1907] Hall. Compositae of Southern California. 157 



Pappus-bristles long-plumose or villous below. 



Kays white or roseate, much surpassing the disk 1. L. glandulosa. 



Kays bright yellow or cream-color (sometimes white-edged). 



Inner hairs of pappus-bristles woolly and interlaced 2. L. elegans. 



Hairs of pappus-bristles all straight (no woolly inner ones). 



Ligules inconspicuous, barely surpassing the disk: leaves mostly 



laciniate-dentate 3. L. hieracioides. 



Ligules showy, much surpassing the disk: leaves all entire (rarely 

 toothed) 4. L. graveolens. 



Pappus of merely scabrous aristiform bristles or rarely wanting 



5. L. platyglossa. 



1. L. glandulosa (Hook.) H. & A., Bot. Beech. 358 (1840). 

 Blepharipappus gland ulosus' Hook., Fl. Bor. Am. i. 316 (1834). 

 Layia glandulosa rosea Gray, Bot. Calif, i. 368 (1876). 



Commonly branching from the base, 1 to 4 or 6 dm. high: 

 herbage rough with short hispid hairs among which (particu- 

 larly near the heads) are few or numerous stipitate dark glands: 

 leaves linear and entire or the lower commonly oblong and 

 toothed to pinnatifid: involucre 8 to 10 mm. high: rays showy. 

 1.5 to 2 cm. long : pappus bright white, the bristles 10 to 12, with 

 straight hairs toward the base outside and woolly tangled hairs 

 inside. 



Common on foothills of the Upper Sonoran Zone throughout 

 Southern California, extending barely to the edge of the Desert 

 Area ; north to British Columbia ; also from Idaho to New Mexico. 

 Rose-purple and pure-white ligules sometimes occur on a single 

 plant, as in specimens from near Pasadena (Greata, no. 319), 

 and in others from Victorville (Hall, no. 6208). 



Var. heterotricha (DC.) Hall, comb. nov. Madaroglossa heter- 

 otricha DC., Prodr. v. 694 (1836). Layia heterotricha H. & A., 

 Bot. Beech. 358 (1840). Blepharipappus heterotrichus Greene. 

 Pitt. ii. 245 (1892). B. glandulosus heterotrichus Jepson, Fl. 

 W. Mid. Calif. 536 (1901). Rays 8 to 18, white (rarely roseate) : 

 hairs of the pappus-bristles all straight and erect, there being no 

 crisped or woolly inner ones. Very common in the Upper So- 

 noran and Transition zones of Mt. Pinos, Ventura Co., Hall, nos. 

 6346, 6493, 6529; Fort Tejon, Kern Co., Hall, no. 6280; north to 

 Inyo and Mendocino counties. 



