MADIACE^. 201 



rays pale yellow below the middle, while above it: pappus short, the bristles 

 often scarcely surpassing their copious brownish villous hairs. — A 

 beautiful species of shaded slopes on Tamalpais, Mt. Diablo, and the 

 Berkeley Hills. May, June. 



■*—*-Villous hairs of pappus-bristles more or less interlaced. 



7. B. hispidns, Greene. Scarcely 1 ft. high, branching from the 

 base, rather densely hispidulous; a few dark stipitate glands on the 

 involucre: leaves all narrow, entire: rays white, rather short and not 

 conspicuous: pappus white, of 10 aristiform bristles, with copious short- 

 villous hairs, the innermost of which are interlaced. — Mt. Diablo and 

 southward, near the higher summits. May, June. 



8. B. elegans (Nutt), Greene. Habit of the last but much larger, 

 more or less stipitate-glandular throughout: lower leaves pinnately 

 toothed; upper entire: rays yellow, % in. long: pappus white, its copious 

 villous hairs much shorter than the arisliform bristles. — More widely 

 diffused than the last, and at lower elevations. May, June. 



* * Pappus of naked arisliform bristles. 



9. B. platyglossus (F. & M.), Greene. Sparingly branching, 1 ft. 

 high more or less, hirsute and stipitate-glandular : lower leaves pinnat- 

 ifld into linear lobes: rays J^ in. long, yellow, with white tips: pappus of 

 15 — 20 upwardly scabrous stout awn-like bristles. — Common in open 

 grounds. April — June. 



* * * Pappus paleaceous or none. 



10. B. Fremouti (T. &G), Greene. Strictly erect; branching above 

 the base, 1 ft. high, minutely pubescent, not glandular: leaves pinnately 

 cut into short lobes: rays )4,—% in. long, yellow at base, white above it: 

 pappus-palese ovate to oblong-lanceolate, tapering into a subulate, awn, 

 entire at the margins and with a few long-villous hairs. — Plains of the 

 lower Sacramento, etc. April, May. 



11. B. Douglasii (H. & A.), Greene. Habit and flowers of the last, 

 but plant nearly or quite glabrous: pappus of 10 — 18 very unequal rigid 

 subulate awns, these slightly hirsute near the dilated base, Var. oligo- 

 choeta (Gray). Pappus reduced to IS marginal awns and some rudiments 

 of intervening ones. — About the Bay and northward. April — June. 



12. B. chrysanthemoides (DO.), Greene. Aspect of the preceding; 

 flowers the same: achenes destitute of pappus and all wholly gla- 

 brous.— Habitat of the last. April— June. 



13. B. nutans, Greene. Low, slender, with divergent branches above 

 the base, 3—6 in. high: leayes all linear, entire, the lower pairs opposite, 



