Hemhonia. COMPOSIT.E. 311 



stoiit rough awns, and as many intermediate short and lacerate-tnincate ones.— Proc. Am. 

 Acad. ix. 191, Bot. Calif. 1. c. Osuwrlmia tenella, Xutt. Trans. Am. Phil. Sor. vii. 392. 

 Calycadenia tenella, Torr. & Gray, Fl. ii. 402. — Pound only near Sau Diego, California; first 

 by Cmlter and Xuttall. 



* * Tack-shaped or .^aucer-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 slighlly pro- 

 tuberant terminal areola; no basal stipe: anthesis commonly (or perhaps always) \-espertine 

 or matutinal. 



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

 branches : flowers white or rose-tinged. 



H. pauoiflora, Gray, 1. c. A foot or less high, with spreading filiform branches, sparsely 

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

 the floral ones sparsely hispid near the l)a,se : ray-fluwers 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 

 paleae: ray-akenes glabrous: tack-shaped glands small and sparse, sliort-stalked. — Calyca- 

 denia paudflora, Bot. Jlex. Bound. 100. — California, from unrecorded station, Fremont. 

 Also Lakeport, Lake Co., Pringle. 



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

 ing branches : flowers yellow : plant remarkably glabrous. 



■ H. truncata, Gray, 1. t. A foot or two high: leaves rather lucid and thicki-sh, some of 

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

 sionally setose-cUiate, otherl^•ise 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 iuvolucral bracts and glabrous triangular-obpyramidal akenes: bracts of the 

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

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

 'paleic, much shorter than the akene, sometimes obsolete. — Cali/cadenia truncata, DC. 

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

 Oregon ; first coll. by Douglas. 



•i^ H^ 4— Heads 8-1.5-flowered, in axillary and terminal short-pedunculat« 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 pubemlent : 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 obpjTamidal, 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 smaU pointless 

 ones. — H. angustifilia, Durand, in Pacif. R. Rep. 1. c, not DC. Calycadenia 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 yeUow also, 

 by Lemmon, &c. 



^_ ^_ ^_ ^_ 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 sparsely and obscurely hispidulous-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-viUous, 

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

 or sometimes 12 narrow linear-lanceolate palea; 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.— Ca/ycarfewia villosa, DC. 1. c; Torr. & Gray, 1. c, founded on slender and too young 

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

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

 Parry. E. spicata, Greene, BuU. Torr. Club, ix. 16, a dwarf form, «-ith white flowers ; coU. 



