Peucedanum. TJMBELLIFEILE. 267 



the commissure : seed concave. * Torr. & Gray, Fl. i. 624 ; 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 Rep. 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 in outline : involucre and involucels apparently none, and the 

 rays and pedicels obsolete, the flowers and fruit being in dense globose heads, J 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. 141. 



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

 ferred to by Dr. Torrey, in Pacif. R. Rep. ii. 120, under C. 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. 



-f- -t- 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 tine 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 10,000 feet 

 altitude. 



5. C. Nevadensis, Gray. Cespitose, leafy, roughish puberulent : 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, involucrate by several broad 3 - 5-cleft herbaceous 

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

 Proc. Am. Acad. vi. 536. 



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

 the determination of the plant is therefore in 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 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 involucellate ; leaves pinnate to decompoundly dissected ; flowers yellow or 

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



A comprehensive genus of 100 or more species, restricted in America to the region west of the 

 Mississippi, where 20 species are found. They differ in general habit from most of those of the 

 Old World, but there seems no good ground for a separation. The roots of nearly all, as iu 

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



