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Description


Twiners, prostrate or erect herbs, or low shrubs. Leaves petiolate, entire, dentate, lobed or palmately or pedately partite. Flowers few to many in axillary cymes or flowers solitary. Bracts small. Sepals subequal, often enlarged in fruits. Corolla funnel-shaped or campanulate, white or yellow to orange, glabrous with 5 distinctly veined midpetaline bands, limb 5-lobed. Stamens included. Ovary 2 or 4-celled, style 1, filiform, stigma 2-globular. Fruit a capsule, 4-valved or irregularly dehiscent. Seeds glabrous, pubescent  or villose margin.

Key to the species

Serial Key Reference
1a. Leaves kidney shaped or ovate; peduncle less than 5 mm long M. emarginata
1b. Leaves not kidney shaped or ovate; peduncle more than 1 cm long 2
2a. Leaves shallowly or deeply 5-7 lobed, corolla 4-6 cm long, yellow M. vitifolia
2b. Leaves entire, crenate or at most 3-lobed 3
3a. Corolla pilose outside on the midpetaline bands; white yellow or rarely orange, 2.0-3.5 cm long M. umbellata
3b. Corolla glabrous throughout outside 4
4a. Sepals acute, attenuate; prostrate, leaf base truncate to hastate, at base crenate to dentate margin M. tridentata
4b. Sepals obtuse or emerginate 5
5a. Sepals subeqeal, outer ones broadly obovate to orbicular or broadly spathulate, distinctly concave M. hederacea
5b. Sepals distinctly unequal, outer ones elliptic, more or less flat. M. hirta