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Deciduous trees. Lvs opposite, petiolate, simple; lamina large, ovate or shallowly 3-lobed, mostly entire but toothed in young plants. Infl. a large, terminal cymose panicle of many fls, produced before the lvs. Calyx deeply 5-lobed; lobes equal. Corolla tubular-or campanulate-funnelform, generally mauve; limb somewhat oblique, ± bilabiate with 5 subequal lobes. Stamens 4, included. Capsule ± ovoid, loculicidal; valves woody. Seeds numerous, fairly large, with surrounding broad wing.
Cal nearly regular, coriaceous, the 5 broad lobes separate to the middle; cor evidently bilabiate, its lobes shorter than the tube, the upper reflexed, the lower spreading; stamens 4, included; pollen-sac divergent; style elongate, very shortly bilobed; fr woody, ovoid 2-locular, loculicidal; seeds flattened, winged, with rather scanty, oily endosperm; trees with opposite or whorled simple lvs and showy, blue or violet fls in terminal panicles. 17, e. Asia.
