Ser. Compactae Maximowicz.

Plants ± woody. Stems usually many branched apically. Leaves alternate or sometimes opposite basally, ovate to linear-lanceolate, margin crenate and double dentate. Inflorescences racemose or flowers axillary; bracts sessile. Calyx deeply cleft anteriorly, 2-lobed. Corolla large; tube ca. 2 X as long as calyx or shorter; beak distinct.