CARDUACEAE 1397 
re =| aaa or nearly so: involucral bracts purple 
tippec . L. pusillum. 
Stem- leaves with mainly pinnatifid or pinnatifid- -toothed 
bla . L. bonariense. 
bn 1 diffusely branched at the base: ray-flowers with pur- 
1gu 
2 
3 
4. L. REA dE 
Inner jupe of the involucre copiously pubescent. 5 
. L. linifol 
l. L. canadense (L.) Britton. Stem dm. tall, paniculate above, pub- 
AREE or sparingly hirsute: eaf- eee spatulate t to linear or nearly so, ciliate 
pr d ee rus of the 
long: disk-corollas 25 x3 , 
m [Erigeron f sis E ( HORSE- 
VE BuT on, fields and 
waste places, Es Nin the U. S.— 
fall. 
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2. L. pusillum e Britton. Drem as in 
L. canadense, but rous or nearl f- EI 
blades narrowly drea to linear; pete: 
sometime TAi bra he in 
voluere 3—4 m ong: disk-eorollas 2.5-3 | 
mm. ]lon ng. Fields, roadsides, and  waste- 
ie Fla. er La., oe ar Mass.— (WV. ? 
Mez., C. A., S. 4.)— —fal 
3. L. bonariense (L.) Small. Similar to L. n in habit: leaf-blades 
finely pubescent: longer pus of the involuere 5-6 mm. long: disk-eorollas 
3.5—4 mm. long.—Waste-places, Fla.—Nat. of S. Am — Spr. —fall. 
L. divaricatum (Miehx.) R Stem 1-3 dm. tall, diffuse, joue and 
somewhat cinereous: leaf- blades us linear to pue late, 1-4.5 em. long, 
entire: disk-eorollas less n 3 mm. long. [Erigeron divaricatus Miehx.]— 
Dry soil, waste- S i Ae i and fields, various provinces, Ala. to Tex., 
Minn., and Ill.—Sum.-fall. 
5. L. linifolium (Willd. Small. Stem racemose or paniculate above, 2-7 
dm. tall, hirsute: pid d narrowly spatulate to linear, 1.5-10 em. long, 
those of the lowe eised or laciniate: disk-corollas mostly over 3 mm. 
long. [Erigeron linifolius will} —Waste- 1 Coastal Plain, Fla. to Miss. 
and S. C.—(W. I., Mex., C. A., S. A.) —Spr.-fall 
3. BACCHARIS L. Shrubs with much- branched, sometimes fastigiate 
stems. Leaves alternate: blades leathery, entire or toothed. Heads dioecious, 
often clustered, discoid. Involucres ovoid to campanulat any-flowered: 
braets of the staminate involuere smaller than those of the SRI. Corollas 
greenish, various, those of the staminate with a funnelform throat and a long 
tube, the lobes need: those of the pistilate flowers filiform or slightly ^u- 
larged upward. Pappus of the staminate flowers shorter than that of the pistil- 
late. Achenes nearly terete, many-ribbed, glabrous.—About 300 species, Ameri- 
Leaf-blades broadest above the middle. 
eaf-blades entire 1. B. dioica. 
Leaf-blades eene toothed. 
Inner bracts of the o involucres acute: heads in 
pe panicled eluste 2. B. halimifolia. 
Inner bracts of the pistillate involucres obtuse: heads 
in sessile S nearly sessile axillary clusters. 3. B. dere 
Leaf-blades narrowly linear. 4. B. angustifol 
