ASTERACEAE. 373 



narrowly lanceolate, entire or sparingly denticulate, obscurely 3- 

 nerved, 5-7 cm. long; involucres about 8 mm. high, hemispheric, in 

 small cymose clusters, the bracts tawny, destitute of green center 

 or costa. 



Very common along all streams throughout our range. April- 

 July. B. glutinosa Pers., a similar species, with smaller in- 

 volucres (5-6 mm. long) and stramineous bracts, is the common 

 species in Imperial Valley, and has been reported from the Los 

 Angeles region, but I have seen no specimens |not referable to 

 vimhiea. 



4. B. douglasii DC. Glabrous and somewhat glutinous; stems 

 herbaceous nearly or quite to the ground, erect, 12 dm. high or less, 

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

 either entire or serrulate, 3-nerved from near the base, 7-14 cm. 

 long; heads about 6 mm. high; involucral bracts erose-ciliate, thin 

 and pale with a greenish center; pappus of pistillate flowers scarious, 

 4 mm. long, soft, of staminate clavellate and barbellate at the 

 summit. 



Occasional along streams in our coast region. Ballona Creek; 

 Los Angeles River. August-October. 



5. B. plummerae Gray. Loosely pubescent throughout, not at 

 all glutinous; stems herbaceous from a woody base, 6-12 dm, high, 

 somewhat branched; leaves linear-oblong, obtuse, irregularly and 

 acutely serrate, 5 cm. long or less, obscurely 3-nerved; heads 8 mm. 

 long; involucral bracts linear; achenes somewhat compressed, 

 puberulent, obscurely 5-nerved; pappus in fruit 8 mm. long, 



Santa Ynez Mountains southward to the South Monica Moun- 

 tains; Topango Canyon, Davidson. 



Tribe 3. INULEAE. Everlasting Tribe. 

 Annual or perennial mostly white-woolly plants, with 

 alternate or opposite leaves and small dioecious heads. 

 Involucral bracts often white or scarious, imbricated. 

 Pistillate flowers mostly white, with filiform corollas. 

 Anthers caudate at base, unappendaged at apex. Pap- 

 pus capillary or none. 



Involucral bracts many; receptacle naked. 



Bracts dry, but not scarious. 21. Pluchea. 



Bracts scarious. 26, Gnaphalium. 



Involucral bracts few or none; receptacle chaffy. 

 Bracts completely enclosing their achenes; 

 pappus none. 

 Achenes gibbous. 22. Micropus. 



Achenes straight or somewhat curved. 



Receptacle columnar. 23. Stylocline. 



Receptacle globose or ovoid. 24. Psilocarphus. 



Bracts of 2 kinds, the lower completely en- 

 closing their achenes; the others chaff-like, 

 surrounding a central cluster of flowers. 25. Filago. 



