Accepted name/Authority/Place of publication:
CORDISEPALUM Verdc., Kew Bull. 26: 138. 1971;
Tribe:
Cardiochlamyeae
Type Species:
Cordisepalum thorelii (Gagnep.) Verdc.
Habit:
Lianas, lower stem woody, glabrescent, upper branches herbaceous, tawny or ferruginous, velutinous.
Leaves:
Leaves petiolate; blade ovate-cordate, entire, chartaceous; venation pedate at base, alternate above, veins prominent abaxially; petiole slender, terete, slightly pulvinate.
Inflorescences:
Inflorescence axillary, racemose, paniculate or thyrsiform, anthesis proceeding acropetally; bracts foliaceous, texture, indumentum and venation like the leaves; bracteoles 3, scale-like, forming a calycle just below calyx.
Flowers:
Flowers small, numerous; sepals 5, free, quincuncial, clasping corolla tube base, unequally accrescent in fruit; outer 3 sepals greatly enlarged, subcircular or broadly ovate, base cordate, inner 2 sepals slightly enlarged; all thinly chartaceous, veins reticulate, dark. Corolla rotate, tube short, limb 5-lobed or parted to below middle, lobes reflexed at anthesis, valvate in bud. Stamens 5, equal, slightly exserted, filaments in lower half fused to corolla tube, free and filiform above; anthers oblong to broadly ellipsoid, longitudinally dehiscent; pollen 3-colpate, nonspinose. Pistil included; disc not obvious; ovary 1-celled, glabrous; ovules 4 (or 5), basal, erect; style simple or absent; stigma terminal, biglobose, lobes slightly longer than broad, coarsely wrinkled.
Pollen:
Pollen 3-colpate, nonspinose.
Fruits:
Fruit a papery utricle, ellipsoid or fusiform, apiculate by persistent style, borne on a stalk, velutinous, enclosed by greatly accrescent calyx; outer 3 sepals greatly enlarged, subcircular or broadly ovate, base cordate, margins free, inner 2 sepals only slightly enlarged; sepals all thinly chartaceous, midvein 1, finer veins reticulate, prominulous, dark.
Seeds:
Seed 1, ellipsoid, smooth, glabrous; hilum basal, circular.
Distribution:
Northeast India, southern China, Laos, Cambodia, Vietnam, and Thailand. map
Countries:
India
China
Laos
Myanmar
Cambodia
Vietnam
Thailand
Number of Species:
2
Infrageneric Characters:
The features that distinguish Cordisepalum from Poranopsis are the rotate, deeply parted corolla and the stalked utricle.
References:
Verdcourt, Kew Bull. 26:138. 1971.
G. Staples, Flora of Thailand Convolvulaceae 10(3): 377 (2010).
Contributors:
Classification:
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