-8 3 - 



30a. Principal branches of the umbel 2 5; fruit linear-oblong; 

 woodland plants blooming in spring (2 4 dm. high) 



Chervil, Chaerophylluni procumbens. 



30b. Principal branches of the umbel 7 or more; fruit ovate to 

 broadly elliptical (summer) 31. 



31a. Native plants, growing in swamps (515 dm. high) 



Hemlock Parsley, Conioselimim chinense. 



31b. Introduced plants, in waste places and along roads 32. 



32a. Stems conspicuously spotted with purple (5 15 dm. high) 



Poison Hemlock, Conium maculatum. 

 32b. Stems not spotted with purple (2 5 dm. high) 



Caraway, Carum carvi. 



CORNACEAE, the Dogwood Family 



Trees, shrubs, or herbs, with alternate leaves and small flowers 

 in rather crowded rounded or flattened clusters; sepals 4, minute; 

 petals and stamens each 4; ovary inferior, ripening into a berry. In 

 one genus the flowers are minute and greenish, with 5 sepals and 

 petals minute or none. 



la. Leaves alternate 2. 

 Ib. Leaves opposite 3. 



2a. Flowers white, conspicuous, in flattened clusters (shrubs 



2 4 m. high; flowers in late spring) 



Dogwood, Cornus alternifolia* 

 2b. Flowers greenish, inconspicuous, in small axillary clusters 



(tree; flowers in spring) Sour Gum, Nyssa sylvatica. 



3a. Flower clusters small and dense, surrounded by a showy in- 

 volucre of 4 bracts, resembling a corolla of 4 petals 4. 



3b. Flowers in open flattened clusters, without petal-like involucre 

 (shrubs 1 4 m. high; late spring) 5. 



4a. Herbaceous, 3 dm. high or less (flowers in late spring) 



Dwarf Dogwood, Cornus canadensis. 



4b. Tall shrub or tree (flowers in late spring) 



Flowering Dogwood, Cornus florida. 



5a. Leaves distinctly pubescent beneath with woolly or spreading 



hairs 6. 

 5b. Leaves smooth beneath, or pubescent with short appressed 



hairs 9. 



6a. Leaves rough above; fruit white 



Dogwood, Cornus asperifolia. 



6b. Leaves smooth or finely soft-hairy above 7. 



