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



oval to lanceolate or linear: ligules light yellow: achenes 15- 

 ribbed and 4 or 5-angled, the summit obscurely denticulate by 

 projection of the ribs : 1 or 2 stouter pappus-bristles persistent. 



Occurs sparingly from San Diego Co. and Santa Cruz Island 

 to the San Joaquin Valley and extends to the borders of the 

 desert (and S. Utah, Parry, no. 130), but not found in the moun- 

 tains. 



2. M. Calif ornica DC., Prodr. vii. 192 (1838). 



- Scapes several, 1.5 to 3 or 4 dm. high, from a dense rosette of 

 radical leaves, bearing at their summits solitary heads of showy 

 yellow flowers: herbage conspicuously woolly when young with 

 very long and soft hairs: leaves pinnatifid into narrowly linear 

 or almost filiform lobes: peduncles occasionally bearing a few 

 scattered bractlets above : involucre 12 to 15 mm. high ; its bracts 

 linear or subulate, in about 3 ranks : ligules 12 mm. or more long : 

 bristles of the receptacle delicate, usually present: achenes nar- 

 row, lightly striate: outer pappus of 2 persistent bristles and 

 some intervening minute teeth. 



In sandy soil throughout the coastal slope, ascending the 

 mountains to about 1400 m. ; north to the Sacramento Valley. 



3. M. glabrata (Eat.) Gray, Syn. Fl. i. pt. 2, 422 (1884). 

 M. Calif ornica glabrata Eat., Bot. King Exped. 201 (1871). 



Basal branches ascending, leafy below, usually again branched 

 above and bearing several heads: herbage glabrous throughout 

 except the outer calyculate bracts of the involucre which are 

 sometimes canescently pubescent: peduncles usually with a few 

 bractlets above: leaves, flowers, etc., as in M. Calif ornica. 



Plentiful, especially in sandy places, in the Lower Sonoran 

 Zone of the Colorado and Mohave deserts; also on the coastal 

 slope at Lakeside, San Diego Co., and near Riverside (Jurupa 

 Hills, Gavilan Hills, etc.), north along the eastern side of the 

 Sierras to Oregon and in the San Joaquin Valley to Fresno Co. 

 In specimens collected near Piute Creek, by Norman C. Wilson. 

 the persistent bristles of the pappus vary from 2 to 4 in number. 



4. M. sonchoides (Nutt.) T. & G., Fl. ii. 486 (1843). Lepto- 

 scris sonchoides Nutt., Trans. Am. Philos. Soc. ser. 2, vii. 439 

 (1841). 



