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Genus Rostellularia Family Acanthaceae

Description: Prostrate to ascending herbs, usually with ± angular stems, ± constricted at nodes.

Leaves with large curved cystoliths and sometimes smaller straight cystoliths on upper surface.

Inflorescences terminal, dense spikes of decussate, usually overlapping bracts, each bract subtending 1 flower; bracts frequently with hyaline margins; bracteoles smaller than bracts. Calyx segments usually 4, with hyaline remnant of fifth. Corolla tube widening above, 2-lipped. Stamens 2. Ovary with 2 ovules per loculus.

Capsule ellipsoid; seeds 1–4, circular, compressed, tuberculate.


Photo © ANBG

Distribution and occurrence: World: c. 20 species, tropical & subtropical Africa, Asia, Malesia & Australia. Australia: 2 species (native), Qld, N.S.W., N.T., S.A., W.A.

Text by J. Everett
Taxon concept:

 Key to the species 
1Apex of the bract obtuse, margin of the bract conspicuously white (or purple) hyaline all aroundRostellularia obtusa
Apex of the bract acute, margin of the bract often white hyaline, but not right around the apexRostellularia adscendens

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