong with 
parallel sides, without conspicu- 
ous lateral veins. 
Heads large, many-flowered; leaves without resin- 
ous dots; species of Mexico. 
Inner involucral scales obtuse or rounded, the 
: outer only acute. 
Inner involucral scales constricted below 
a dilated tip 2-3 mm. wide; leaf-blades 
papillose-scabrous above. 
Inner involucral scales narrowed to a tip 
1 mm. wide or less; leaf-blades glabrous 
and shining above. 
Inner involucral scales sharply acuminate. 
Leaf-blades linear to linear-oblong, not more than | cm. 
wide, revolute, sericeous or pubescent beneath; 
inflorescence normally oblong, of short divari- 
cately spreading cymes from the upper axils. 
Leaf-blades linear-lanceolate, 4-10 mm. wide, 
with evident lateral veins. 
Leaf-blades linear-lanceolate, 3-5 mm. wide, 
one-nerved; middle and outer involucral 
scales glabrate; pappus-bristles pale purplish- 
brown. 
Leaf-blades linear, 1-4 mm. broad, one-nerved; 
involucral scales densely strigose; pappus- 
bristles pale-brown to nearly white. 
Leaf-blades merely pubescent beneath, not 
sericeous. 
Leaf-blades densely sericeous beneath, not 
punctate above; heads 18—21-flowered. 
10. 
113). 
14. 
ie 
18. 
19. 
14. 
20. 
21% 
Ve 
V. 
Ve 
Ve 
Bile 
V. 
V. 
We 
Wig 
. argyropappa. 
. remotiflora. 
. acile pis. 
hirsutivena. 
. clenophora. 
icosantha. 
arborescens. 
borinquensis. 
membranacea. 
. sericea. 
permollis. 
gnaphaliifolia. 
. angustata. 
. Schiedeana. 
. Seemanniana. 
. vernicosa. 
gnaphaliifolia. 
racemosa. 
- commutata. 
