COLOR KEY FOR IDENTIFICATION 



OF PLANTS 



FLOWERS WHITE OR NEARLY SO. A, B, C 

 A. Corolla of several similar petals or petal-like sepals. 



1,2,3 



I. Petals normally 3 



Great White Trillium. Trillium grandifloriim. 



Snowy Trillium. Earliest Trillium; blooms in March; a West- 

 em and Southwestern species. Trillium nivale. 



Painted Trillium. Petals white, striped with red. Trillium 

 undiilatum. 



Golden Seal. Petal-hke sepals falling as the flower opens. 

 Hydrastis Canadensis. 



2. Petals normally 4. Corolla cruciform, or petals recurved 



White Cardamine. Flowers white. Cardamine rhomhoidea. 

 Cuckoo-Flower. Flowers white or purphsh. Cardatnine pra- 



tensis. 

 Two-Leaved Dentaria. Flowers white or pale purple. Den- 



taria diphylla. 

 Cut-Leaved Dentaria. Flowers white or pale purple. Den- 

 taria laciniata. 

 Whitlow-Grass. Small, insignificant. Draba verna. 

 Lyre-Leaved Cress. The basal leaves only are lyre-shaped. 



Arabis lyrata. 

 Shepherd's-Purse. Flowers very small at the top of the stem ; 



plant easily known by heart-shaped pod. Capsella bursa- 



pastoris. 

 Flower-of-May. Low plant, with two shining leaves ; usually 



growing in beds; flowers in a crowded terminal raceme, 



petals recurved. Maianthemum Canadense. 



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