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Of the Composite family (Compositae): left, New York aster (Aster Novi-Belgii); right, Tradescant's aster (Aster Tradescanti).

New York Aster and Tradescant's Aster

Of the Composite family (Compositae): left, New York aster (Aster Novi-Belgii); right, Tradescant's…

A variety of dahlias of the Composite family.

Dahlias

A variety of dahlias of the Composite family.

Of the Composite family (Compositae): left, white snakeroot (Eupatorium urticaefolium); right, boneset (Eupatorium perfoliatum).

White Snakeroot and Boneset

Of the Composite family (Compositae): left, white snakeroot (Eupatorium urticaefolium); right, boneset…