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Key to Asystasia
Acanthaceae
Asystasia
https://fsus.ncbg.unc.edu/main.php?pg=show-key.php&keyid=41149
1 Flowers cream, yellow to pinkish-purple, the corolla tube >2 cm long;; calyx lobes 6-9 mm long; anther ca. 3 mm long; style 15-22 mm long; fruit 3.5-4 mm long
1 Flowers white with purple spot on lower lip of corolla, the corolla tube < 2 cm long; calyx lobes 4-6 mm long; anther ca. 1.5 mm long; styles 5-10 mm long; fruit 1.5-2.5 mm long