nearly cylindrical, about 10-striate. Pappus a single series of slender scabrous
or"minutely barbellate-serrulate bristles.—Perennial herbs (natives of
the Southern United States and Oregon), sparingly branched ; with opposite
or alternate tripli-nerved leaves, and rather large corymbose heads. Flowers
pale purple.
§ 1. Leaves mostly opposite, cordate, crenate, petioled, Z-nerved from the base,
veiny : involucre rather shorter than the flowers.
1 . B. cordifolia (Ell. 1. c .) : stem, paniculate-corymbose at the summit;
leaves all opposite, somewhat triangular-cordate, acuminate, minutely pubescent
and thickly dotted with resinous globules beneath, crenate-toothed ;
corvmb loose, the branches bearing 1-3 pedunculate heads; bracts setaceous;
scales of the involucre rather rigid; the outermost subulate, loose or bracteo-
late somewhat shorter than the obtuse oblong-linear imbricated interior
ones ; branches of the style much exserted ; achenia nearly glabrous : pappus
(purplish) persistent.—Eupatorium Brickellia, DC. prodr. 5. p. 182.
V Hill-sides, western districts of Georgia, Elliott. Middle Florida, Dr.
Chapman! Aug.-Sept— Stem about 3 feet high terete. Leaves about 3
inches long; the uppermost merely truncate at the base. Heads half an
inch long, 40-50-flowered. Style with a depressed villous bulb. Achenia
when youug minutely hairy towards the summit.
2. B. srandiflora (Nutt.): stem paniculate at the summit; leaves cordafe-
trianeular, acuminate, pubescent or nearly glabrous, dotted with resinous
globules beneath, coarsely or incisely dentate-serrate; the lower mostly op-
nosite the others alternate; heads subsessile and glomerate (3-5 together) on
the simple branches of the panicle; scales of the involucre imbricated in
several series; the inner ones linear-oblong, rather acute; the exterior short,
ovate, appressed, produced into- a subulate spreading appendage; branches
of the style slightly exserted; achenia glabrous when mature; pappus
(white) deciduous.—-Nutt.! in trans. Amer. phil. soc.Jn. ser.) 7. p. 287.
Eupatorium? grandiflorum, Hook. fl. Bor.-Am. 2 .p . 26. r , , ,
Low hills between the north and south branches of Lewis & Clarke s
River, Oregon, Douglas; and from this region to the Rocky Mountains,
Nuttall! Upper plains of the Platte? Dr. J am e s !-Manifestly allied to
the preceding species; the heads about the same size. Flowers white, ac-
cording to Hooker; but evidently tinged with purple m the specimen of Dr.
James.
§ 2. Leaves all alternate, oblong-lanceolate, small, sessile, not sprinlded with
resinous dots, obscurely tripli-nerved, entire: inner scales of the involucre
longer than the flowers.
3. B. oblongifolia (Nutt.): slightly viscid-puherulent; leaves numerous,
narrowly oblong, mucronulate, tapering to the base, scarcely veined ,
beads solitary or 2-3 together, terminating the corymbose-paniculate
l e a f y branches; scales of the involucre imbricated in 3 or 4 series; the exterior
shorter, lanceolate-oblong, often obtuse; the interior linear, elongated,
acute or mucronate; branches of the style scarcely exserted; achenia slendeGmverbmsPo
fX leO r ^ t n d Wahlamet, Nuttall /-L e a v e s about an
inch long. Heads 8-10 lines in length. Habit different from the other species.
The plant is viscid, and has a heavy odor, according to Nuttall; who
states that the flowers are yellowish [oehroleucous?].
16. EUPATORIUM. Tourn. inst. t. 259 ; L in n .; Geertn. flr. t. 166;
DC. prodr. 5. p. 141.
Heads 3- 100-flowered. Involucre cylindrical or campanulate; the scales
imbricated in 2-3 or more series, or sometimes nearly equal in a single series.
Receptacle flat, naked. Corolla tubular-infundibuliform or often with
a campanulate limb, 5-toothed, frequently dilated at the base. Anthers included.
Branches of the style mostly exserted and elongated, cylindra-
ceous or somewhat flattened, obtuse. Achenia 5-angled, without intermediate
stri®. Pappus a single series of very slender capillary bristles, scabrous or
minutely serrulate.—Perennial herbs or somewhat shrubby plants (the greater
portion American), with opposite (sometimes alternate or verticillate) simple
or rarely divided leaves. Heads mostly corymbose. Flowers purple,
blue, or white.’ Leaves, involucre, corolla, and achenia often sprinkled with
resinous globules; the former rarely impressed-punctate.
§ 1 . Heads cylindrical, 5-60-flowered: scales of the involucre numerous,
closely imbricated in several series, appressed, obtuse, strongly striate; the
miter ones shortest: leaves opposite or rarely alternate.
1 . E- ivcefolium (Linn.): herbaceous; stem terete, somewhat hispid;
leaves opposite, narrowly lanceolate, tapering to each end, scarcely petioled,
3-nerved, subserrate, glabrous; corymb trichotomous, loose; heads oblong,
pedicellate, 15-20-flowered; scales of the involucre few, erect, striate, obtuse.
DC.—Linn, amcen. acad. 5. p. 405, <$• spec. (ed. 2.) 2. p . 1174 ;
Swartz, obs. p. 301; DC. prodr. 5. p. 146.
/I. Ludovicianum: leaves less attenuated at each end, often rather obtuse;
the uppermost short and nearly sessile; corymbs more dense.—E. neurolepis,
Torr.! herb. E. caloeephalum, Nutt.! in trans. Amer. phil. soc. (n. ser.)
7. p. 286. Liatris oppositifolia, Nutt. ! in Sill. jour. 5. p. 299.
Open woods or fields, Louisiana, near New Orleans, Tainturier! Nuttall!
Dr. Ingalls! Dr. Riddell! Jackson, Dr. Carpenter! and Alexandria,
Western Louisiana, Dr. Hale! July-Nov.—Stem branched, 3-5 feet high.
Lower leaves about 2 inches long, broadly lanceolate, rather sparingly serrate
; those of the numerous branchlets very short. Corymbs with 6-20
heads, more contracted than in the West Indian plant. Scales of the involucre
about 20 ; the inner ones somewhat dilated and colored (purplish) at
the summit. Flowers light purplish-blue.—We have only seen West Indian
specimens of E. ivasfolium /3. D C .; which has more pointed leaves
than our plant, but appears scarcely to differ in other respects. This is
our only representative of a large and marked group of tropical American
species.
§ 2. Heads cylindrical, 5-10-flowered : scales of the involucre numerous, colored,
obtuse, slightly striate, imbricated in several series; the outermost
much shortest (style bulbous at the base): herbaceous: leaves large, mostly
verticillate: flowers purplish.
2. E . purpureum (Linn.) : stem stout, simple, fistular or nearly solid,
pubescent or glabrous; leaves (3-6-nately) verticillate or rarely opposite,
oblong-ovate or lanceolate, more or less petioled, acuminate, veiny, scabrous or
glabrous above, somewhat pubescent beneath and minutely dotted with resin-
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