(>5 



21. P. Donnellii C. tV K. Hot. (i;i/.cttc, xiii. 1 t:{. S imtlv 

 caulescent or acaiilesccnt, () to J 2 inches high, glabrous, from a 

 fusiform root: leaves ternate then pinnately decompouiul, with 

 segments pinnately cleft into short oblong or linear lobes: umbel 

 somewhat unequally (') to 12-raye(l, with involr.cels of linear 

 acuminate bractlets; rays 1 to + inches long; pedicels 2 to 8 lines 

 long: fruit ovate to broadly oblong, glabrous, 8^ to 4 lines long, 

 2 to 3 lines broad, with wings less than half as broad as body, and 

 prominent dorsal an.l intermediate ribs: oil-tubes small, 4 to i:i the 

 intervals, 4 to 6 on the commissural side. (Fig, o7).) 



Oregon, Union county (C««/(/c :>i;. in iss.i), Jolm Day \u.\[ny < Hmre 1 1 

 42(1 and 829, in 1885). Fl. April. 



Most nearly resembling F. XerddeiiMc. Dedicated to John Donnell 

 Smith, in whose herbarium the .species was first detected. 



22. P. Sandbergii C. &. R. Bot. Gazette, xiii. 71>. Caules- 

 cent, branching at base, an inch or two to a foot high, from an 

 elongated comparatively slender root, rough puberulent: petioles 

 wholly inflated, with a very conspicuous white scarious margin; 

 leaves ternately or pinnately dissected, the ultimate segments very 

 short linear: umbel very uneciuallv () to 15-rayed, with involucels 

 of distinct linear-lanceolate bractlets; rays 1 to 4 inches long; 

 pedicels a line or tv/o long; flowers bright yellow: fruit ovate, 

 puberulent, 2 to 2^4 ''"^s long, 1^4 lines Inroad, with very narrow 

 wings, and filiform dorsal and intermerliate ribs: oil-tubes 4 or T) in 

 the intervals, () on the commissural fide: seed-face phuie. (Fig. 7)().) 



Bare mountain tops, ">.0()(i feet altitude, along snow drifts. Kootenai 

 county, N. Idaho (J. H. Samlbtrif 47); Upper Marias Pass, 7,300 feet 

 altitude, N. Montana {('anhj; ir>0>; North and Soutli Kootonai Pass ( />/»»•- 

 Koii S7()) and top of Crow's Nest Pass (Duunon !)2i, B. C. 



This very distinct alpino species is remarkable for ith inllated petioles, 

 with very broad glistening s( arious margins, which form the most con- 

 spicuous feature of the plant. The pe<luncles are short when the plant lirst 

 blooms, rising but a few inches above the ground, but they rapidly elong- 

 ate, becoming as much as a fo(jt l.igh. The fertile rays also are often 

 very much elongated. Ix^cDming manv (ini<'s longer than tln> sterile rays. 



28. P. microcarpum Howell i-i beib. Closely resembling 

 the precetling species, but diffeiing in its stouter habit, petioles 

 without conspicuous margins, somewhat equally-rayed umbels, 

 deeper yellow flowers, glabrous fruit which is oblong and 8 lines 



