Synonyms: Gonotheca biflora (homotypic); Hedyotis alsinifolia (heterotypic); Hedyotis biflora (heterotypic); Hedyotis biflora var. uniflora; Hedyotis blumeana; Hedyotis burmanniana (heterotypic); Hedyotis corymbosa ampla; Hedyotis corymbosa tereticaulis; Hedyotis debilis (heterotypic); Hedyotis dichotoma (heterotypic); Hedyotis gracilis (heterotypic); Hedyotis hermanniana; Hedyotis media; Hedyotis multiflora; Hedyotis paniculata (heterotypic); Hedyotis ramosissima (heterotypic); Oldenlandia biflora (heterotypic); Oldenlandia brachypoda (heterotypic); Oldenlandia corymbosa corymbosa; Oldenlandia dichotoma (heterotypic); Oldenlandia multiflora; Oldenlandia radicans (heterotypic); Thecagonum biflorum (homotypic)