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Acanthaceae

Key to Acanthaceae at Kaxil Kiuic

1. Shrubs  ..........................................................................................Aphelandra scabra

1. Herbs

   2. Spikes dense, flowers crowded

      3. Corollas remain closed (cleistogamous)  .................................. Ruellia erythropus

      3. Corollas open (chasmogamous)

         4. Flowers yellow  ...................................................................Tetramerium nervosum

         4. Flowers purple/lavender

            5. Leaves restricted to basal rosettes  .....................................Elytraria bromoides

            5. Leaves at base and along stem  .........................................Elytraria imbricata

   2. Spikes open, flowers well-separated

      6. Corollas red  ...........................................................................Dicliptera sexangulare

      6. Corollas purple/lavender

         7. Calyx lobes unequal, one segment conspicuously longer than the rest; flowering region

            leafy  .......................................................................................Ruellia inundata

         7. Calyx lobes essentially equal; flowering region above the leaves ....Ruellia nudiflora