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Floral colour and floral shape diversity present within Ruellia. (A) R. speciosa. (B) Ruellia macrantha. (C) Ruellia longipedunculata. (D) Ruellia hirsuto-glandulosa. (E) Ruellia bourgaei. (F) Ruellia saccata. (G) Ruellia biolleyi. (H) R. breedlovei. (I) Ruellia californica. (J) Ruellia noctiflora.
