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Dahlia rosea is also known as dahlia variabilis. It is the original of practically all of the old fashioned dahlias.

Dahlia Rosea

Dahlia rosea is also known as dahlia variabilis. It is the original of practically all of the old fashioned…

"Sphaero-crystals of unilin from tuber of Dahlia variabilis. A, precipitated from an aqueous solution; B, precipitated within the cells by long standing in alcohol." -Stevens, 1916

Sphaero-Crystals

"Sphaero-crystals of unilin from tuber of Dahlia variabilis. A, precipitated from an aqueous solution;…