Peucedanum. TJMBELLIFER.E. 267 



the commissure: seed concave. — Torr, & Cray, Fl. i. G24 ; Watson, Bot. King 

 Exp. 123, excl. var. 



Var. purpurascens, Gray. Involucres and involucels very broad and conspic- 

 uous, nearly enclosing the flowers, obtuse, tinged or veined with purple and green : 

 fruit nearly sessile, large and very broadly winged. — Ives Colorado liep. 15. 



Olio of the earliest spring flowers in the Great Basin, from Western Nevada and Northern Ari- 

 zona to Utah ; doubtless in Eastern California. The tyincal form seems to be mostly confined to 

 the vicinity of the Rocky Mountains. 



3. C globosus, Watsf)n. Witli the habit of the last, the so^nionts of the loaves 

 somewhat broililer in c)utlino : involucre and involucels apparently none, and the 

 rays and pedicels obsoleto, the flowers and fruit being in dense globose heads, ^ to 

 1 inch in diamctcu' ; fruit 3 or 4 lines long, the thin flat wings a line broad, narrower 

 at base : oil-tubes solitary in the intervals, 2 on the commissure : seed slightly con- 

 cave on the face. — Proc. Am. Acad. xi. 141. 



Northern Nevada ; near Carson City {Stretch, Wnfjion) ; Goshoot Mountains, Bcckwith. Re- 

 ferred to by Dr. Toirey, in Pacif. R. Reji. ii. 120, under C. vwntamai as an abnormal form, and 

 made a variety of the same species in Bot. King Exp. 124, the true fruit not having been 

 examined. 



' +- -(- Dwarf and alpine. 



4. C. cinerarius, Gray. Acaulescent, with a subterranean creeping rhizoina : 

 scape (2 or 3 inches high) and petioles glabrous : leaves somewhat cordate in o\it- 

 line, bipinnate with toothed segments, glaucous-cinereous with a line rough puber- 

 ulence : rays few, short or almost none ; involucre of nuiMorous tiiiited somewhat 

 membranous long-acuminate segments : flowers ])urplish ; calyx-teeth small : fruit 

 3 lines long, the undulate wings less than a line broad ; oil-tubes 3 in the inter- 

 vals, several on the commissure : seed narrow, strongly curved with a deep central 

 channel. — Proc. Am. Acad. vi. 535. 



At Sonora Pass and above Mono Lake in the Sierra Nevada (Bremer), at 0,000 to 10,000 feet 

 altitude. 



5. C. NevadensiS, Gray. Cespitose, leafy, roughish pubcrulcMit : leaves rather 

 rigid, half an inch long, on short petioles, 3-lobed, the lobes 3 - 5-parted with lan- 

 ceolate-subulate segments : scape less than an inch high, terminated by an umbel of 

 3 to 5 nearly sessile umbellets, involncrato by several broad 3-5-cU'ft herbaceous 

 acute bracts: cnlyx-teeth lanco-suhulnte ; atyltvs h'lig; ovnry obHcuroly winged. — 

 Pro(!. Am. Acad. vi. 530. 



On the summit of Mt. Dana, at over 13,000 feet altitude, lirnirr. \\\\>(s fruit is wauling, and 

 the determination of the plant is therefore in some measure uncertain. 



22. PEUCEDANUM, Liun. 



Calyx-teeth obsolete or slightly prominent. Disk and stylopodium small and 

 depressed (in western species). Fruit suborbicular to oblong, strongly compressed 

 dorsally, the dorsal ribs filiform or slightly prominent, the lateral borders thin and 

 coherent till maturity ; oil-tubes solitary in the intervals, or in pairs, or in a few 

 species still more numerous. Seed flattened, scarcely concave on the face, not chan- 

 nelled under the oil-tubes. — Perennials, with fusiform or tuberous roots, caulescent 

 (usually shortly so) or acaulescent ; umbels without involucres (in western species), 

 mostly involucellato ; leaves pinnate to decompoundly dissected ; flowers yellow or 

 white. — Watson, Proc. Am. Acad. xi. 121. 



A comprohouflivo genus of 100 or more sppi'len, restricted in Amerii-a to the region west of the 

 Mississippi, wliero 20 species are found. They diifer in giiiernl habit from most of those of the 

 Old World, but there seems no good grounil for a scpiuMtinn. The roots of nearly nil, m in 

 the last genus, are an important article of food among the Indiiins. 



