COLOR KEY 



FLOWERS YELLOW OR YELLOWISH GREEN. A, B, C 



A. Corolla of several similar petals, i, 2, 3 



I. Petals normally 4 



Celandine. Corolla of buttercup type. Chelidonium majus. 

 Yellow Rocket. Corolla cruciform. Barbarea vulgaris. 



2. Petals normally 5. Corolla saucer-like, flat, or petals incurved 



Early Buttercup. Corolla saucer-like. Ranunculus fascicu- 



laris. 

 Swamp-Buttercup. Corolla saucer-like. Ranunculus septen- 



trionalis. 

 Bulbous Buttercup. Corolla saucer-like. Ranunculus hulhosus. 

 Small-Flowered Buttercup. Corolla of five, small, pointed 



petals. Ranunculus abortivus. 

 Marsh-Marigold. Marsh plant; flowers brilliant yellow. 



Caltha palustris. 

 PoTENTiLLA. Flowers look like yeUow strawberry blossoms. 



Potentilla Canadensis. 

 Wood-Sorrel. Foliage acid to the taste. Oxalis stricta. 

 Golden Meadow-Parsnip. Flowers small, borne in an umbel; 



petals incurved. Zizia aurea. 

 Sanicle. Coarse plant with small flowers. Sanicula Mary- 



landica. 



3. Petals, or perianth-segments, normally 6. Corolla lily-like or 



star-like 



Large-Flo\vered Bellwort. Pale yellow. Uvularia grandi- 



flora. 

 Perfoliate Bellwort. Pale yellow. TJvidaria perfoliata. 

 Sessile-Leaved Bellwort. Pale yeUow. Uvularia sessilifolia. 

 Adder's-Tongue. Bright or tawny yellow; there is a white 



species. Erythronium. 

 Yellow Clintonia. Greenish yellow. Clintonia borealis. 

 Indian Cucumber-Root. Greenish yeUow; stem has two whorls 



of leaves. Medeola Virginiana. 

 DiSPORUM. Yellowish green, at first lily-like, later star-like. 



Disporum lanuginosum. 



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