SEES T TR 
S B 
= 
Pu 
CARDUACEAE 1419 
Involucre hemispher campanulate: 
ets broad, oe. pF dis outer series 
scarcely larger than those of the inner. Ray- 
flowers several: ligules white, inconspicuous. 
Disk-flowers numerous: corollas wi t 
WWW, 
ŢQ JES 
Hy, 
\ 
or minute.—About 4 species, tropical. 
1. V. alba L. Stem and branches 2-9 dm. Lu. 
long, finely pubescent: leaf-blades elliptic, or lanceolate, or narrower, 3— 10 em. 
long, sessile: involuere broadly campanulate, the larger | eir abou m. 
long: ud about 2.5 mm. long. [Eclip ta alba (L.) Hassk. ]- Waste -places, 
stream-banks, and low grounds, various provinces, Fla. "n Tex., N. M., Neb., 
and Mass. Introd. NE.—(W. I., Mex., C. A., S. A.)—Sum fall or all year S. 
67. MELANTHERA Rohr. Perennial, erect herbs. Loane o 
blades entire, toothed, or hastate- lobed. Heads discoid, appeari ng a 
S 
road, in 2 or 3 series. Throat of - white corolla much longer iban the 
tube. Filaments generally as long as s black-tipped anthers or nearly so 
Stigmas often flattened, mostly subulate. Achene compressed- angular, 
somewhat obpyramidal, truneate.—About 12 species, tropical American 
Leaf-blades ovate to deltoid in outline. 
Involucral bracts and chaff e obtusish, or merely short-acuminate. 
^ Leaf-blades less than 5 c long: chaff short-acuminate. 
Mi o lo e of the leat-blade very narrow 
ith a roundish few toothed tip. 1. M. parvifolia. 
Middle lobe “ot the lent blade if pr resent, broad and 
: short with an exp d many toothed t tip. 2. M. radiata. 
Leaf-blades over 5 em. long: chaff acute or bluntly tipped. 3. M. deltoidea. 
Involucral M and eh haf long-acumina e. 4. M 
Leaf-blades elliptic to linear in outl 
volucral race fully as long B the disk, linear-lanceolate, 5 
6 
. M. ligulata. 
inv olucral bracts shorter than the disk, rhombic- ovate. 
. M. angustifolia. 
1. M. parvifolia Small. Stems often several together, 3-8 dm. tall, very 
rough-hispidulous, slender, sparingly branched: leaf-blades prominently hastate, 
e 
nx , or ger, the lateral lobes 
prominent, coarsely toothed or entire, the 
iddle lobe elongate, contracted between the 
rather short: heads few, usually very long- 
pedun ma larger bracts of the involucre 
5-7 m ong.—Pinelands and coastal a 
dunes, E im Fla. and the Keys.—All yea 
2. M. radiata Small. Stems radially 
spreading from a oe root, 1—4 dm. long: 
- ia Sra ovate, 1 . lo ong, entire and 
arsely serrate, or ii eta y lobed and 
irregularly toothe d, the middle lobe often 
ovate: larger bracts of the involucre ovate, 
1 Contributed by Edward Johnston Alexander. 
