

1915] 



GREENMAN — MONOGRAPH OF SENECIO 587 



Granite Falls, alt. 300 m., 28 Oct., 1911, Smith 4224 (Field Mus. 

 Herb.). 



Oregon: region of Coos Bay, 10 Sept., 1911, House 4848 

 (U. S. Nat. Herb.). 



California: Vance's Camp, Humboldt Co., 5 June, 1911, 

 Smith 3778 (Field Mus. Herb.) ; vicinity of Eureka, 20 June, 

 1907, J. P. Tracy 2571 (Univ. Calif. Herb, and Mo. Bot. Gard. 

 Herb. ) . 



5. S. aphanactis Greene, Pittonia, 1 : 220. 1888, and Fl. 

 Franciscana 464. 1897 ; Greenm. Monogr. Senecio, I. Teil, 23. 

 1901, and in Engl. Bot. Jahrb. 32 : 19. 1902. 



S. sylvaticus Gray, Bot. Calif. 1 : 410. 1876, not L. ; Jepson, 

 Fl. West. Mid. Calif. 512. 1901. 



A slender annual, 1 to 3 dm. high, glabrous or somewhat 

 tomentulose especially in the inflorescence; stem simple or 

 branched ; leaves linear to lanceolate, 1 to 4 cm. long, 1 to 12 

 mm. broad, entire to coarsely dentate or even pinnately lobed, 



glabrous or nearly so ; the lower leaves narrowed into a petio- 

 late base, the upper sessile; inflorescence terminal, few to 

 several-headed ; heads somewhat flask-shaped, 6 to 7 mm. high, 

 radiate; involucre sparingly bracteolate, glabrous to tomen- 

 tulose at the base; rays small, scarcely exceeding the in- 

 volucre; achenes appressed-canescent. 



Distribution: central California, northern Mexico and 

 adjacent islands. 



Specimens examined: 



California: Mare Island, 30 March, 1874, Greene (Gray 

 Herb, and Field Mus. Herb.), co-type; San Luis Obispo, 

 Brewer 463 (Gray Herb, and Mo. Bot. Gard. Herb.) ; San 

 Luis Obispo, coll. of 1886, Summis (U. S. Nat. Herb.) ; Avalon, 

 Santa Catalina Island, March, 1901, Trash (U. S. Nat. Herb, 

 and Mo. Bot. Gard. Herb.) ; edges of canons and alkaline 

 flats, San Diego, Brandegee 3414 (Gray Herb., Field Mus. 

 Herb., and Mo. Bot. Gard. Herb.) ; San Diego, Geological 

 Survey of California 1860-61, Cooper (Gray Herb.) ; North 

 American Pacific coast flora, Parry 170 (Gray Herb.) ; San 

 Diego, 5 Feb., 1884, Orcutt (Field Mus. Herb.). 



