Layia. COMPOSIT.E. 315 



L. heterotricha, Hook. & Arn. 1. c. Generally larger and more erect: dark glands 

 copious: rays 10 to IS: long-villous hairs of the pappus-l)ristles less abundant, all erect, the 

 inner woolly ones wanting. — Gray, 1. c. Madaroglossa heterotricha, DC. 1. c. ; Hook. Ic. 1*1. 

 t. 326. — Califoi-nia, from the Lower Sacramento Valley southward. 



* *• Rays apparently white, hut small and inconspicuous, little if at ail surpassing the disk : pappus 

 dull white. 

 L. carnosa, Torr. & Gray. Dwarf, barely a span high, diffusely branched from the base, 

 somewluit pubescent : dark glands few or wanting : leaves succulent, spatulate to linear- 

 oblong, an inch or less long, some sin\iate-]iinnatifid : pappus-bristles sparsely plumose with 

 straight villous hairs : akenes of the ray also pubescent ! — Fl. ii. 394 ; Gray, Bot. Calif. 1. e. 

 M aduroglossa carnosa, Nutt. Trans. Am. Phil. Soc. vii. 393. — Sands of tlie California sea- 

 beach, from San Diego to Marin Co , Nuttall, Parry, Bigebnc. 



* * * Rays as well as disk-flowers yellow, or the former rarely white-edged. 



-i— Pubescence hirsute rather tiian hispid : inner hairs on the pappus woolly and interlaced in the 

 manner of L. gl<in(hdosri , but mostly less densely so. 



L. elegans, Torr. & Gray, 1. c. Diffuse: stipitate glands small and sparse: leaves linear; 

 the lower pinnately toothed or parted into linear lobes: rays 10 to 12, half-inch long: pap- 

 pus white or wliitish, its copious villous hairs much shorter than the aristiform bristles. — 

 Gray, PI. Fendl. 103, & Bot. Calif, i. 369. Madarogloasa elegans, Nutt. Trans. Am. Phil. Soc. 

 vii. 393. — Common from Santa Barbara Co. southward to San Bernardino, California, 

 Nuttall, Cleveland, Parish, &c. ; also in the northern part of the State at Ukiah, Kellogg. 



-(— -{— Pubescence hispid; the stem often dark-spotted at the base of the papilhc of the stronger 

 bristles: hai sou the pappus less copious, all straight and erect: steins and branches mostly 

 upright. 

 L. hieracioides, Hook. & Arn. 1. c. Leaves from linear to oblong, mostly laciniate-den- 



tate : rays 10 to 15, small and short, little surpassing the disk: pappus dull white or rusty. 



— Gray, 1. c. Madaroglossa hieracioides, DC. 1. c. — California, from San Mendocino Co. to 



Santa Barbara, &c. ; first coll. by Douglas. 

 L. gaillardioides, Hook. & Arn. Leaves more commonly laciniate-pinnatifid : heads 



usually larger: rays 10 to 20, orange-yellow, half to three-fourths inch long: pappus dull 



white or rusty. — Bot. Beech. 357 (Tridax? gaillardioides or Lagia, Bot. Beech. 14S) ; Torr. 



& Gray, Fl. ii. 393; Gray, Bot. Calif, i. 369. — Common in W. California, from Mendocino 



Co. to Tejon ; first coll. by Lag. 



§ 2. Callichroa. Gray, 1. c. Pappus of 5 to 25 naked aristiform bristles, or 

 rarely wanting: otherwise as in the preceding. — GaUichroa, J'isch. & Meyer, 

 Ind. Sem. Ilort. Petrop. 1. c. 



Li. pentach^ta, Gray. Somewhat hirsute and viscid-pubescent, hardly hispid, erect, a 

 foot or two liigh, paniculately branched; stipitate glands minute and sparse: cauliue leaves 

 mostly pinnatifid and the lower laciniately bipinnatifid ; the lobes narrowly linear : rays 

 ample, half-inch or more long, golden- or orange-yellow : disk-akenes minutely pubescent or 

 glabrate : pappus of 5 or rarely fewer rigid and smooth bristles, sometimes even wholly 

 wanting in certain specimens apparently of very same parentage. — Pacif 1\. ]?ep. iv. 108, 

 t. 16; Bot. Calif, i. 369. — California, along the foothills of the Sierra Nevada, from Placer 

 to Fresno Co., Bigelow, Bolander, Parrg. 



L. platyglossa, Gray. Usually more hirsute and lower: stipitate glands small and sparse • 

 cauliue Icaxes linear, simply pinnatifid into short linear lobes, most of the U])per entire 

 rays half-inch long, light yellow, commonly with white tips to the lobes: disk-akenes silky- 

 hirsute: pappus of 15 to 20 upwardly scabrous stout awn-like bristles, only a little shorter 

 than the corolla. — PI. Fendl. 1. c. ; Bot. Calif. 1. c. Callichroa platgglossa, Fisch. & Meyer, 

 Ind. Sem. Hort. Petrop. 1. c, & Sert. Petrop. t. 5; Don, Brit. Fl. Card. ser. 2, t. 373; Hook. 

 & Arn. 1. c. ; Hook. Bot. Mag. t. 3719 ; Torr. & Gray, Fl. ii. 395. Madaroglossa ( Callichroa) 

 hirsuta & an gnsti folia, Nutt. Trans. Am. Phil. Soc. I.e. — Common in low grounds tlirough- 

 out W. California. 



Var. breviseta, Gray, Bot. Calif, i. 370. Pappus only half the length of corolla and 

 of the young akene : cauline leaves mostly pinnatifi.l. — S. California, in the vicinity of Los 

 Angeles, Bigelow. 



