Tall vinelike herb or climbing shrub to 4m with square branches, red tomentose above, glabrous below. Crenulate leaves to 40mm x 20mm, glabrous or pilose above & densely white pilose beneath. Terminal dichasa frequently to 3 flowers or few-flowered corymbs of yellow flowers to 30mm x 15mm, calyx lobes 9mm x 4mm, puberulent outside, corolla to 20mm long, upper lip to 12mm long, lower lip to 32mm long.