310 COMPOSITJE. Semizonia. 



Prodr. 1. u. — Dry ground, W. California, common from Monterey to San Diego ; first coll. 

 ty Coulter, Douglas, &c. Passes into 



Var. ramosissima. Diffuse, sometimes decumbent : upper leaves mostly entire : 

 heads less fascicled or all scattered: akcnes at maturity rugose. — H. ramosissima, Tienih. 

 Bot. Sulpli. 30; Gray, Bot. Mex. Bound. 100, & Bot. Calif, i. 362. — Same range, and to 

 San Bernardino Co. 



Var. Lobbii {H. Lobbii, Greene, Bull. Torr. Club, ix. 109, founded on a single speci- 

 men, coll. by Lobb, tliought to come from near Monterey) appears to be nothing more than 

 a tall and slender form of this species, with stem 2 feet high, long and slender branches, 

 very small aud numerous leaves on the branchlets, rays reduced to 3 or 4, and disk-flowers 

 to about the same number, each subtended and partly enclosed by a free bract. But speci- 

 mens hardly sufficient. 



* * * Receptacle flat: all the flowers subtended and akenes partly enclosed by bracts; the 

 corolla-tubes glandular: ligules yellow and broad, 5 to 8: ray-akenes somewhat 5-nerved or 

 angled, i. e. ventral face somewhat carinate-angled, with short upturned beak: disk-flowers 8 to 

 15, with akenes mostly sterile and destitute of pappus : slender virgately branched or panicu- 

 late annuals, with lowest cauline leaves commonly laciniate-dentate, the upper all small and 

 linear, none of them at all pungently pointed, but those of the branchlets tipped with a sessile 

 truncate gland. 



H. Heermanni, Greene. Viscid and somewhat pubescent or hirsute, heavy-scented, 

 paniculately branched, 1 to 3 feet high, the minute leaves of the diffuse flowering branchlets 

 rather scattered : involucre nearly hemispherical ; its bracts (and rays) 5 to 9, viscid-pubes- 

 cent and copiously beset with pedicellate glands ; the terminal gland inconspicuous : beak 

 and stipe of ray-akenes somewhat conspicuous: disk-flowers 10 to 15. — Bull. Torr. Club, 

 ix. 15. H. macradenia, Durand, Pacif. R. Rep. v. 10, not DC. H. ramosissima, in part, 

 Rothrock in Wheeler Rep. vi. 365. — Southern part of California, from Santa Barbara to 

 Kern Co., &c. , first coll. by Ileermann. 



H. virgata, Gkay. Less pubescent and viscid or nearly glabrous, the stem or long branches 

 virgate and bearing numerous racemosely or somewhat paniculately disposed heads on short 

 densely foliolose branchlets ; their leaves Heath-like, line long, all glandular-truncate : invo- 

 lucre campanulate or in age oblong ; its mostly 5 bracts becoming coriaceous, with stout 

 involute tip bearing a large truncate gland, the back nearly glabrous and sparsely beset with 

 some stout pedicellate glands or gland-tipped processes : stipe of ray-akene hardly any, and 

 its beak short: disk-flowers 7 to 10. — Bot. Mex. Bound. 100, & Bot. Calif, i. 363. — Cali- 

 fornia, from Lake Co. to Los Angeles, &c. ; first coU. by Fremont. 



§ 3. Caltcadenia, Gray, 1. c. Ray-flowers few (1 to 7), with very broad 

 palmately 3-lobed or parted ligule ; their akenes mostly dull, obovoid-triangular 

 and little oblique ; the terminal areola scarcely if at all eccentric : disk-flowers 

 surrounded by a circle of herbaceous bracts (forming a kind of inner involucre), 

 which are connate into a cup or rarely separable ; their akenes well formed and 

 the outer not rarely fertile (then hairy), turbinate-quadrangular or slightly ob- 

 compressed, straight, bearing a conspicuous paleaceous pappus: annuals, "with 

 entire narrowly linear leaves, often becoming filiform by revolution of the mar- 

 gins ; those of the axillary fascicles and clusters near the heads usually tipped 

 with tack-shaped or when dry saucer-shaped conspicuous glands, whicli are either 

 sessde or short-stipitate, sometimes similar glands along their backs or edcfes : 

 heads as it were involuorate by some bract-like leawH.—Cah/cadenia, DC. 

 Prodr. V. 695. 



# Wholly destitute of tack-shaped glands, paniculately and diffusely much branched and heads 

 scattered; rays 3-parted down to the slender tube, and disk-corollas cleft into oblong-linear 

 lobes; both white: ray-akenes almo.st beaked. —OsmnA'7<;((, Nutt. 



H. tenella, Gray, slender, 6 to 18 inrlies high, sparsely hirsute-pubescent or hisj.id, and 

 filiform branchlets minutely viscid-glandular: leiives almost filiform: involucre oylindra- 

 ceous-camjiaimlate : ray-flowers 3 to 5 ; their akenes rugose, short-stipitate and abruptly 

 rostellate-a])iculate : disk-flowers 5 ; their pappus of 4 or 5 lanceolate palere tapering into 



