Morphological characteristics

Through river vines, perennial herbs. There are wooden perennial roots, many branches, prone to rooting at the festival; Single leaves opposite;

Nearly sessile; leaf blade spatulate, obovate to obovate-lanceolate, 1-3 cm long, 0.5-1.5 cm wide, base narrowly cuneate, margin serrate above middle of margin, apex obtuse or suborbicular, both surfaces hair. Spikes axillary, cylindrical or ovate, 0.5-3 cm long, 6 mm wide, 1--7 cm long with inflorescences awake; bracts broadly obovate, ca. 3 mm wide; calyx membranous, ca. 2 mm; corolla white, Pink to purple; Stamens 4, born in the middle of the tube. When it is light yellow, about 1.5mm long, it is hidden within the calyx, and it splits into 2 small nuts at maturity. Flower, fruit period from June to October.

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