394 



COMPOSITAE. 



[Vol. III. 



i£euLcL 



2. Baccharis halimifolia L. Groundsel- 

 tree or -bush. Pencil-tree. (Fig. 3834.) 



Baccharis halimifolia L. Sp. PI. 860. 1753. 



A branching glabrous shrub, s'-io" 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-den- 

 tate, i'-3' long, ]i'-2' wide, those of the branchlets 

 oblanceolate, 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, ob- 

 tuse, glutinous, appressed, the inner ones of the pis- 

 tillate heads lanceolate, acute or acutish; fertile pap- 

 pus bright white, 3"-4" long, of 1-2 series of capillary 

 bristles, much exceeding the involucre. 



Along salt marshes and tidal rivers, e.xtending beyond 

 saline infliu-nce, Massachusetts to Florida and Texas, The 

 white pappus is very conspicuous in autumn. Sept. -Nov. 



Baccharis glomerulifolia Pens., 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. 



3. Baccharis neglecta Britten. 

 Linear-leaved Baccharis. (Fig. 3835.) 



A much-branched, glabrous or slightly glutin- 

 ous shrub, 3° high or more, the branches pan- 

 iculate, slender, ascending. Leaves narrowly lin- 

 ear to linear-lanceolate, faintly 3-nerved, acute, 

 or the lower subobtuse at the apex, gradually 

 attenuate into a nearly sessile base, i'-3' long, 

 l"-3" wide, entire, or remotely dentate or den- 

 ticulate, green in drying; heads in short-pedun- 

 cled clusters; involucre of both kinds of heads 

 campanulate, 1" 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. Has been 

 referred to B. angusli/olia Michx. July-Sept. 



4. Baccharis Wrightii A. Gray. 



Wright's Baccharis. (Fig. 3836.) 



Baccharis /f';7]§'/;///.\. Gray.Pl. Wright, i: loi. 1852. 

 Herbaceous from a thick woody base, much 

 branched, glabrous, not glutinous, i°-3° high, 

 the branches straight, nearly erect, slender, stri- 

 ate. Leaves linear, sessile, i-ner^'ed, entire, 3"- 

 12" long, >2"-i" wide; heads solitary at the ends 

 of the branches, $"-(>" broad; involucre of the 

 sterile heads hemispheric, about 3" high, that 

 of the fertile ones somewhat campanulate and 

 longer; bracts of both involucres lanceolate, acu- 

 minate, with scarious margins and a green back; 

 pappus of the fertile flowers of several series of 

 tawny or purplish capillary bristles. 



Western Kansas and Colorado to Texas, Arizona 

 and Chihuahua. .\pril-July. 



