Sneezeweed Tribe 429 



pappus of 6-8 quadrate-oblong paleae with obtuse or truncate 

 erose summits. 



In sandy soil along the coast near Port Ballona; common about San 

 Diego. April-May. 



48. LASTHENIA Cass. 



Low slender glabrous and usually succulent annuals, 

 with opposite linear or narrowly lanceolate mostly 

 entire leaves, their sessile bases connate around the 

 stem. Heads middle-sized on peduncles terminating the 

 stem and branches, composed of yellow flowers. Invo- 

 lucral bracts a single series connate by their edges into 

 -a 5-15-toothed glabrous green cup. Rays usually pres- 

 ent. Disk-flowers all fertile, 4-5-lobed. Achenes linear 

 or narrowly oblong, compressed, sometimes slightly 2-3- 

 nerved. Pappus of 5-10 firm subulate-tipped paleae or 

 none. 



1. L. glabrata Coulter! Gray. Somewhat fleshy, rarely 

 slightly pubescent; stems erect, branching, 2 dm. high or less; 

 peduncles somewhat enlarged under the erect heads; involucre 

 hemispheric; rays 5-10 mm. long; achenes narrowly obovate- 

 oblong, with obtuse edges and with minute scattered rough points 

 or glands. 



Common in saline marshes, especially along the coast. 



49. MONOLOPIA DC. 



White-woolly annuals with alternate entire or den- 

 ticulate leaves and large peduncled heads of yellow 

 flowers. Involucre hemispheric, its bracts united into a 

 cup with broad triangular teeth or distinct to the base. 

 Receptacle conical, naked. Ray-flowers 3-4-toothed, 

 bearing at the base of the ligule an oblong or roundish 

 denticulate appendage. Disk-corollas somewhat hairy 

 on the lobes. Achenes angular, black. Pappus none. 



1. M. major DC. Stoutish, nearly simple or with several 

 pedunculiform naked monocephalous branches, about 5 dm. high ; 



