474 COMPOSITAB. 



3. B. douglasii DC. Stems Buffrutescent at base, 4 to 5 ft. high, simple 

 up to the terminal corymb; herbage very glutinous; leaves lanceolate and very 

 acute.' or the lower ovate lanceolate, .'5 to 4 in. Long, serrulate, almost entire; 

 heads numerous in a terminal compound almost naked corymb; bracts of the 

 involucre linear or Lanceolate-linear with greenish center, the scarious margins 



erose ciliate ; receptacle broadly i Leal; pappus of pistillate flower short and 



soft, of the Btaminate 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 oppo- 

 site, 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. I'appus of many small or minute paleae and 

 awns, forming a sort of crown. (Greek trichos, hair, and koronis, top.) 



1. T. wrightii Gray. Annual; stems assurgent, 6 to 9 in. high; leaves 

 oblong or lineardanceolate, remotely serrate or entire, auricled at base, % in. 

 long or less; heads 2 to 2% lines broad; achenes 4-angled, the angles hispid- 

 ulous toward the summit; pappus of 4 barbellate bristles with an equal 

 number of intervening but very small fimbriate paleae. — (T. riparia Greene.) 



Lower San Joaquin River. Sept. 



92. BRICKELLIA Ell. 



Perennial herbs or suffrutescent plants with alternate petioled leaves and 

 white or whitish flowers in terminal or subterminal clusters of narrow heads. 

 Involucre imbricated, its bracts striately nerved. Receptacle naked. Corolla 

 slender, 5-toothed. Achenes with 10 nerves or ribs. Pappus of numerous 

 scabrous or barbellate capillary bristles mostly in a single series. (Greek 

 koleos, sheath, and anthos, flower.) 



1. B. californica T. & G. Stems many from the shrubby base, virgate or 

 paniculately branching, 2 to 3 ft. high; leaves roundish or triangular-ovate, 

 ."» ribbed and roughish, somewhat irregularly senate. 214 in. long or less; 



heads spicate or racemose along the leafy branches. 5 or 6 lines long. 10 to 

 L5-flowered, often more or less nodding; bracts of the involucre, especially the 

 inner, with thin obtuse straight tips. — (( 'oleosanthus californicus Kt/.e.) 



Gravelly stream beds of the Coast Ranges, especially toward the interior: 

 Mendocino Co.; Calistoga; Vaca Aits, and southward to Southern California. 



