432 COMPOSITiE. 



closed completely by their iuvolucral bracts, their terminal areola not 

 protuberant. Disk-achenes slender, abortive; no pappus to any, whether 

 of ovary or disk. Receptacle bearing a circle of chaff between ray and 

 disk, this and all the achenes and bracts deciduous at maturity. 



* Rays small and inconspicuous. 



1. L. ramosissima, Nutt. Trans. Am. Phil. Soc. vii. 391 (1841). Can- 

 escent with a loose silky pubescence, 1 — 4 ft. high, diffusely paniculate: 

 lowest leaves spatulate-obovate, cauline lanceolate and linear, all entire: 

 heads }4, in. high, }£ in. broad in expansion of rays: achenes 1^2 lines 

 long. — Mountain districts north and south, and in both Coast Range and 

 Sierra. June— Oct. 



2. L. coiiaresta, Greene, Bull. Torr. Club, x. 87 (1883). Tall as the 

 preceding and robust, not paniculate, but the heads twice as large, 

 densely glomerate on short branches; lowest leaves oblanceolate, re- 

 motely serrate: achenes 2 lines long. — Habitat of the last. 



* * Rays more showy, the expanded heads an inch broad. 



3. L. dichotoma, Benth. PI. Hartw. 317 (1849). Stem 1-2 ft. high, 

 dichotomously paniculate; branchlets puberulent: cauline leaves spat- 

 ulate, the lower ones toothed, those of the branchlets short, hirsute-cil- 

 iate as are also the involucral bracts, sometimes bearing a few glands: 

 achenes obovate, the ventral face with no keel or nerve. — Plains of the 

 upper Sacramento; also in Lake Co. May — Sept. 



4. L, glandulosa, Gray, Proc. Am. Acad. xvii. 219 (1882). Often 2 

 ft. high, virgately paniculate: leaves cinereous-puberulent, linear or 

 spatulate-lanceolate, mostly entire, the upper ones beset with subsessile 

 glands : bracts of the involucre and subtending small leaves little or not 

 at all ciliate: achenes clavately obovate-oblong, with a keel or strong 

 nerve down the ventral face. — Foothills of the Sierra from Butte Co. to 

 Mariposa. June — Sept. 



5. L. serrata, Greene, Bull. Calif. Acad. i. 280 (1885). Stem 1—3 ft. 

 high, diffusely paniculate above, the herbage puberulent, not at all 

 glandular, except by a few minute stalked glands on the involucre: spat- 

 ulate-oblong leaves 1 — 3 in. long, with remote but distinct serratures: 

 heads showy, the rays % in. long. — Middle foothills of Nevada and El 

 Dorado counties. June — Sept. 



69. HOLOZONIA, Greene. Perennial, spreading by creeping root- 



