Merremia verecunda Rendle

Species

Angiosperms > Solanales > Convolvulaceae > Merremia

Characteristics

Herbaceous annual. Stems usually several from base, procumbent, trailing, rather slender, ±1.5 m long, ± angular, glabrous or thinly hairy. Leaves deeply palmately to pedately 7-11-sect, 20-80 mm wide, glabrous above, thinly pubescent beneath; leaflets linear-oblong, narrowly oblong-lanceolate or spathulate-obovate, acute or obtuse, apiculate, contracted at base, lateral ones gradually smaller; petiole 20-60 mm long. Inflorescence 1-flowered or rarely cymosely 2-or 3-flowered; peduncle up to 50 mm long; bracteoles linear or linear-lanceolate, acute, thinly pubescent, 5-8 mm long; pedicels 5-30 mm, at first erect or patent, ultimately reflexed. Calyx turbinate, 10-15 mm long in flower, inflated in fruit; sepals unequal, ovate, subobtuse to acuminate, ±8 mm long, concave, softly pubescent, pale green, with 6 or 7 longitudinal, purple-brown nerves, deeply sulcate-plicate and with small purplish spots, hairy on nerves, very accrescent in fruit; inner ones shorter and narrower, less concave, without or with only a few purplish stripes, not sulcate or plicate, hardly accrescent in fruit. Corolla widely funnel-shaped, 15-20 mm long, 20-30 mm wide, yellow or whitish with purplish centre; limb shallowly 5-lobed to pentagonal; midpetaline areas not distinct, glabrous or thinly pubescent towards base. Capsule completely enclosed by inflated calyx, 4-lobed and somewhat depressed, 8-12 mm wide, pericarp very thin, membranous, scarious, white, sub-hyaline, irregularly dehiscent to 4-valved. Seeds 1-4, black, shiny, smooth, glabrous except for minute flattened hairs along ciliate angles and shortly pubescent hilum; 5-6 mm long.
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Annual herb. Stems trailing. Leaves with blade palmately to pedately 7-11-lobed, 20-80 mm in diameter. Flowers: peduncle usually 1-flowered; stigma globose; calyx turbinate, lobes 10-15 mm long, inflated in fruit enclosing capsule completely, pale green with 6 or 7 conspicuous, longitudinal, purplish red, raised veins on outer lobes, purple-dotted between veins; corolla up to 20 mm long, yellow or whitish with purple centre; Nov.-Apr. Fruit a 4-lobed capsule, 8-12 mm in diameter; seeds black, shiny.
Calyx turbinate, 10–15 mm. long in flower, inflated in fruit; sepals unequal, ovate, subobtuse to acuminate, about 8 mm. long, concave, softly pubescent, with 6–7 purple-brown nerves deeply sulcate-plicate and with small purplish spots, hairy on the nerves, very accrescent in fruit, inner ones shorter and narrower, less concave, without or with only a few purplish stripes, not sulcate or plicate, hardly accrescent in fruit.
Leaves deeply palmately to pedately 7–9 (11)-sect, 2–8 cm. in diam., glabrous above, thinly pubescent beneath; leaflets linear-oblong, narrowly oblong-lanceolate or spathulate-obovate, acute or obtuse, apiculate, tapering at base into the very short portion of the leaf by which they are connected, the lateral ones gradually smaller; petiole up to 5 cm. long.
Inflorescence 1-flowered or occasionally cymosely 2–3 flowered; peduncle 5 mm. long; bracteoles linear or linear-lanceolate, acute, thinly pubescent; pedicels varying in length, at first erect or patent, ultimately reflexed.
Trailing herb. Leaf lamina palmately to pedately 7-11-lobed. Sepals 10-15 mm long in flower, inflated in fruit enclosing capsule completely. Corolla up to 20 mm long. Flowers yellow or whitish with purple centre.
Corolla widely funnel-shaped, 15–20 mm. long, yellow or whitish with a purplish centre; the limb shallowly 5-lobed to pentagonal, glabrous or thinly pubescent towards the base.
Seeds black, shiny, smooth, glabrous except for minute flattened hairs along the ciliate angles.
Stems usually several from the base, procumbent, rather slender, glabrous or thinly hairy.
Capsule completely enclosed by the inflated calyx, somewhat depressed.
A trailing or climbing plant. It produces annual stems 50-150 cm long.
Trailing herb, about 1·5 m. long.
Life form annual
Growth form herb
Growth support climber
Foliage retention -
Sexuality hermaphrodite
Pollination -
Spread -
Mature width (meter) -
Mature height (meter) 1.0
Root system -
Rooting depth (meter) -
Root diameter (meter) -
Flower color
Blooming months -
Fruit color -
Fruiting months -
Nitrogen fixer -
Photosynthetic pathway -

Environment

It is a tropical plant. It grows in deep, dry sand between 930-1,070 m above sea level.
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On patches of grass in deep dry sand at elevations from 930-1,070 metres.
Light -
Soil humidity 1-3
Soil texture 5-6
Soil acidity -
Soil nutriment -
Hardiness (USDA) 8-12

Usage

The leaves are cooked and eaten as a side dish.
Uses -
Edible leaves
Therapeutic use -
Human toxicity -
Animal toxicity -

Cultivation

Can be grown by seedlings.
Mode seedlings
Germination duration (days) -
Germination temperacture (C°) -
Germination luminosity -
Germination treatment -
Minimum temperature (C°) -
Optimum temperature (C°) -
Size -
Vigor -
Productivity -

Distribution

Merremia verecunda world distribution map, present in Botswana, Lesotho, Namibia, South Africa, and Zimbabwe

Identifiers

LSID urn:lsid:ipni.org:names:270597-1
WFO ID wfo-0001297676
COL ID 3ZWNJ
BDTFX ID -
INPN ID -
Wikipedia (EN)
Wikipedia (FR)

Synonyms

Merremia verecunda Ipomoea verecunda Ipomoea quinquefolia var. pubescens