66 
Oil cliffs, Eoseburg, Umpqua Valley, Oregon, April 20, 1887 {Howell 
709). 
§ 4. Shortly caulescent, slender, from elongated comparatively slen- 
der roots, glabrous (except P. Vaseyi): leaves small, lanceolate or oblong 
in outline, pinnate or bi pinnate, with ovate toothed segments: fruit- wings 
half as broad as body or much broader: oil-tubes solitary in the intervals 
(except P. HalUi). 
* Fruit-wings half as broad as body. 
24. P. Hallii Watson, Proc. Am. Acad. xi. 141. The elon- 
gated peduncles 6 to 15 inches high: leaves pinnate, oblong in out- 
line, the ovate segments half inch long, deeply toothed or pinna- 
tifid: umbel equally 3 to 6-rayed, with small involucels; rays about 
an inch long; pedicels 3 or 4 lines long; flowers yellow: fruit 
broadly elliptical, glabrous, 3 lines long, 2 lines broad, with Aliform 
dorsal and intermediate ribs: oil-tubes 3 in the intervals, 4 to 6 on 
the commissural side. (Fig. 57.) — P. nudicaule Gray, Proc. Am. 
Acad. viii. 385. 
Oregon, “northern part” {Hall 211), above snow line on Mt. Hood {Mrs. 
P. G. Barrett, in 1882); Washington Territory, Mt. St Helens (Mrs. Briggs, 
in 1885). 
25. P. Austinae C. & R. Bot. Gazette, xiii. 208. Resemb- 
ling the preceding species, but with leaf-segments larger and pin- 
nate with narrow often toothed divisions, flowers purplish, fruit 
3i^ lines long, lines broad, with oil-tubes solitary in the dor- 
sal intervals, mostly 2 in the lateral, 4 on the commissural side, 
and an additional one in each group of strengthening cells; 
seed-face concave, with central longitudinal ridge. (Fig. 58.) 
California, Plumas county {Mrs. R. M. Austin, in 1880), Humboldt 
county {Greene 732). Distributed as P. Hallii. 
* * Fruit-wings 7nuch broader than body. 
26. P. Martindalei C. & R. Bot. Gazette, xiii. 142. Re- 
sembling P. Hallii in habit and foliage, but differing in leaves 
sometimes bipinnate, with toothed or pinnatifid segments, fruit 4 
to 7 lines long, 3^ lines broad, with wings much broader than 
body (which is but a line), and prominent dorsal and intermediate 
ribs; oil-tubes solitary in the intervals, 2 on the commissural side; 
seed-face somewhat concave, with central longitudinal ridge. 
(Fig. 59.) 
Koeky places, Oregon, Cascade Mts. and Waldo {Howell, in 1880), FI. 
May. 
