172 AMMIACEAE 



Wings of the fruit less than half as wide as the body; bractlets linear. dis- 

 tinct. 17. C. M.acDougalii. 

 Bractlets of the involucels none or very few, linear or subulate. 

 Leaves finely dissected, with numerous small divisions. 

 Fruit oval in outline. 



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; fruii puberulent. 



21. C. Sandbergii. 

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



22. C. juniperina. 

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



sUghtly puberulent. 7. C. bicolor. 



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

 divisions; flowers yellow. 

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



Fruit puberulent; leaf-segments many; peduncles not t^ckened. 



27. C. anomala. 

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

 the apex. 

 Fruit eUiptic; 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. 



33. LEPTOTAENIA Nutt. Wild Parsnip. 



Flowers yellow or salmon-colored. 



Foliage puberulent; dorsal ribs faint; flowers yeUow. 



Fruit sessile or nearly so; staminate flowers with long pedicels. 1. L. foHosa. 

 Fruit with pedicels longer than those of the staminate flowers. 



Fruit 8-12 mm. long, usually without oil-tubes; leaves finely dissected into 



Unear divisions. 2. L. mullifida. 



Fruit 14-18 mm. long, with oil-tubes; leaves less dissected into oblong divisions. 



3. L. Baloni. 

 Foliage glabrous ; dorsal ribs strong. 



Fruit broadly oblong, 5-6 mm. broad. 4. L. salmoniflora. 



Fruit narrowly oblong, 4 mm. broad. 5. L. filicina. 



Flowers purple. 6. L. purpurea. 



34. CYNOMARATHRUM (Nutt.) Coult. & Rose. 

 Leaves glabrous. 



Leaves bipinnate. 



Leaf-segments linear. 



Pedicels in fruit 1-6 mm. long. 



Divisions of the leaves elongate-linear, 1-5 cm. long; bractlets 5-10 mm. 



long. 1. C. Nuttallii. 



Divisions of the leaves less than 1 cm. long; bractlets 3-4 mm. long. 



2. C. megarrhizum. 

 Pedicels in fruit 8-16 mm. long; divisions of the leaves short, u.sually less than 

 5 mm. long. 3. C. Parryi. 



Leaf-segments lanceolate. 4. C. latilobum. 



Leaves bitemate. 5. C. brecciarum. 



Leaves .scabrous. 



Pedicels 12-18 mm. long; wings of the fruit about as broad as the body. 



0. C. Eastwoodae. 

 Pedicels 2-6 mm. long ; wings of the fruit half as broad as the body. 



7. C. scabrum. 



35. ANGELICA L. A^fGELICA. 



Oil-tubes mostly solitary in the intervals, not continuous around the seed; rays of the 

 umbels ascending. 

 Involucre and involucels of several follaceous, lacerately toothed bracts. 



1. A. Dawsoni. 

 Involucre none or consisting of 1-2 small bracts. 

 Involucels of many bractlets. 



Bractlets lanceolate, acuminate. 2. A. Grayi. 



Bractlets linear-filiform. 3. A. genuiflexa. 



