370 COMPOSITE. Layia. 



8. L. platyglossa, Gray. More or less hirsute as well as glandular, loosely 

 branching : lower leaves commonly pinnatifid : rays large, cuneate-obovate, bright 

 light yellow, and commonly with whitish tips to the lobes : disk-akenes silky-hir- 

 sute : pappus of 15 to 25 upwardly scabrous stout and rigid awn-like bristles, which 

 are usually only a little shorter than the corolla. PL Fendl. 103. Callichroa 

 platyglossa, Fischer & Meyer, Ind. Sem., & Hort. Petrop. t. 5 ; Brit. Fl. Gard. ser. 2, 

 t. 373; Bot. Mag. t. 3719. Madaroglossa hirsiita & M. angustifolia, Nutt. 



Var. breviseta, Gray. Pappus barely one half the length of the corolla or of 

 the akene : leaves mostly pinnatifid. 



Common throughout the whole western portion of the State : the variety, Los Angeles, Bige- 

 low. The ordinary form is familiar in cultivation. About San Francisco it is popularly named 

 Tidy-tips. 



3. Pappus of subulate awns or of chaffy scales, either naked or margined vnth 

 scanty long villous hairs at base, or none : receptacle chaffy throughout : akenes 

 oblong-obovate : herbage less hispid or hirsute than in the foregoing, and wholly 

 destitute of glands. CALLIGLOSSA, Gray. (Calliglossa, Hook. & Arn. Oxy- 

 ura, DC. Calliachyris, Torr. & Gray.) 



These plants all look very much alike, and (excepting L. Fremontii) are hardly distinguishable 

 in aspect ; yet they differ in such particulars that they cannot be reduced to one or even two poly- 

 morphous species. The scales of the involucre are woolly inside at the summit and margins of 

 the infolded portion, most so in L. Fremontii. The rays in all are ample, cuneiform, and 3-lobed 

 at the end, yellow, or sometimes with nearly white tips. 



L. DOUGLASII, Hook. & Arn., which is known only by a specimen collected "between the 

 Narrows and the Great Falls of the Columbia " by Douglas, and preserved in the Hookerian herba- 

 rium, appears to be a species intermediate between the present section and Madaroglossa. See 

 Proc. Am. Acad. ix. 104. 



* Receptacle flat : pappus present : disk-akenes more or less villous. 



9. L. Fremontii, Gray. Diffusely branching, slender, a span or two high, 

 puberulent and somewhat hirsute : leaves mostly pinnately parted and with short 

 linear-oblong divisions : scales of the involucre very woolly inside at the infolded 

 portion : rays deeply 3-lobed : pappus of about 12 ovate- lanceolate and subulate- 

 pointed chaffy scales, about the length of the akene, with some interposed attenu- 

 ated villous hairs resembling those of the akene but longer. PI. Fendl. 103. 

 Calliachyris Fremontii, Torr. & Gray, in Bost. Jour. Nat. Hist. v. 140. 



Valley of the Sacramento, Fremont, Stillman, Hartweg. Also near Auburn, Placer -Co., 

 Bolander. 



10. L. Calliglossa, Gray. Loosely branching, a foot or so high, rather glabrous, 

 but the leaves (pinnately parted, or on the branches entire and small) thickly ciliate 

 with short hispid bristles : rays commonly paler or whitish at the tips : pappus of 

 10 to 18 very unequal scabrous or near the base occasionally somewhat barbellate- 

 ciliate awns. PI. Fendl. 103. Calliglossa Douglasii, Hook. & Arn. Oxyura 

 chrysanthemoides, Lindl. Bot. Eeg. t. 1850; Fischer & Meyer, Hort. Petrop. t. 6. 



Var. oligochaeta, Gray. Pappus of only two awns in many or most of the 

 flowers, the others reduced to little scales. 



Not rare through the western part of the State ; the variety at Petaluma, and Santa Rosa 

 Valley, Newberry, Bolander. 



* * Receptacle strongly convex : pappus none : disk-akenes glabrous. (Oxyura, DC.) 



11. L. chrysanthemoides, Gray. Like the preceding in aspect, or leaves 

 sometimes more scabrous-pubescent and less ciliate : akenes broader and glabrous, 

 and with no epigynous disk, the dilated base of the corolla covering their apex. 

 Oxyura chrysanthemoides & Hartmannia ciliata, DC. 



Hillsides and low grounds, near San Francisco, &c. Rays, as in the foregoing, about half an 

 inch long, deep yellow, the tips inclined to be whitish. 



