CARROT FAMILY 625 



Plant glabrous throughout. 



Divisions of the leaves filiform. 18. C. Grayi. 



Divisions of the leaves oblong or broadly linear. 



Flowers white; dorsal ribs of the fruit somewhat wing-margined. 



19. C. lapidosa. 

 Flowers yellow; dorsal ribs of the fruit not wing-margined. 



20. C. Donnellii. 

 Plant puberulent. 



Leaf-sheath with broad white scarious margins; fruij; puberulent 



21. C. Sandbergii. 

 Leaf-sheath not broadly scarious-margined; fruit glabrous. 



22. C. juniperina. 

 Fruit oblong-linear in outline; leaves finely dissected into filiform divisions, 



slightly puberulent. 7. C. bicolor. 



Leaves simply or doubly (rarely 3 or 4 times) ternate, with comparatively large 



divisions; flowers yellow. 



Leaf-divisions linear or narrowly linear-lanceolate, mostly attenuate. 

 Wings of the fruit as broad as the body or broader. 



Fruit glabrous; leaflets usually linear-lanceolate. 23. C. simplex. 

 Fruit puberulent; leaflets usually narrowly linear. 24. C. leptophylla. 

 Wings of the fruit narrower than the body. 



Ovary and fruit glabrous. 25. C. triternata. 



Ovary and young fruit puberulent. 26. C. robustior. 



Leaf-divisions from linear-oblong to oval, obtuse or acutish. 



Fruit puberulent; leaf-segments many; peduncles not thickened. 



27. C. anomala. 

 Fruit glabrous; leaf-segments few; peduncles in fruit usually inflated at 



the apex. 

 Fruit elliptic; oil-tubes solitary in the intervals; leaflets at least twice 



as long as broad. 28. C. nudicaulis. 



Fruit oval; oil-tubes several in each interval; leaflets usually not twice 



as long as broad. 29. C. platyphylla. 



1. C. Gormani (Howell) M. E. Jones. Corm small; leaves bipinnate, with 

 the ultimate segments linear or oblong; bractlets few, setaceous, or none; fruit 

 sessile or nearly so, rough puberulent, ovate, 6 mm. long; wings more than half 

 as broad as the body. Peucedanum Gormani Howell. P. confusum Piper. 

 Mountains: Ore. Ida. Wash. Ap-My. 



2. C. Canbyi (Coult. & Rose) M. E. Jones. Corm 1-2.5 cm. thick; scape 

 7-20 cm. high; leaves ternate, then pinnatifid; bractlets narrowly linear ; scarious- 

 margined; fruit ovate-oval, glabrous, 8 mm. long, 5 mm. broad; wings about 

 half as broad as the body. P. Canbyi Coult. & Rose. Stony ground: Ore. 

 Ida. Wash. Son. Submont. Ap-My. 



3. C. Geyeri (S. Wats.) M. E. Jones. Corm small, globular; scape 1-4 dm. 

 high; leaves once or twice ternate, then pinnate; segments linear, 1-5 cm. long; 

 bractlets numerous, purplish, lanceolate, acuminate, united; fruit oval, 8-10 

 mm. long, 5 mm. broad; wings membranous. P. Geyeri S. Wats. Sandy or 

 gravelly ground: Wash. Ida. B.C. Son. My-Je. 



4. C. farinosa (Hook.) M. E. Jones. Corm globose or sometimes several 

 corms in succession; stem scapiform or few-leaved, 2-3 dm. high; leaves ternate 

 or biternate; leaflets 1-8 cm. long; bractlets several, linear, acuminate; fruit 

 linear-oblong, glabrous, 6-8 mm. long, 2-3 mm. wide. P. farinosum Hook. 

 Rocky places: Ore. Ida. B.C. Submont. Ap-My. 



5. C. ambigua (Nutt.) M. E. Jones. Corm sometimes globose, sometimes 

 fusiform, occasionally with several successive thickenings; sheaths very con- 

 spicuous; leaf -blades once or twice ternate, with elongate linear or linear-fili- 

 form leaflets; bractlets none; pedicels 4-8 mm. long; fruit narrowly oblong, 6-8 

 mm. long, 2 mm. wide, very narrowly winged. P. ambiguum Nutt. Sandy or 

 gravelly hillsides or valleys: B.C. Mont. Wyo. Utah Ore. Son. Sub- 

 mont. My-Au. 



6. C. leptocarpa (Nutt.) M. E. Jones. Corm globose; plant subacaules- 

 cent; scape 2-3 dm. high; leaves ternate, then once or twice pinnate, with elon- 

 gate linear divisions; bractlets small, linear-subulate; fruit nearly sessile, 9-10 

 mm. long, 2 mm. broad, with very narrow wings. P. leptocarpum Nutt. P. 

 bicolor gumbonis M. E. Jones. Stony hillsides and plains: Ore. Ida. Colo. 

 Calif. Plain Submont. My-Je. 



24 



