Physostegia virginiana (L.) Benth. [ Dracocephalum virginianum L.]
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Physostegia virginiana (L.) Benth. [ Dracocephalum virginianum L.] [Labiatae]
J. Barrellier, Pl. Galliam Hispaniam Italiam Obs.: t. 1152-1155, fig. 1152 (1714)