570 



COMPOSITE. 



Evergreen shrubs. 



Leaves obovate or cuneiform 1. B. pilularis. 



Leaves lanceolate, willow-like 2. B. viminea. 



Herbaceous perennial; herbage very glutinous 3. B. Douglasii. 



1. B. pilularis DC. Shrub, 2 to 5 ft. high; branchlets angular; 

 leaves sessile; obovate or cuneiform, \ to 1 in. long, coarsely or 

 sinuately few-toothed, or occasionally entire; heads 2 or 3 in the axils 

 or several in a terminal cluster, short-cylindrical or ovoid, 2 or 3 

 lines long, the outer bracts broadly, the inner narrowly oblong, some- 

 times denticulate at apex; pappus of the pistillate flowers becoming 

 4 or 5 lines long, that of the staminate flowers dilated at apex into a 

 lanceolate appendage. 



Common in the Coast Ranges on low hills, high mountain slopes, or 

 on the coast sand dunes (especially in a prostrate form), frequently 

 gregarious: Southern California; Monterey; San Francisco; Alameda; 

 Oakland Hills; Yaca Mountains. 



2. B. viminea DC. Mule Fat. Distinctly shrubby, the stems 

 loosely branching, very leafy, 5 to 7 ft. high; branches striate-angled; 

 herbage scarcely glutinous; leaves lanceolate, acute at both ends, 

 entire or sparingly denticulate, 1 to 3 in. long, very willow-like; 

 heads 2 to 3 lines high, rather numerous in terminal corymbs or the 

 clusters on short lateral branches and somewhat racemose; bracts of 

 the involucre very thin, chartaceous, broadly lanceolate or the outer 

 ones ovate, with scarious margins, erose and mostly villous-ciliate; 

 receptacle flat; pappus of the fertile flowers of smooth bristles. 



Stream-beds from the Feather River and Putah Creek to Napa 

 Valley and southward through the Coast Ranges. July-Aug. 



3. B. Douglasii DC. Stems suflrutescent at base. 4 to oft. high, 

 simple up to the terminal corymb; herbage very glutinous; leaves 

 lanceolate and very acute, or the lower ovate-lanceolate, 3 to 4 in. 

 long, serrulate, almost entire; heads numerous in a terminal com- 

 pound almost naked corymb; bracts of the involucre linear or lanceo- 

 late-linear with greenish center, the scarious margins erose-ciliate; 

 receptacle broadly conical; pappus of pistillate flower short and soft, 

 of the staminate clavellate at summit. 



Moist lowlands: abundant in the salt marshes about San Francisco 

 Bay, thence southward to Southern California. 



Tribe 11. Eupatorieae. Eupatory Tribe. 



91. TRICHOCORONIS Gray 

 Slender herb, the stems branching, weak or at base creeping. 

 Leaves opposite, sessile. Flowers flesh-color, in slender peduncled 

 heads terminating the branches. Receptacle convex, naked. Bracts 

 of the involucre herbaceous or somewhat membranous, equal and 

 nerveless, 12 to 18. Corolla abruptly much dilated above the narrow 

 tube. Pappus of many small or minute puleae and awns, forming a 

 sort of crown. (Greek triehos. hair, and koronis, top.) 



