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Corolla rotate, tube short, lobes equalling calyx in number or one more, entire, subequal, spreading.
Leaves alternate, petiolate, suborbicular-reniform, crenate to incised.
Flowers axillary, 4-to 8-merous, solitary or fasciculate, pedicellate.
Perennial, small, creeping herbs; stems rooting at nodes.
Seeds few, oblong-ovoid, reticulate or smooth.
Capsule somewhat compressed, loculicidal.
Calyx 4–8-lobed, lobes somewhat unequal.
Style short, stigma capitate.
Pedicels ebracteate.
