394 



COMPOSITAE. 

 2. Baccharis halimifolia L, 



[Voi,. III. 



Groundsel- 

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

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



A branching glabrous shrub, 3-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, Yi f -2' wide, those of the branchlets 

 oblauceolate, 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, i"-\" long, of 1-2 series of capillary 

 bristles, much exceeding the involucre. 



Along salt marshes and tidal rivers, extending- beyond 

 saline influence, Massachusetts to Florida and Texas. The 

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



Baccharis glomerulifdlia 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. 



3. Baccharis neglecta Britton. 



Linear-leaved Baccharis. (Fig. 3 8 35-) 



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, \'-}/ 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. anguslifolia Michx. July-Sept. 





4. Baccharis Wrightii A. Gray. 

 Wright's Baccharis. (Fig. 3836.) 



Baccharis Wrightii A. Gray, PI. Wright. 1: 101. 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-nerved, entire, 3"- 

 \2" long, y z f, -\ n wide; heads solitary at the ends 

 of the branches, 5 // -6 // 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. April-July. 



