266 University of California Publications in Botany. [VOL. 3 



traces of tomentum on the leaves and in their axils and the heads 

 not so numerous: ligules white to pink, purple-veined on the 

 back ; throat of central flowers sometimes yellow : achenes obovate- 

 oblong, slightly narrowed at summit, angled by 5 prominent ribs : 

 pappus-bristles all deciduous, leaving only a narrow scarious 

 entire rim to the achene (no outer circle of setulose teeth). 



Mt. Pinos, Ventura Co., Hall, no. 6457; Santa Inez Mts.. 

 Santa Barbara Co., Brandegee; Mono Creek, Santa Barbara Co. 

 (growing near M. Clevelandi), Hall, no. 7792; San Emigdio 

 Canon, Kern Co., Mrs. W. Jasper; thence north through the 

 Coast Ranges to Humboldt Co., Marshall, Chesnut & Drew, and 

 through the Sierra Nevada Mts., to Plumas Co., Hall & Babcock. 

 no. 4433, and to Washoe Co., Nevada, Hall & Chandler, no. 4557. 

 Like M. Clevelandi, this species inhabits gravelly hillsides of the 

 Upper Sonoran and Lower Transition zones. It is perhaps most 

 abundant in the Yosemite district. 



The type specimens of M. obtusa and M. parvi flora have been 

 compared at Kew by Professor W. L. Jepson, who informs me 

 that he is unable to distinguish them by any technical character, 

 although the type of the former has little flocks of wool on the 

 leaves, these being absent from the type of M. parviflora. He 

 further adds that neither of these types has the persistent setu- 

 lose teeth crowning the achenes, so characteristic of M. Cleve- 

 landi. 



7. M. foliosa Gray, Syn. Fl. i. pt. 2, 455 (1886). M. squalida 

 Greene, Bull. Calif. Acad. ii. 152 (1886). 



Erect, from an annual root, 1.5 to 6 dm. high, much branched 

 above and very leafy nearly to the yellow-flowered heads: her- 

 bage glabrous: leaves mostly lanceolate, laciniate-pinnatifid, and 

 5 to 10 cm. long, but the uppermost reduced: heads numerous, 

 short-ped uncled : involucre 10 to 12 mm. high : achenes obscurely 

 5- angled and 2 or 3-striate between the angles: pappus wholly 

 deciduous leaving neither bristles nor crown. 



San Clemente Island, Apr., 1885, Nevin & Lyon; Santa Bar- 

 bara Island, May, 1901, Mrs. Trask; Santa Cruz Island, Jul. and 

 Aug., 1886, Greene. The last specimen cited is the type of Dr. 

 Greene's M. squalida, a condensed form 2 dm. high; the leaves 

 short and broad and with short lobes; the inflorescence more 



