Peucedanum. OIBELLIFER^E. 2G7 



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

 Exp. 123, excl. var. 



Var. purpurascens, Gray. Involucres and iuvolucels 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 Pep. 15. 



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

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

 the vicinity of the Rocky Mountains. 



3. C. globosus, Watson. With the habit of the last, the segments of the leaves 

 somewhat broader ill outline : involucre and involucels apparently none, and the 

 rays anil pedicels obsolete, the flowers and fruit being in dense globose heads, I to 

 1 inch in diameter ; 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. 1-11. 



Northern Nevada ; near Carson City (Stretch, Watson) ; Goshoot Mountains, JBeckurith. Re- 

 ferred to by Dr. Torrey, in Pacif. R. Rep. ii. 120, under 0. montanus 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 rhizoma : 

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

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

 ulence : rays few, short or almost none ; involucre of numerous united somewhat 

 membranous long-acuminate segments : flowers purplish ; 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 (Brewer), at 9,000 to 10,00" feel 

 altitude. 



5. C. Nevadensis, Cray. Cespitose, leafy, roughish puberulent : leans 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, involucrate by several broad 3 — 5-eleft herbaceou 

 acute bracts: calyx-teeth lance-subulate; styles long; ovary obscurely winged.-— 

 PrOC. Am. Acad. vi. 53G. 



On the summit of Jit. Dana, at over 13,000 feet altitude, Bremer. Ripe fruit is wanting, and 

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



22. PEUCEDANUM, Linn. 



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 01 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, uol chan 



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



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



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



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



\ comprehensive genus of 1 no or more species, restricted in America to tile region west of the 

 Mississippi, whoro 20 species arc found. Thoj difTor in general habit from most •■! those of the 



Old World, but there seems no g 1 ground for n separation. The i""i^ of noil; nil, as in 



the last genus, are an Important article of feed among the Indiana 



