cylindric, prominently 8- to 10-ribbed, glabrous; pappus of pistillate flowers elon- 

 gate in fruit to more than 10 mm., much-surpassing the styles, rusty to brownish; 

 staminate heads 3.5-7 mm. long; staminate corollas 3.5-4 mm. long, about 

 equaling the narrowly clavate pappus bristles, the clavate portion slightly scaberu- 

 lous, lower part glabrous, often twisted. 



Along streams, bottomlands and in saline periodically wet soils, in s.w. N.M. 

 and Ariz, (widespread), flowering throughout most of the year; s.w. N.M., to s. 

 Calif.; n. Mex. and Baja Calif. 



2. Baccharis Emoryi Gray. 



Glabrous glutinous shrub to 5 m. tall; branchlets striate-angled, sometimes 

 fastigiate and broomlike but often more open; leaves linear-oblong or oblong- 

 elliptic to broadly oblanceolate, 1.5-6 cm. long, 2.5-10 (-25) mm. wide, usually 

 coarsely few-toothed, the uppermost narrower and often entire, acute to obtuse 

 at apex, cuneate at base, 3-nerved from base; heads solitary or in small glomerules 

 at tips of branchlets. campanulate; pistillate heads 10-14 mm. long, narrower than 

 the staminate heads; phyllaries ovate to linear, imbricated in several series, central 

 area thickened, margins scarious, erose-ciliate toward tips, especially on longer 

 innermost phyllaries; pistillate corollas capillary-cylindric, about 5 mm. long, the 

 lobes minute; achenes about 1.5 mm. long, stramineous, finely but distinctly 

 ribbed; pappus of pistillate flowers 10-12 mm. long, silky, white or faintly tawny; 

 staminate heads 6-7.5 mm. long at anthesis; phyllaries ovate to lance-ovate; 

 staminate corollas 3.5-4 mm. long, the lobes slender and recurved or coiled; 

 anthers exserted nearly their full length; pappus bristles of staminate flowers 

 barely equaling corollas, subplumose and somewhat paleaceous toward the tips. 



Along streams, arroyos, and other wet or moist areas in N.M. (Dona Ana and 

 Chaves cos.) and Ariz. (Coconino, Mohave to Cochise, Pima and Yuma cos.), 

 Sept.-Nov.; N.M., Ariz., s. Ut. and s. Calif.; n. Mex. 



3. Baccharis salicina T. & G. 



Shrub 1-3 m. tall; branchlets striate-angled, glabrous; leaves nearly sessile, 

 oblanceolate-oblong, obtuse to acute, 3-4 (-6) cm. long, 4-8 (-15) mm. wide, 

 serrate with salient teeth about 5 mm. apart, the broader leaves distinctly 3-nerved; 

 pistillate heads with 25 to 30 flowers; involucre campanulate, 6 (-8) mm. long; 

 phyllaries ovate-lanceolate, obtuse to acute, reddish-brown-tipped, marginally 

 scarious, erose, spreading at maturity; receptacle flat, naked and slightly pitted; 

 corolla filiform, 3-4 mm. long, its 5 minute linear lobes to 0.3 mm. long; pappus 

 biseriate, flaccid, to 12 mm. long, basally united into a ring; achenes 1.2-2 mm. 

 long, glabrous, 8- to 10-ribbed; staminate involucre hemispheric, 3.5-4.5 mm. 

 long; phyllaries ovate-lanceolate, obtuse to acute, marginally scarious and erose; 

 receptacle flat, naked, pitted; filiform corolla gradually funnelform, 3.3-4.3 mm. 

 long, its linear lobes about 1 mm. long; pappus equal to corolla, plumose-tipped, 

 3-4.5 mm. long, crisped; ovary abortive. 



Abundant in the higher parts of the Tex. Plains Country, less so in the lower 

 parts, and in the Trans-Pecos of Tex., Okla. (Waterfall) and N.M. (Bernalillo, 

 Rio Arriba, San Juan and Valencia cos.), usually in disturbed places, often in 

 sandy wettish or dry subsaline soil, summer-fall; Okla., Tex. and N.M. 



4. Baccharis glutinosa (R. & P.) Pers. Jara, seepwillow^, v^ater-w^ally, water- 



MOTIE. 



Shrub 10-35 dm. tall; branchlets striate-angled, glabrous, glutinous; leaves 

 punctate, sessile to indistinctly petioled, lanceolate to narrowly elliptic, tapering 

 from middle to apex and to base, nearly entire to prominently serrate (teeth of 

 larger leaves usually 3-5 mm. apart), 3-8 (-10) cm. long, 1 (-2) cm. wide, 



1607 



