Ottelia ovalifolia, Australia.
Photo: © J. Wrigley, Australian National Botanical Garden

Ottelia ovalifolia, Australia.
Photo: © J. Wrigley, Australian National Botanical Garden

Ottelia ovalifolia ssp. chrysobasis, Australia.
Photo: © S. Jacobs

Ottelia ovalifolia, growing bath tub with Marsilea mutica.
Photo: S.L. Winterton

Ottelia ovalifolia.
Photo: © M. Fagg, Australian National Botanical Garden

Ottelia ovalifolia.
Photo: © M. Fagg, Australian National Botanical Garden

Ottelia acuminata.
Photo: © K. Yamasaki

Ottelia brasiliensis (Blanch.) Walp.
Photo: © IOPets

Ottelia ovalifolia ssp. chrysobasis.
Photo: © S. Jacobs

Ottelia ovalifolia, juvenile plants, Brisbane, Australia.
Photo: S.L. Winterton

Ottelia mesenterium.
Photo: © Rayon Vert Aqua

Ottelia ulvifolia.
Photo: © H. Barth Dessau

Ottelia ulvifolia.
Photo: S.L. Winterton

Ottelia ulvifolia.
Photo: © IOPets

Ottelia alismoides.
Photo: © H. Barth Dessau

Ottelia alismoides, flower.
Photo: © R. Stroessner

Ottelia alismoides.
Photo: © D. Wilson

Ottelia alismoides.
Photo: © D. Wilson