Synandra
(from syn, together, and aner, andros, an anther; the posterior and sterile anthers are connate). ORD. Labiatae. A monotypic genus. The species is a hardy, hairy, fibrous-rooted biennial, with the habit of Lamium, and requiring ordinary culture.
S. grandiflora (large-flowered). fl. white or nearly so, solitary in the bracts; corolla 1 1/2in. long; filaments bearded. June. l. membranous, cordate, coarsely crenate, all but the floral ones (which are reduced to ovate, sessile bracts) long-petioled. h. 1ft. to 2ft. North America, 1827.