1320 CARDUACEAE 
mE in several series, iri QR the outer very short, the inner long and 
OW. orolla-lobes ovate or ; nther-appendages triangular. 
ciens elongate, angled. Pappus E t bristles.—More than 50 species, 
tropieal. 
Tips of the involucral bracts spreading, bluish, much thinner than the body: inne 
bracts Mom upward: achene wing-an led. 1. O. aeon. 
Tips e involucral bracts SED light-green or dark-gree 
= a pale, linear, each wi ith a minute colored ees 
aH de not wing-angle 
B A the involucre 5-1- ribbed, the inner acute: involucre 
n 8 mm. high. 2. O. frustrata. 
Bracts TOP “the involucre 3-ribbed, the inner obtuse: involucre ; 
r 8 mm. high. 3. O. odorata. 
. O. ivaefolia (L.) Small. Stem 3-15 dm finely pubescent or some- 
times E hirsute: leaf- blades lanceolate, te ACEO ES or dti Du 
l-7 e ong, acute, with d petiole-like 
6 m hi 
«xd. 
eral tropical plants that occur in 
only in or e the lower end of the Mississippi 
Fam eg e bas 
2. O. frustrata (B. L. Ro Sinon) Small. 
Stem 5-20 dm. tall, pui pubeseent, 
with mostly ascending branches: leaf-blades 
ovate, deltoid-ovate, or on ger 2—9 
cm. long, acute or obtuse, with r ather slender petiole-like bases: involucre 
about 7 mm. high; dp sometimes slightly green-tipped: e paises pale -purplish 
or bluish, about 4 mm. long: achene stoutis ed than 4 mm. long. [Eu- 
patorium heteroetinum Chapm . not Griseb. m ocks, S pen Ya. and the 
Keys.—All year.—An endemic species. T Mec. abundant in the Cape 
Sable region and i in hammocks of the Ten Thousand Islands. 
O. odorata (L.) Sch. Bip. Stem 6-28 dm. tall, pubescent, with divergent 
branches: leaf-blades ovate to ni 4-12 em. long, acuminate, with long 
slender petiole-like base involuc e 9-10 mm, high; bracts decidedly green- 
tipped: eorolla white or ae -lilae pom 5 mm. ed e very slender, over 
ong. [Eupatorium conyzoides Vahl. |—Hammock pen. Fla. and the 
Key m UO. I., Mex , 8. A.) —AM year MES p of our three species, 
often forming 'dense "thickets on the Florida Keys. 
EUPATORIUM [Tourn.] L. Sh rubs or caulescent herbs. Leaves 
aun ave or opposite: blades entire, toothed, or dissected. Heads borne in 
ory Involuere campanulate, turbinate or cylindric: bracts appressed. 
Co oils mo pink, lilac, red, or purple. Corolla-lobes ovate or triangular. An- 
ther-appendages ovate. Achene angled. Pappus of capillary bristles. —More 
than 500 species, mostly in warm and tropieal region. —The leaves are sometimes 
whorled. 
pun —" temperate plants of various habitat 
eaf-blades dissected or pinnatifid, the e neus narrow. 
I. CAPILLIFOLIA. 
