COMPOSIT^E. 395 



30. BRA.CHYACT1S, Ledehour. Low brauchiug annuals, with entire 

 slightly succulent leaves, and numerous racemose or panicled heads of 

 very inconspicuous whitish flowers. Bracts of the involucre imbricate, 

 with prominent green-herbaceous tips. Rays very small, in several 

 series and suberect. Style-tips lanceolate. Acheues compressed. Pap- 

 pus copious, fine and soft, accrescent after flowering (as in Baccharis). 



B. I'roiulosa, Gray, Proc. Am. Acad. viii. 647 (1873); Nutt. Trans. Am. 

 Phil. Hoc. vii. 296 (1840), under Tripoliuni. A foot high or less, upright, 

 or branched from the base and the branches spreading: leaves 1 m.long, 

 spatulate linear, the uppermost narrower, passing into the rather broad 

 and obtuse involucral bracts: heads hemispherical, about 4 lines high; 

 rays a line long: achenes narrow, appre.s.sed-pubescent — In subsaline 

 wet soils in the Sierra Nevada, at Sonora Pass, B(jlander, and north- 

 ward. 



31. BACCHARIS, Linrnvus. Dioecious shrubs or herbs, with striate 

 or angled branches, alternate simple, often glutinous leaves, and small 

 clustered discoiil heads of white unisexual flowers. Involucre of scale- 

 like imbricated bracts. Fl. of staminate heads with tubular-funnelform 

 5 cleft corolla; of the pistillate slender-tubular, truncate or minutely 

 toothed. Style-appendages ovate to lanceolate, rarely coalescent. 

 Achenes 5— i5-castate, glabrous or pubescent. Pappus of fertile flowers 

 very fine and soft, becoming elongated in fruit. 



* HeilKiceuiiH perennial. 



1. B. Doii^lasLi, DG. Prodr. v. 400 (1<S3(5). Erect, 3—4 ft. high, .simple 

 up to the terminal corymb; leaves very glutinous, ovate-lanceolate, 

 nearly or quite entire, 3—6 in. long: bracts of involucre erose-ciliate: 

 pappus of pistillate fl. short, soft; of staminate clavellate and barbellato 

 at summit. — In moist lowlands. Sept. ^— Nov. 



* * Sujf'rutescent or ftlLrxlihi/. 



2. B.PIummerasGray. Proc. Am. Acad, x v. 48(1879). Stems tufted, 

 rigidly herbaceous from a woody base, 2—3 ft. high, simple up to the 

 cymose-paniculate summit; herbage sparingly and rather roughly pubes. 

 cent: leaves linear-oblong, 1 3 in. long, 3-uerved, irregularly, closely 

 and sharply serrate: heads numerous, 4 lines high: acheues somewhat 

 flattened and puberulent: mature pappus fuscous, nearly ^^ in. long. - 

 Northern part of Santa Barbara Co., Mrs. Bloclunan, and southward. 



3. B. glutiiiosa, Pers,, Syn. ii. 425 (1807j. Shrub 6-12 ft. high: 

 leaves lanceolate, acute, entire, denticulate or repaud-dentate, 2—3 in. 



