Hemizonia. COMPOSITE. 311 



stout rough awns, ami as many intermediate short and lacerate-truncate ones. Proc. Am. 

 Acad. ix. 191, Bot. Calif. 1. c. Osmadenia tenella, Nutt. Trans. Am. Phil. Soc. vii. 392. 

 Cali/cadem'a tenella, Torr. & Gray, Fl. ii. 402. Found only near San Diego, California; first 

 by Coulter and Nv.Hnll. 



* * Tack-shaped or saucer-shaped glands borne at least by the leaves next the heads and those fas- 

 cicled in the axils: stem strict or with ascending branches: disk-corollas long and narrow, 

 5-toothed: ray-akenes truncate at summit, and with a depressed or sometimes slightly pro- 

 tuberant terminal areola; no basal stipe: authesis commonly (or perhaps always) vespertine 

 or matutinal. 



-I Heads very few-flowered and narrow, spicately and sparsely scattered along flexuous simple 

 branches: flowers white or rose-tinged. 



H. pauciflora, GRAY, 1. c. A foot or less high, with spreading filiform branches, sparsely 

 hirsute, glahrate : heads solitary and sessile in the axils of small remote leaves ; these and 

 the floral ones sparsely hispid near the base : ray-flowers solitary or 2, the ligule 3-parted: 

 disk-flowers 3 iu a 3-lohed cup; their pappus of 5 subulate-awned and 5 small truncate 

 pale: ray-akenes glabrous: tack-shaped glands small and sparse, short-stalked. Cali/ca- 

 denia pane! flora, Bot. Mex. Bound. 100. California, from unrecorded station, Fremont. 

 Also Lakeport, Lake Co., Pringle. 



-t -t Heads many-flowered, loosely paniculate or racemosely scattered along the slender spread- 

 ing branches : flowers yellow: plant remarkably glabrous. 



H. truncata, GRAY, 1. c. A foot or two high : leaves rather lucid and thickish, some of 

 them hispidulous-scabrous, or the lower with a few bristles, and those next the heads occa- 

 sionally setose-ciliate, otherwise very smooth : glands mostly only terminal, large and sub- 

 sessile : heads oval-campanulate, 4 or 5 lines long : ray-flowers 5 to 8, with ovate-oblong 

 boat-shaped involucral bracts and glabrous triaugular-obpyramidal akenes : bracts of the 

 receptacle 7 to 9, lightly connate to the top into a truncate cup, at length separable : disk- 

 flowers 10 to 20; their pappus of 7 to 10 oblong and somewhat erose fiinbriate pointless 

 palese, much shorter than the akene, sometimes obsolete. Cali/cadcnia truncata, DC. 

 Prodr. 1. c. ; Torr. & Gray, 1. c. California, from near San Francisco Bay northward into 

 Oregon ; first coll. by Dmn/las. 



* -) -t Heads 8-15-nV.vered, in axillary and terminal short-pedunculate clusters on the strict 

 stem or branches: pubescence all soft and short, grayish. 



H. mollis, GRAY, 1. c. A foot or two high, the stem only puherulent : leaves cinereous- 

 pubescent ; those of the fascicles and around the heads and the bracts tipped with a short- 

 stalked dark gland, also some on the back : ray-flowers 3 to 5, with sometimes white some- 

 times yellow 3-parted ligules on a short slender tube : chaff of receptacle forming a 6-8- 

 toothed cup: ray-akenes obpyramidal, glabrous : disk-flowers 5 to 10, with pappus of 5 or 6 

 subulate-awned palece nearly twice the length of the akenes, and one or two small pointless 

 ones. H. angustifolia, Durand, in Pacif. R. Rep. 1. c., not DC. L'tilf/<'<nlenia mollis, Gray, 

 Proc. Am. Acad. vii. 360. Sierra Nevada, California, in the foothills up to 4,000 feet in 

 Merced Co. and Tuolumne Co.; first found with bright white rays, later with yellow also, 

 by Lemmon, &c. 



-i -i H H Heads several-many-flowered, mostly glomerate or spicately paniculate on the 

 strict stem or branches, in depauperate slender plants solitary in the axils: leaves rather rigid: 

 pubescence setose-hirsute or hispid, at least on the margins of the upper leaves: lobes of the 

 disk-corollas sometimes strongly and sometimes sparselv and obscurely liispidulous-glandular or 

 barbellate on the outside. 



H. Douglasii, GRAY, 1. c., partly. Whitish-hirsute and hispid : tack-shaped glands not rare 

 on the margins as well as the tips of many of the leaves, mostly none on the bracts of the 

 involucre and receptacle : flowers yellow or white and purplish-tinged: akenes silky-villous, 

 at least when young, but often glabrate : pappus a little shorter than the disk-corolla, of 10 

 or sometimes 12 narrow linear-lanceolate palca? which are gradually attenuate into an awn- 

 like point, as long as or longer than the akenes, or 2 or 3 of them not rarely shorter or point- 

 less. Cali/cadenia villosa, DC. 1. c. ; Torr. & Gray, 1. c., founded on slender and too young 

 specimens of coll. Douglas. H. hispida, Greene, Bull. Torr. Club, ix. 63 ; a robust form, 

 1 to 3 feet high, with yellow flowers ; coll. near Atwater Station, Merced Co., by Greene and 

 Parry. H. spicata, Greene, Bull. Torr. Clu':>, ix. 16, a dwarf form, with white flowers; coll. 



