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



leaves 5 cm. long in exceptional cases 5 ) : herbage minutely and 

 sparsely pubescent or nearly glabrous : involucre 5 to 7 mm. high, 

 glabrous; bracts imbricated, broadly linear or lanceolate, acute 

 or acuminate, with green middle portion and scarious margins: 

 rays commonly 10 to 40, linear to oblong, golden-yellow, 5 to 10 

 mm. long; disk-corollas irregular, the lobe nearest the ray-flowers 

 being more acute than the others and more spreading, the sinus 

 on each side of it continued further down : pappus-bristles 5 to 8. 

 Upper Sonoran and Lower Transition zones, from San Diego 

 (the type locality, where first gathered by Nuttall) to the San 

 Jacinto Mts. and San Luis Obispo Co. (ace. to Greene) ; Mohave 

 Desert near Cajon Pass, ace. to Parish: frequent in some parts 

 of its range, especially throughout the coastal slope of San Diego 

 Co. Mrs. Brandegee has gathered dwarf forms at San Diego 

 with the flowers reduced to 3 or 4 in the solitary head, which is 

 then either discoid or with one or two ray-flowers ; also florif erous 

 forms with rays as high as 60 in number. 



.2. P. Lyoni Gray, Syn. Fl. i. pt. 2, 446 (1886). 



Erect, simple below or branched throughout, 1 to 5 dm. high : 

 herbage lightly pubescent, at least the stems glabrate : leaves 2 to 

 5 cm. long: involucre about 5 mm. high, conspicuously hirsute 

 with slender hairs ; bracts nearly equal, linear, acute to subulate- 

 acuminate, with green midrib and scarious margins: flowers 

 golden-yellow : pappus-bristles varying from 8 to 12 in number, 

 somewhat dilated at base. 



At San Pedro and on Santa Catalina Island, Lyon, ace. to 

 Gray; San Pedro, Mrs. Brandegee; Wilmington, Lyon; Santa 

 Catalina Island, Brandegee; all of these localities being in the 

 Coastal Subarea of Los Angeles Co. 



P. PALEACEA Greene, Bull. Calif. Acad. i. 189 (1885). Prob- 

 ably not distinct from P. Lyoni, but smaller and more slender in 

 all its parts : involucre 3 mm. high, minutely and sparsely pubes- 

 cent; bracts nearly equal: pappus-bristles about 5, very slender 

 but paleaceous-dilated at base. Lower California : Santo Tomas, 

 Orcutt, Purpus; Chocolate Creek, Brandegee. 



P. ORCUTTII Gray, Proc. Am. Acad. xxii. 309 (1887). Also 

 near P. Lyoni : heads small : involucre villous-pubescent : ligules 

 Univ. Calif. Pub. Botany i. 130 (1902). 



