Halopegia K. Schum.
Pflanzenreich IV. 48: 49-51 (1902).
Rosulate marsh plants. Inflorescence simple or a sparsely branched synflorescence. Florescence component of a single cymule; cymule ± evidently dolichoblastic, axes conspicuously flattened and furrowed, interphyll and bracteoles absent. Sepals strongly unequal; corolla tube very short to obsolete; outer staminode(s) 1, or 2 very unequal, the smaller one sometimes caducous; callose staminode conspicuously large with narrow petaloid rim; cucullate staminode with a simple, rather obsolete appendage near top of the lobe; ovary with 3 ovulate locules, 2 of them poorly developed (to completely empty and compressed). Fruit 1-seeded, caryopsislike, indehiscent. (From Kubitzki, et al., p. 292)
Found in West Africa, the Congo Basin through Southeastern Asia.
Phylogeny and Classification:
An isolated genus without obvious affinities within the family. In some features it shows resemblance to Thalia: organisation of florescence component, short-tubed flowers with very large callose staminodes, and caryopsislike fruits. Interestingly, one of the outer staminodes, and two of the ovary locules are ± reduced in Halopegia, and the two genera are the only ones in which an additional adaxial air lacuna has been demonstrated in the leaf axis. [per Kubitzke, K., ed., The Families and Genera of Vascular Plants, 1998]
Comprises of about four species.
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