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



volucre broad, 3 to 6 mm. high; bracts 10 to 15 (or 18) or in 

 depauperate plants 5 to 10 : ray-flowers as many as the bracts ; 

 ligules 3 to 8 mm. long: style-tips capitate and seldom, if ever, 

 with a minute apiculation : achenes in the typical form linear- 

 clavate, slightly rounded at summit, either perfectly smooth and 

 shining or with minute rounded papillae: pappus in the typical 

 form none. 



Southern Oregon to Lower California and the borders of 

 Arizona : in its numerous varieties and forms very abundant in 

 early spring on plains and over the lower foothills, often covering 

 the slopes for miles with its golden-yellow bloom; rare on the 

 deserts and not found in the mountains above the Upper Sonoran 

 Zone. The typical form, distinguished from the following va- 

 rieties only by the achenes, has been reported as rather common 

 around Los Angeles and may occur throughout western Cali- 

 fornia. I have not seen it south of Antelope Valley. A specimen 

 determined by Meyer, now in the Brandegee Herbarium, has 

 clavate achenes, rounded at summit, not pubescent but minutely 

 papillose ; the herbage is succulent and the heads large with broad 

 involucre, as in the sea-coast form. 



Var. gracilis (DC.) Hall, comb. nov. Burrielia gracilis DC.. 

 Prodr. v. 664 (1836). Baeria gracilis Gray, Proc. Am. Acad. ix. 

 196 (1874). Achenes linear, truncate, more or less strigose- 

 pubescent : pappus usually present. The typical form of this 

 variety has a pappus of 3 or 4 awns from small lanceolate paleae, 

 about equalling the disk-corollas. Very abundant in Southern 

 California. The following forms, most of them treated as 

 varieties of B. gracilis or as distinct species in Gray's Synoptical 

 Flora (where full synonymy), are here referred to the var. 

 gracilis. 



Var. gracilis f . nuda Hall, form. nov. Pappus none. A form 

 very close to typical B. chrysostoma but the achenes are narrower, 

 not at all rounded at the summit, and more conspicuously pubes- 

 cent. However, perfectly glabrous achenes are sometimes very 

 narrow and truncate, and all degrees of pubescence occur, so that 

 these characters cannot be used for specific diagnoses. San Fran- 

 cisquito Canon, Los Angeles Co., Hall, no. 3100, and elsewhere 

 with the typical form of var. gracilis. 



