1907] HallCompositae of Southern California. 39 



4. G. camporum Greene, Man. Bot. Reg. S. F. Bay 171 



(1894) ; Fl. Fr. 361 (1897) ; Perredes, 1. c. ff. 2, 4. 



Stems several, erect, 3 to 6 dm. high, herbaceous throughout : 

 basal leaves commonly numerous, oblanceolate-spatulate, obtuse, 

 serrate, 10 cm. or less long, 1 to 1.5 cm. broad; cauline leaves 

 oblanceolate or oblong, mostly acute, 5 cm. or less long, .5 to 1.5 

 cm. wide : heads rather numerous in an open leafy panicle : invo- 

 lucre 10 to 15 or 20 mm. broad ; the short outer bracts linear- 

 subulate, squarrose-deflexed ; inner bracts lanceolate-subulate, 

 with spreading tips or erect : mature disk-achenes compressed, 

 minutely biauriculate or unidentate at summit : pappus-awns 2 

 or 3 or more. 



In heavy clay soil, from San Diego Co. to middle California : 

 National City, San Diego Co., Jul. 3, 1885, Cleveland; mesa 

 north of San Diego, Chandler, no. 5358; Ramona, Jul. 10, 1903. 

 Brandegee; Cuyamaca Mts., Jul. 8 and Oct. 15, 1894, Brandegee. 

 also (at Julian) Chandler, no. 5460; Inglewood, Los Angeles Co.. 

 Hall, no. 6726 ; Elizabeth Lake, Los Angeles Co., Hall, no. 6719. 

 Abundant on adobe mesas from University Station, Los Angeles, 

 .south and west, whence gathered for the wholesale drug trade. 

 Summer. 



7. PENTACHAETA Nutt. 



Low and very slender annuals with narrowly linear and entire 

 alternate leaves. Heads small, solitary or somewhat clustered at 

 the ends of more or less naked branches, nodding in the bud. 

 Receptacle convex. Involucre turbinate-campanulate, its bracts 

 IE 2 series, narrowly oblong, thin or membranous, scarious- 

 margined, mucronulate, appressed. Disk-corollas yellow or rose- 

 red, very slender; rays white, pink, yellow, or none. Achenes 

 oblong, flattened, hirsute-pubescent. Pappus of 5 to 12 slender 

 bristles, often much reduced, or all obsolete. 



Involucre glabrous, its bracts very unequal 1. P. aurea. 



Involucre pubescent, its bracts nearly equal 2. P. Lyoni. 



1. P. aurea Nutt., Trans. Am. Philos. Soc. ser. 2, vii. 336 

 (1841). 



Diffusely branched, 1 to 3 dm. or more high (6 dm. high and 



t 5 



