Herbs perennial, glabrous nearly throughout. Stems 60-120 cm, solitary, internodes sometimes longer than leaves. Basal leaves absent; stem leaves conspicuously long petiolate except for a few upper floral leaves; petiole ciliolate; leaf blade oblong-lanceolate, to 15 cm including petiole, smaller and sometimes subcircular in upper leaves, membranous, glabrous or sparsely strigose, base rounded or sometimes cordate, margin serrate-crenate, apex acute. Verticillasters few, ca. 6-flowered. Flowers sessile. Calyx minutely hispid, slightly oblique, ca. 1 cm, conspicuously 5-veined; teeth broadly triangular, rigid, apex obtuse. Corolla red or white, ca. 1.9 cm; upper lip galeate, hirsute outside; lower lip oblong, undulate, lateral lobes smaller. Stamens included; filaments dilated below middle, puberulent. Nutlets subglobose, glabrous, adaxially ribbed (specimens not seen).
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A herb. It keeps growing from year to year. The above ground stems are 60-120 cm high. They occur singly. The stem leaves have long leaf stalks. The leaf blade is oblong to sword shaped and can be 15 cm long. There are teeth along the edge. There are about 6 flowers in a ring. The flowers are red or white. The nutlets are round but flattened.
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