42 General Key to the Families 



2. A. Howellii. Greene. Mouse-ear Everlasting. 



3. A. parvi folia. Nutt. Mountain Everlasting. 



4. A. lanata. (Hook.) Greene. Arctic Everlasting. 



5. A. pulcherrima. Greene. Tall Everlasting. 



6. A. alpina. Gray. Alpine Everlasting. 



7. A. media. Greene. Silky Everlasting. 



8. A. rosea. Greene. Pink Everlasting. 

 VI. Anaphalis. DC. 



I. A. margaritacea. (L.) B. and H. Pearly Everlast- 

 ing. 



TRIBE HELIANTHE^ 



VII. RUDBECKIA. L. 



I. R. hirta. L. Black-eyed Susan. 

 VIII. Helianthus. L. 



I. H. giganteous. L. Giant Sunflower. 



TRIBE HELENINE^ 



IX. Gaillardia. Foug. 



I. G. aristata. Pursh. Brown-eyed Susan. 



TRIBE ANTHEMIDE^ 



X. Achillea. (Vaill.) L. 



1. A. lanulosa. Nutt. Woolly Yarrow. 



2. A. borealis. Bong, Dark-margined Yarrow. 

 XL Chrysanthemum. (Tourn.) L. 



I. C. Leucanthemum. L. Ox-eye Daisy. (Introduced.) 

 XII. Artemisia. L. 



1. A. frigida. Willd. Pasture Wormwood. 



2. A. discolor. Dougl. Green Wormwood. 



3. A. biennis. Willd. Biennial Wormwood. 



TRIBE SENECIONE^ 



XIIL Petasites. (Tourn.) Hill. 



1 p. palmatus. (Ait.) Gray. Palm-leaved Coltsfoot. 

 i p. sagitatus. (Pursh.) Gray. Arrow-leaved Colts- 

 foot. 

 >, P. fri^ridus. CL.) Fries. Arctic Coltsfoot. 



