172 AMMIACEAE^ 



Wings of the fruit less thian half as wide as the body: bractlets Uu ear. dis- 

 tinct. 17. C. MacDougalii. 

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

 Leaves finely dissected, with numerous small divisions. 

 Fruit oval in outline. 



Plant glabrous tliroughout. 



Divisions of the leaves filiform. IS. 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-marguied. 



20. C. Donnellii. 

 Plant puberulent. 



Leaf-sheath with broad white scarious margins; fruit puberulent. 



21. C. Sandbergii. 

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



22. C juniperina. 

 Fruit oblong-Unear 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 puberiflent. 26. C. robustior. 



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



Fruit puberulent; leaf-segments many; pedimcles not tiiickened. 



27. C. anomala. 

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

 the apex. 

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



as long as broad. 2S. C. nudicauUs. 



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 yeUow or salmon-colored. 



Foliage jjuberulent: dorsal ribs faint; flowers yellow. 



Fruit sessile or nearly so: staminate flowers with long pedicels. 1. L. foliosa. 

 Fruit with pedicels longer than those of the staminate flowers. 



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



linear divisions. 2. L. mulliflda. 



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



3. L. Ealoni. 

 Foliage glabrous: dorsal ribs strong. 



Fruit broadly oblong, o-tt mm. broad. 4. L. salmoniflora. 



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



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, usually less than 

 5 mm. long. 3. C. Parryi. 



Leaf-segments lanceolate. 4. C. latilobum. 



Leaves biternate. 5. C. brccciarum. 



Leaves scabrous. 



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



6. C. Eastwoodae. 

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



7. C. scabrum. 



35. ANGELICA L. Angelica. 



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

 umbels ascending. 

 Involucre and involucels of several foUaceous, laceratelj toothed bracts. 



1. ,4. Dawsoni. 

 Involucre none or consisting of 1-2 small Ijracts. 

 Involucels of many bractlets. 



Bractlets lanceolate, acuminate. 2. A. Grayi. 



Bractlets linear-filiform. 3. A. genuiflexa. 



