SENECIONIDE^E. 213 



* # Perennial species. 



3. S. curycephalus, Torr. & Gray. Somewhat floccose when young, 

 at flowering time glabrous: stem stout, 23 ft high, leafy: leaves 4 6 

 in. long, lyrately pinnate, the lobes or leaflets 7 15, cuneate, acutely 

 and incisely cleft: heads many, in an ample corymb: involucres ^ in. 

 high or more, with few bracteoles: rays 10 12, light yellow, long and 

 showy. In groves along rocky bases of the coast mountains from Sonoma 

 and Contra Costa counties southward. May, June. 



4. S. Greeuei, Gray. Somewhat floccose, less than 1 ft. high, leafy 

 at base: heads 1 3, large, peduncled, terminal: radical leaves roundish, 

 with abrupt or slightly cuneate base and long petioles, coarsely crenate- 

 toothed: heads % in. long, with no bracteoles at base; rays deep orange, 

 % in. long: style tips of disk-flowers penicillate and with a central cusp. 

 Under bushes, and on more open and rocky spaces among the higher 

 mountains of Napa and Sonoma counties and northward. * May, June. 



5. S. aronicoides, DC. Growing parts loosely woolly, afterwards 

 glabrate: stem stout, 23 ft. high, leafy chiefly at base, the many small 

 heads in a compound terminal cyme: leaves ovate to oblong and lanceo- 

 late, 36 in. long, irregularly and coarsely toothed, much reduced on 

 the stem, the uppermost only bract-like: involucral bracts lanceolate, 

 acuminate, not black-tipped: flowers 1020; rays none, or rarely 1 or 2. 

 Chiefly among thickets, on northward slopes of hills. April, May. 



6. S. hydrophilus, Nutt. var. Paciflcus, Greene. Very stout, suc- 

 culent, glabrous, glaucescent, the purplish coarse stems 2 4 ft. high, 

 leafy mostly at base: leaves lanceolate, the lower 59 in. long, with 

 stout petiole, the upper successively shorter and sessile, all more or less 

 denticulate : heads small, very numerous, cymose-corymbose : rays none. 

 Brackish marshes; formerly plentiful at West Berkeley, and on the 

 lower Napa River; still abundant in the Suisun marshes. July Sept. 



* * * Suffrutescent species- 



1. S. Donglasii, DC. Usually 3 ft. high, branching from the base, 

 stoutish, loosely leafy; growing parts and young leaves whitish- tomen- 

 tose, later glabrate at least the upper surface of the leaves; lower leaves 

 pinnately divided into about 5 narrowly linear revolule lobes, the upper 

 linear, entire, all with revolute margins: heads few, large, corymbose; 

 rays conspicuous, light-yellow: achenes glabrous. Frequent on dry 

 hills of the Mt. Diablo Eange from Alameda Co. southward. July Nov. 



8. S. CINERARIA, DC. Sfcout, 24 ft. high, white-tomentose : leaves 

 of firm texture, petiolate, pinnately parted, the segments oblong, obtuse, 

 more or less distinctly 3-lobed: heads many, in a terminal corymb: rays 

 10 12, short, oval. An ornamental species of southern Europe, not 

 infrequent as an escape from the gardens. 



