1398 CARDUACEAE 
: B. dioica Vahl. Shrub 8-25 dm. tall: leaf-blades spatulate, often broadly 
, to obovate-spatul 1-3 em. long: pistillate involucres with ovate-obtuse 
outer bracts and Tuned Maneeolate acuminate 
r braets: achene 1-1.5 mm. long.—Ham 
mocks, Everglade UM Fla.— (W. I. \—All 
2, B. halimifolia L. Shrub 9-40 dm. tall, 
resinous: leaf-blades ee to e llip- 
i hem, at 
and Mass.—(W. I., Mex., C. A.)— — Sum. -fall. 
3. B. glom piace rs. Shrub 8-30 dm 
tall, barely resinous: leaf-blades spatulate to cuneate obovate, 2-5 cm. long, 
often oo e othed: pistillate m 5-6 m ong; inner braets oblong- 
e 1.5 mm. long.—Salt-marshes dud Eu poe Plain, Fla. 
to N .C. a 2d puede in the BONO of the Fla. peninsula— (IV. I.)— —Fa ll- 
wint. or all year S. 
B. angustifolia Michx. Shrub 5-25 dm. tall, resinous: leaf-blades nar- 
rowly linear, 1-8 em. long, entire or nearly so: pistillate involueres 4—5 mm. 
long; inner bracts ena achene 1-1.5 mm. long.—(FALSE-WILLOW.)—Salt 
marshes, brackish swam and low hammocks, Coastal Plain, Fla. to Tex. and 
N. C— —(W. I.)—Fall or a vear S 
44. PLUCHEA Cass. Herbs with often conspicuously pubescent and cam- 
phor-scented foliage, or shrubs. Leaves alternate: blades usually toothed, often 
prominently veined. Heads borne in corymb-like or glomerate cymes. In- 
volueres turbinate, campanulate, or hemispheric, rather many-flowered: bracts 
unequal, the inner much longer and much narrower than the outer. Flowers 
pink to rose-purple. Pistillate flowers marginal: corollas ie Perfect 
flowers central: corollas with a funnelform or campanulate throat: lobes tri- 
angular lanceolate. Pappus a single series of capillary bristles —About 35 
species, in warm and temperate regions.—MARSH-FLEABANES. 
Plant perennial. 
Leaf-blades entire: stem wo ody. I. ODORATAFE. 
Leaf-blades toothed : stem here BUE II. FOETIDAE. 
Plant annual. 
Leaves not decurrent, the stem terete, not winged. III. CAMPHORATAE 
eaves decurrent, the stem thus winged. IV. Sects TEN: 
I. ODORATAE 
Shrubby much-branched plant with heads in erect rather dense 
corymbs. 1. P. odorata. 
FOETIDAE 
Outer braets of the involucres acuminate. 
Leaf-blades broad at the base, and cordate-clasping. 2. P. foetida. 
Leaf-blades acute or merely rounded at the base, not clasp- 
3. P. tenuifolia. 
ng. 
Outer TIE of the involucres obtuse or merely acute. 
pp d white: upper stem-leaves little shorter than the 
4, P. longifolia, 
Pus buff: upper stem-leaves much shorter than the 
. lower. 5. P. imbricata. 
