364 UMBELLIFERAE (PARSNIP FAMILY) 



6. Cogswellia foeniculacea (Nutt.) C. & R. 1. c. 449. Acaulescent, at 

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

 finely dissected, ternate 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 2-4 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 Assipiboia 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 

 Territory. 



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

 puberulent, often tall and stout: leaves ternate or biternate; 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, with wings broader than body (also extending below body), 

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

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

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

 ington. 



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

 nearly acaulescent, 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 ternate) 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 unilateral; rays 2-10 cm. long; pedicels 2-10 mm. long; flowers white: 

 calyx-teeth evident: fruit linear-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 2-3), 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. Acaulescent or shortly caules- 

 cent, with short and soft pubescence: peduncles 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 1-3.5 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 nudi- 

 caule. On the plains and foothills; N. Dakota to Kansas and far westward. 



27. CYNOMARATHRUM Nutt. 



Acaulescent 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 flowers. Calyx-teeth evident. Fruit 

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



