364 UMBELLIFERAE (PARSNIP FAMILY) 



6. Cogswellia foeniculacea (Nuct.) C. & R. 1. c. 449. Acaulesoent, at 

 first densely villous but becoming more or less glabrate, 1-3 dm. high: leaves 

 finely dissected, temate then pinnately decompound, with very numerous 

 narrow crowded segments: umbel somewhat equally 5-15-rayed, with in- 

 volucels of conspicuous, lanceolate, more or less united and usually very to- 

 mentose bractlets; rays 2^ cm. long; pedicels 2-6 mm. long; flowers yellow, 

 the ovaries densely pubescent: fruit orbicular to oblong, somewhat pubescent, 

 5-8 mm. long, 4-5 mm. broad, with wings half as broad as body; oil-tubes 3 

 or 4 in the intervals, 4 on the commissural side: seed face plane. — ^From the 

 plains of Assiniboia to Texas. 



7. Cogswellia Jonesii (C. & R.) Jones 1. c. 34. Resembling C. foeniculacea, 

 but lower, more inclined to branch at base, at least the foliage persistently vil- 

 lous: leaves smaller, with more crowded segments: involucels of less conspic- 

 uous linear, usually distinct and villous bractlets; rays 1-3 cm. long; pedicels 

 3-12 mm. long; flowers yellow or tinged with purple: fruit elliptical or broadly 

 oblong, pubescent, 8 mm. long, 6-7 mm. broad, with broader wings (more 

 than half as broad as body). — ^From Utah and Wyoming to the Northwest 

 Terriiory. 



8. Cogswellia platycarpa (Torr.) Jones 1. c. 32. Caulescent or acaulesoent, 

 puberulent, often tall and stout: leaves temate or bitemate; leaflets very 

 narrowly linear (almost filiform) to linear-lanceolate, 5-10 cm. long: umbel 

 unequally 3-15-rayed, with involucels of lanceolate or setaceous bractlets; 

 rays 1-7.5 cm. long; pedicels 2-6 mm. long; flowers yellow: fruit broadly ob- 

 long to nearly orbicular, sometimes emarginate at each end, 6-12 mm. long; 

 4-10 mm. broad, vrith wings broader than body (also extending below bodjO, 

 and prominent dorsal and intermediate ribs; oil-tubes large and solitary in 

 the intervals, 2 on the commissural side: seed face slightly concave. Peuce- 

 datium simplex. — In the western part of our range to Montana and Wash- 

 ington. 



9. Cogswellia macrocarpa (Nutt.) Jones 1. o. 33. Somewhat caulescent or 

 nearly acaulesoent, 1-6 dm. high, more or less pubescent, much branched at 

 base, from a more or less elongated thick root: leaves pinnately (or first di- 

 vision temate) compound; segments pinnately incised, ultimate divisions 

 ovate or short-linear: umbel somewhat equally 3-10-rayed, with involucels 

 of conspicuous, somewhat f oliaceous, lanceolate or linear bractlets often united 

 and itoilateral; rays 2-10 cm. long; pedicels 2-10 mm. long; flowers white: 

 calyx-teeth evident: fruit Unear-oblong to broadly oblong, elliptical or ovate, 

 glabrous, 6-20 mm. long, 3-7 mm. broad, with wings from very narrow to as 

 broad as body, and filiform dorsal and intermediate ribs; oil-tubes solitary 

 in the intervals (often obscure, rarely 3-3), 2 or 4 on the commissural side: 

 seed face with a slight central longitudinal ridge. — ^Throughout the western 

 part of our range and west to the Pacific States. 



10. Cogswellia orientalis Jones 1. c. 33. Acaulesoent or shortly caules- 

 cent, with short and soft pubescence: pedimcles 1-3 cm. high, and a thick 

 elongated root (often swollen in places): leaves bipinnate, the small oblong 

 segments entire or toothed: umbel unequally 5-8-rayed, with involucels of 

 scarious-margined (of ten purplish) lanceolate, distinct bractlets; rays l-3i5 cm. 

 long; pedicels glabrous, 5-7 mm. long; flowers white or pinkish, with glabrous 

 ovaries: fruit almost round, emarginate at base, glabrous, 5 mm. long, 4 mm. 

 broad, with wings not as broad as body, and indistinct or obsolete dorsal and 

 intermediate ribs; oil-tubes solitary in the intervals (rarely 2 in the lateral 

 intervals), 4 on the commissural side: seed face plane. Peucedanum v/udi- 

 caide.^-^^Q the plains and foothills; N. Dakota to Kansas and far westward. 



27. CYWOMARATHRUM Nutt. 



Acaulesoent plants or nearly so, from a stout caudex becoming multicipital 

 and densely clothed with old leaf-sheaths, with leaves narrow in outline (the 

 first division pinnate), and yellow flotver3._ Calyx-teeth evident. Fruit 

 strongly flattened dorsally, oblong. Carpel with sharp or winged dorsal and 



