1907] Hall. Compositae of Southern California. 139 



Herbage cinereous throughout except the upper surface of the 

 leaves, this green and only strigose-pubescent : leaves ovate, sa- 

 liently toothed, the larger ones 10 cm. or more long, the petioles 

 of only the narrow uppermost ones auriculate-dilated at base : 

 involucral bracts lanceolate, acute, 8 to 10 mm. long, shorter than 

 the disk: ligules orange-colored, tridentate, 1 to 1.5 cm. long: 

 achenes narrowly obovate, sparsely pubescent, glabrate; wings 

 narrow or almost none except at the summit : awns of the pappus 

 short, setiform. 



Oxnard, Ventura Co., 1901, Davy, no. 7818; Mexico, Chile, 

 Argentine, etc. 



50. COREOPSIS L. 



Mostly herbaceous plants, a few species shrubby. Heads 

 medium-sized or large, long-peduncled, solitary or in loose cymes. 

 Involucre double ; bracts of the inner series 8 to 12, erect, mem- 

 branous ; bracts of the outer series 5 to 8, narrow, loose and f olia- 

 ceous. Flowers of both ray and disk yellow in our species and 

 the ray-flowers either pistillate or neutral. Achenes flat to meni- 

 scoidal, linear-oblong to oval, the margins either smooth or ciliate 

 or winged. Pappus none or of bristles, scales, or teeth proceeding 

 from the angles of the achene. 



The species here described all fall into the section Leptosyne, 

 characterized by a single character, namely, a thickened or hairy 

 ring around the upper part of the corolla-tube of the disk-flowers. 

 As a genus, Leptosyne was first assigned the additional character 

 of possessing pistillate and usually fertile ray-flowers, but Dr. 

 Gray, in extending it to include his genus Pugiopappus, in which 

 the ray-flowers are often neutral and usually infertile, left only 

 the annular swelling of the disk-corollas to separate Leptosyne 

 from Coreopsis. There are, moreover, certain species, described 

 under Leptosyne, 29 > 30 in which the ray-flowers are fertile and the 

 disk-corollas destitute of the annulus. In L. Mexicans Gray, 31 

 the ray-flowers have fertile achenes and the disk-corollas a mere 

 trace of the annular swelling. Since there is no habital differ- 



29 L. insularis Brandegee, Eryth. vii. 5 (1899). 



so L. pinnata Bob., Proc. Am. Acad. xxvii. 176 (1892). 



si Gray, in Wats., Proc, Am. Acad. xxii. 429 (1887). 



