General Key to the Families 27 



flowers solitary or cymose, regular, hypogynous, the petals mostly 

 oblique, convolute in the bud; fruit the pod one-celled with two- 

 five parietal placentae, seeds numerous, small, anatropous, with no 

 albumen. 



I. HYPERICUM. (Tourn.) L. 



i. H. Scouleri. Hook. Scouler's St. John's-wort. 



ORDER XXIV. VIOLALES 

 XLVI. VIOLACE^:. VIOLET FAMILY 



Herbs perennial or annual; leaves basal or alternate, simple, 

 with stipules; flowers axillary, nodding, corolla irregular, one- 

 spurred or gibbous of five petals imbricated in the bud; fruit a 

 capsule, ovoid, seeds with a hard smooth coat. 



I. VIOLA. (Tourn.) L. 



1. V. canadensis. L. Canada Violet. 



2. V. nephrophylla. Greene. Early Violet. 



3. V. adunca. Smith. Dog Violet. 



4. V. Selkirkii. Pursh. Selkirk's Violet. 



5. V. palustris. L. Marsh Violet. 



6. V. glabella. Nutt. Yellow Violet. 



7. V. orbiculata. Geyer. Round-leaved Yellow Violet. 



8. V. sempervirens. Greene. Trailing Yellow Violet. 



ORDER XXV. MYRTALES 

 XLVII. EL^AGNACE^:. OLEASTER FAMILY 



Shrubs or small trees ; leaves silvery-scurfy or stellate-pubescent, 

 entire, opposite or alternate; flowers perfect-polygamous or dioeci- 

 ous, clustered in the axils or at the nodes of twigs of the previous 

 season, rarely solitary; fruit drupe-like, the base of the calyx be- 

 coming thick and pulpy, strictly inclosing the achene or nut. 



I. EL^AGNUS. (Tourn.) L. 



i. E. argentea. Pursh. Silvcrberry. 

 II. SHEPHERDIA. Nutt. 



i. S. canadensis, (L.) Nutt. Canada Buffaloberry. 





