Dioscorea hastifolia Nees

Species

Angiosperms > Dioscoreales > Dioscoreaceae > Dioscorea

Characteristics

Tuber cylindroidal, 10–25 cm long, to 1.5 cm diam., sometimes branched. Stems twining, to 2 m long, terete, glabrous. Bulbils absent. Leaves: lamina linear to narrowly triangular, 15–90 mm long, 1.5–20 mm wide, usually hastate or rounded at base (rarely truncate or cuneate), acute at apex, 1–5-veined, glabrous; petiole 1–4 mm long. Male flowers: spikes 1–3 per axil, to 10 cm long, sometimes branched; sepals and petals ovate, 1–2 mm long, yellow; stamens 6. Female flowers: racemes 1 or 2 per axil, to 9 cm long; perianth slightly smaller than male; staminodes 6. Capsule suborbicular to broadly ovate in lateral view, truncate or rounded at apex, rarely obcordate, 12–23 mm long; lobes 7–12 mm wide. Seeds 3.5–4 mm long; wing 1–3 mm wide.
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A yam. A scrambling or twining shrub. It has a slender vine and a tuberous root. Plants die back and re-grow from this tuberous root. The plant can grow to 2 m high. The leaves vary a lot in shape and size. They can be 8 cm long but are more often 2-3.5 cm long by 0.5-1.5 cm wide. The leaves have 3-5 prominent veins. Male and female flowers are on separate plants. The male flowers are in spikes 1-3 cm long. The female plants produce winged fruit. These are about 2 cm long. The yams are cylindrical and 2-3 cm across.
Life form annual
Growth form herb
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Sexuality dioecy
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Mature height (meter) 2.0
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Nitrogen fixer -
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Environment

A tropical plant. It grows in temperate and subtropical places. It grows in fertile soils. It needs a sunny situation and a well drained soil.
More
Grows in granitic and basaltic soil in open forest, woodland and shrub communities.
Light -
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Usage

Uses -
Edible roots tubers
Therapeutic use -
Human toxicity -
Animal toxicity -

Cultivation

It is grown from shoots and the tips of the yam tubers. It can also be grown from seed.
Mode seedlings
Germination duration (days) 21 - 36
Germination temperacture (C°) 21 - 23
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Images

Dioscorea hastifolia unspecified picture
Dioscorea hastifolia unspecified picture

Distribution

Dioscorea hastifolia world distribution map, present in Australia

Identifiers

LSID urn:lsid:ipni.org:names:318045-1
WFO ID wfo-0000390865
COL ID 36CQL
BDTFX ID -
INPN ID -
Wikipedia (EN) Link
Wikipedia (FR)

Synonyms

Dioscorea hastifolia