Dipteropeltis
Accepted name/Authority/Place of publication:
DIPTEROPELTIS Hallier f., Jahrb. Hamb. Wiss. Anstalt 16 Beih. 3: 4. 1899.
Tribe:
Poraneae
Type Species:
Dipteropeltis poranoides Hallier f., Jahrb. Hamb. Wiss. Anstalt 16 Beih. 3: 4. 1899.
Habit:
Liana.
Leaves:
Simple, petiolate; blade subcordate-obovate, apex acuminate, chartaceous; venation pinnate.
Inflorescences:
Axillary panicles, or in paired dichasia; bracts and bracteoles minute, linear.
Flowers:
Small, bisexual. Sepals 5, free, unequal, overlapping to 3/5 their length; inner 3 ovate-lanceolate, outer 2 ovate, longer and mainly broader, after flowering greatly accrescent and forming around the capsule a large, orbicular-reniform, membranous, pellucid, palmately multinerved, thinly reticulate-venose wing. Corolla campanulate, much larger than calyx, deeply 5-lobed, lobes induplicate-valvate, thicker at middle and thinner toward margins. Stamens inserted on lower part of corolla, basally broadened and glandular-villous, filamentous above, anthers ellipsoid-oblong, frequently emarginated, introrse, dehiscing lengthwise; disc tiny, cupuliform, small; ovary long-conoidal, incompletely 1-celled, 2-ovulate, style deeply bifid, branches terminating in linear-oblong stigmas.
Pollen:
Capsule ovoid-conical, surrounded by the two greatly enlarged outer sepals, splitting from the base into linear plates/layers.
Fruits:
Capsule ovoid-conical, surrounded by the two greatly enlarged outer sepals, splitting from the base into linear plates/layers.
Distribution:
Tropical Africa. map
Countries:
Cameroon
Gabon
Angola
Central African Republic
Congo
Zaire
Number of Species:
1
References:
Hallier, H. 1899. Dipteropeltis, eine neue Poraneengattung aus Kamerun. Jahrb. Hamb. Wiss. Anstalt 16 Beih. 3: 4–5. 1899.
Lejoly, J. & S. Lisowski. 1993. Les Convolvulaceae dans la flore d’Afrique Centrale (Zaïre, Rwanda, Burundi). Fragm. Flor. Geobot. 38(2): 366–368.
Stefanovic, S., L. Krueger, R.G. Olmstead. 2002. Monophyly of the Convolvulaceae and circumscription of their major lineages based on DNA sequences of multiple chloroplast loci. Amer. J. Bot. 89(9): 1510–1522.
Contributors:
A single, variable and wide-spread African species. Molecular data (Stefanovic et al. 2002) pairs Dipteropeltis with the Madagascan endemic genus Rapona; the two are morphologically dissimilar, save for the shared feature of elongate stigmas.