458 COMPOSITE. 



times sagittate. Style-branches of perfect flowers obtuse or truncate; in 

 some penicillate. Pappus of capillary bristles, these mostly fine and 

 scabrous, sometimes coarser and barbellulate. 



Hints of the Oenera. 



* Herbs ivilh ample palmatifid leaves. 



Plants snbdioicous; flowers whitish, ... --...-.95 

 Heads large, rayless; flowers yellow, ----.__-. gtj 



* * Shrubby or sujfrulescenl; heads rayless. 



Involucre imbricated; leaves reduced and scale-like, ------ 99 



'■ of few and subequal bracts; 



Leaves small, linear or lanceolate, - -- - - - - - 100 



" broader and rounded, ---.---.-- loi 



* * * Herbaceous (a few suffrulescent); foliage various. 



Plants depressed and diffuse; rays none, -.--.... 97 



upright, slender-stemmed; 



Involucre hemispherical; rays present, --------98 



" campanulate; 



Bracts united; stems ecapiform, ------- 102 



" distinct; stems leafy; 



Pappus none, ---------- 103 



" barbellulate, -.---.-. 104 



" fine and capillary, ------- 105 



Involucre cylindrical, ----------- 105 



95. PETASITES, Tournefort. Perennial herbs, with creeping root- 

 stocks sending up early scapiform leafy-bracted flowering stems, and 

 later ample long-petioled radical leaves which are cottony-tomentose at 

 least when young. Flowers whitish or purplish, in a racemose corymb, 

 subdioecious. Achenes narrow, 5— 10-costate. Pappus elongating in 

 age, very soft and white. 



1. P. palinata, Gray, Bot. Calif, i. 407 (1876); Ait. Kew. ii. 118, t. 2 

 (1789), under Tussilago. Leaves of round-reniform outline, 7—10 in. 

 broad, palmately 7 — 11-cleft to beyond the middle, these appearing later 

 than the very early flowering stems. — Wet mountain woods from near 

 Santa Cruz northward, in the Coast Range. March. 



96. CACALIOPSIS, Gray. Floccose-woolly stout perennial, with 

 ample palmatifid leaves appearing before the flowers. Stem stout, with 

 few large rayless heads of yellow flowers. Involucre campanulate, 

 of many lanceolate-linear acuminate bracts. Corolla with cylindrnceoias 

 throat longer than the slender tube. Style puberulent below the flattish 

 V)ranches. Achenes 10-striate. Pappus copious, soft, white. 



