CATALOGUE. 
129 
Var. ALPiNUxM. Dwarf ; leaves 3' long, with dilated scarious bases, 
mostly simply pinnate with 3-5 pairs of leaflets ; stems 4-G' high, with a 
3-6-rayed umbel, occasionally subtended 'by a single involucral bract; fruit 
2-3" long, the margins rather thin and the dorsal ribs either filiform or 
nearly as prominent as in an Angelica ; vittae very obscure, 1-2 in the inter- 
vals, 4-6 on the commissure. — East Humboldt Mountains, Nevaiha; 9,000 
feet altitude. (464.) 
Peucedanum simplex, Nutt. MSS., (in Herb. Gray.) Acaulescent, 
puberulent and glaucous ; leaves sheathing at base, pinnate or occasionally 
bipinnate, the leaflets about 2 pairs, linear or linear-lanceolate, elongated 
(2-4' long;) scapes 6-18' high, slender, exceeding the leaves, with very 
rarely a petioled leaf in the middle, bearing a single 5-15-rayed umbel; bracts 
of the involucel usually numerous, lanceolate or setaceous ; flowers yellow ; 
calyx-teeth obsolete ; fruit large, 3-6" long and 2-5" broad, somewhat emar- 
ginate at each extremity, the thin submembranous wing nearly as wide as 
the seed and with a vein-like margin ; the dorsal ribs slightly prominent ; 
vittse broad and solitary ; the seed thin and much flattened. — Identical with 
Nuttall's original specimens ; collected by him in the Rocky Mountains, also 
by Sitgreave in Northwestern Arizona, {P. triternatum, var. i^latycmyum, 
Torr,,) and found more recently in .Montana. Rather frequent on the foot- 
hills of the Wahsatch ; 5-6,000 feet altitude ; May-July. (465.) 
Peucedanum millefolium. Acaulescent, glabrous; leaves ternate- 
pinnately decompound, the ultimate segments linear, cuspidate, very numer- 
ous; scapes 12-18' high, with a single umbel of 6-12 fertile nearly equal 
rays, 1-3' long, the wholly sterile rays numerous and shorter ; involucre 
none; involucel of 8-12 linear-subulate bracts, not unilateral; calyx-teeth 
small; petals (apparently white) with a narrowly attenuated point; fruit 
large, 4-6" long and 3-4" broad, about equaling the raylets, somewhat cordate 
at base, the thin submembranous wing more than half as broad as tlie seed, 
the dorsal ribs slightly prominent ; vittse conspicuous and solitary, a central 
pair in the commissure with a more or less prominent mid-ril) l)elween; seed 
thin, somewhat concave. — Resembling P.fcEniculaccum, but taller, glabrous, 
the fruit 2-3 times larger, with fewer vitt?e. Antelope Island, Salt Lake ; in 
f'.uit, June. (466.) 
Peucedanum bicolor. Caulescent or scarcely so, glabrous or shghtly 
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