According to Cássio van den Berg, who studied their phylogeny, Loefgrenianthus is closely related to Leptotes and both form a sister clade to another small clade that includes Pseudolaelia, Constantia and Isabellia.
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The Danish Botanist Johan Albert Constantin Löfgren lived many years in Brazil where he was studying the flora of Minas Gerais State, painting watercolors of plants and was a director of Rio de Janeiro Botanical Garden.