GENUS 39. THISTLE FAMILY 
1. Baccharis salicina T. & G. Willow Bac- 
charis. Fig. 4384. 
Baccharis salicina T. & G. FI. N, A. 2: 258. 1841. 
A glabrous glutinous much-branched shrub, 3°-6° 
high, the branches ascending. Leaves firm, oblong- 
lanceolate or somewhat oblanceolate, more or less 
conspicuously 3-nerved, mostly obtuse at the apex, 
narrowed into a cuneate subsessile base, 1’-14’ long, 
2”-6” wide, sparingly repand-dentate, or entire; 
heads in peduncled clusters of 1-7, the involucre of 
both sterile and fertile ones campanulate, 23’’-3” 
high, its bracts ovate or ovate-lanceolate, acute or 
subacute; pappus usually but a single series of nearly 
white capillary bristles. 
Western Kansas and eastern Colorado to Texas and 
New Mexico. May-July. 
2. Baccharis halimifélia L. Groundsel-tree or 
-bush. Pencil-tree. Fig. 4385. 
Baccharis halimifolia L. Sp. Pl. 860. 1753. 
A branching glabrous shrub, 3°-10° high, the branch- 
lets angled, sometimes minutely scurfy. Leaves thick, 
those of the stem and larger branches obovate or del- 
toid-obovate, obtuse, petioled, coarsely angular-dentate, 
1’-3’ long, 4’-2’ wide, those of the branchlets oblanceo- 
late, short-petioled or sessile, entire, or few-toothed 
toward the apex; heads in peduncled clusters of 1-5, 
those of the sterile plant nearly globose when young, 
the bracts of the involucre oblong-ovate, obtuse, gluti- 
nous, appressed, the inner ones of the pistillate heads 
lanceolate, acute or acutish; fertile pappus bright white, 
3-4” long, of 1-2 series of capillary bristles, much ex- 
ceeding the involucre. 
Along salt marshes and tidal rivers, extending beyond 
saline influence, Massachusetts to Florida and Texas. Ba- 
hamas; Cuba. The white pappus is very conspicuous in 
autumn. Cotton-seed tree. Ploughman’s-spikenard. Sept.— 
Nov. 
Baccharis glomerulifldra Pers., which has larger heads 
glomerate in the axils of the upper leaves, is doubtfully re- 
ported from southern Virginia, but occurs along the coast 
from North Carolina to Florida, and in Bermuda. 
3. Baccharis neglécta Britton. Linear- 
leaved Baccharis. Fig. 4386. 
Baccharis neglecta Britton, in Britt. & Brown, Ill. Fl. 
3: 394. 1898. 
A much-branched, glabrous or slightly glutinous 
shrub, 3° high or more, the branches paniculate, 
slender, ascending. Leaves narrowly linear to 
linear-lanceolate, faintly 3-nerved, acute, or the 
lower subobtuse at the apex, gradually attenuate 
into a nearly sessile base, 1-3’ long, 1-3” wide, 
entire, or remotely dentate or denticulate, green 
in drying; heads in short-peduncled clusters; in- 
volucre of both kinds of heads campanulate, 2” 
high, its outer bracts ovate, acute or somewhat 
obtuse, the inner lanceolate, acuminate; pappus 
of the fertile flowers a single series of capillary 
dull-white bristles. 
Nebraska to Texas and North Mexico. July—Sept. 
