66 



On cliffs, Rosoburg, Uiiii>(|ua Valley, Oregon, April 20, 1S87 (IJoutll 

 700). 



J; 4. Shortly caulescent, slender, from elongated comparatively slen- 

 der roots, glabrous (except P. Vaseui): 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. Hallii). 



* Frnit-zvitios ha/fas broad os body. 



24. P. Hallii Watson, Proc. Am. Acad. xi. 141. The elon- 

 gated peduncles 6 to 15 inches high: leaves pinnate, oblong in out- 

 hne, the ovate segments half inch long, deeply toothed or pinna- 

 tifid: imibel equally 3 to6-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 filiform 

 dorsal and intermediate ribs: oil-tubes 3 in the intervals, 4 to 6 on 

 the commissural side. (Fig. 57.) — P. iiudicaide Gray, Proc. Am. 

 Acad. viii. 385. 



Oregon, "northern part" (Hall 211). above snow line on Mt. Hood (Mrn. 

 P. Cr. Barrett, in 18f<2); "Washington Territory, Mt. St Helens 1 3/r-s. Brirnfs, 

 in 1S85). 



25. P. Austinae C. <S: R. Dot. Gazette, xiii. 208. Resemb- 

 ling the preceding species, but with leaf-segments larger and pin- 

 nate with nai'row often tooflicd (li\ isions, flowers piu-plish, fruit 

 3"j lines long. I ' _, lines Inoad, with oil-tubes soiitarx in the dor- 

 sal intervals, mostly 2 in tlie lateral, 1 on the con)inissur;il 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 7.32). Distributed as P. Hallii. 



* * Fri(it-%vi}igs ))iiich broader t/ia?i 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, 3i/^ 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. 50.) 



Rocky places, Oregon, Cascade Mts. and Waldo (Howell, in 1880), Fl. 

 May. 



