Hemizonia. COMPOSITE. 311 



stout rough awTis, and as many intermediate short and lacerate-truncate ones. — Proc. Am. 

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

 Caljcadenia tenella, Torr. & Gray, Fl. ii. 402. — Found only near San Diego, California; fir.st 

 by Coulter and Nuttall. 



* * Tack-shaped or saucer-shaped gland.s borne at least by the leaves next tlie heads and those fas- 

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

 5-toothed: ray-alvenes truncate at summit, and wiMi a depressed or sometimes slighilj' pro- 

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

 or matutinal. 



-1— Heads very fcw-doweved and nari'ow, spicatcdy and sparsely scattered along flcxuous simjde 

 branches: flowers white or rose-tini,'ed. 



H. pauciflora, Ukay, 1. c. A foot or less liigh, with spreading filiform branches, sparsely 

 liirsute, glabrate : heads solitary and sessile in the axils of small remote leaves ; these and 

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

 disk-flowers 3 in a .3-lobed cup ; their pappus of 5 subulate-awned and 5 small truncate 

 palea; : ray-akenes glabrous: tack-shaped glands small and sparse, short-stalked. — Caljca- 

 denia pauciflora, Bot. Mex. Bound. 100. — California, from unrecorded station, Fremont. 

 Also Lakeport, Lake Co., Pringle. 



-(— -t— Heads manj'-flowered, loosely paniculate or raeemosely scattered along the slender spread- 

 ing branches: flowers yellow: plant remarkably glabrous. 



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

 them liispidulous-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, witli ovate-oblong 

 boat-shaped involucral bracts and glabrous triangular-oljpyramidal akenes : bracts of the 

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

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

 paleae, much shorter than the akene, sometimes obsolete. — Cali/cadenia truncafa, DC. 

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

 Oregon ; first coll. by Douglas. 



-J— -)— -1— Heads 8-15-flowered, in axillary' and terminal shoi't-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 puberulent : 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 hack : 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 paleae nearly twice the length of the akenes, and one or two small pointless 

 ones. — //. angustifolia, Durand, in Pacif. M. Rep. 1. c, not DC. Calt/cadenia 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 Lcinmon, &c. 



-,- ^_ ^_- .)— Heads scveral-many-flowered, mostly glomerate or spicatcly paniculate on the 

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

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

 disk-corollas sometimes strongly and sometimes sparsely and obscurely iiispidulous-glandular or 

 barbellate on the outside. 

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

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

 involucre and receptacle : flowers yellow or wliite and ])urplish-tingcd : akenes silky-villous, 

 at lea.st when young, but often glabrate: pa])i)us a little shorter than the disk-corolla, of 10 

 or sometimes 12 narrow linear-lanceolate i)ale;c wliich are gradually attenuate into an awn- 

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

 less. — Califcndenia villosa, DC. 1. c. ; Torr. & Gray, 1. c, founded on slender and too young 

 specimens of coll. Douglas. //. 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 

 Parr I/. H. spicata, Greene, Bull. Torr. Club, ix. 16, a dwarf form, with white flowers ; coll. 



