ASTERACEAE. 393 



49. 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. Involucral 

 bracts a single series connate by their edges into a 5-15- 

 toothed glabrous green cup. Rays usually present. 

 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 palese or 

 none. 



1. L. glabrata coulteri 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. 



50. 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; 

 heads about 3 cm. broad; bracts of the involucre joined into a broad 

 campanulate-toothed cup; achenes 4 mm., long. 



Occasional on grassy hills mostly toward the coast, especially on 

 heavy soils. Santa Monica Mountains, north slope; San Pedro 

 Hills. 



51. ERIOPHYLLUM Lag. 



Annual or perennial floccose herbs or suffrutescent 

 plants, with entire or divided alternate leaves, and 

 mostly middle-sized heads of yellow flowers. Involucre 

 oblong to hemispheric, its bracts of firm texture and per- 

 manently erect. Rays usually few, short and broad. 

 Disk-flowers with slender tube, commonly glandular and 

 hairy. Style-branches truncate or obtuse. Achenes 



