Rubus megacarpus P.Royen

Species

Angiosperms > Rosales > Rosaceae > Rubus

Characteristics

Climbing or scrambling shrubs. Stems up to 10 m long, densely hairy, prickles many, short, curved, some cataphylls at base of lateral shoots. Leaves 3-foliolate, petiole 1.5-5 cm long. Stipules not always present, on the petiole, filiform to linear, 4-6 by 0.1-0.5 mm, early falling. Leaflets obovate to elliptic, 3-6 by 2-3 cm, lateral ones usually relatively narrower than apical one, shallowly serrate in upper part only, apex rounded to truncate, with or without apiculus, stiff-coriaceous, nervation pinnate with 5-7 pairs of steeply ascending nerves, venation transverse, glabrous above, lower surface densely woolly all over and with appressed straight hairs on midrib and nerves. Inflorescence a simple raceme, axillary, up to 12 cm long, rachis stiff, with up to 5 flowers, often reduced to only the terminal flower. Bracts 5-9 by 1.5-3 mm, persistent, also empty ones under the flowers. Pedicels up to 4 cm long, densely hairy as is rachis. Flowers uni-or bisexual. Hypanthium saucer-shaped, 6-10 mm across, densely hairy outside. Sepals broadly ovate, 9-12 by 8-11 mm, inner ones slightly narrower than outer ones, obtuse and apiculate, shortly woolly and with appressed hairs outside, pale purplish. Petals obovate, 13-20 by 8-13 mm, densely long-hairy in basal half outside, (pinkish or greenish) white. Stamens 70-100, filaments up to 10 mm, with long hairs, anthers up to 2 mm long, staminodes in female flowers minute. Pistils c. 150, ovaries densely hairy, on high, densely hairy torus, style up to 3 mm long, pistillodes in male flowers minute. Collective fruits large, up to 5.5 by 4 cm when living, most of the pistils developing, sepals appressed to spreading after anthesis. Fruits closely packed, up to 9 by 7 mm when dry, exocarp densely whitish-hairy, purplish, mesocarp still thick when dry, stone up to 8 by 6 mm.
More
A straggling shrub. It grows 1.5 m long. The flowers are greenish white. They can occur singly on in groups of 2-3. The fruit are oval and purplish grey. They can be 5.5 cm long by 4 cm across.
Life form perennial
Growth form shrub
Growth support -
Foliage retention deciduous
Sexuality hermaphrodite
Pollination -
Spread -
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Flower color
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Nitrogen fixer -
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Environment

It is a tropical plant. It has been recorded at 3,750 m above sea level on Mt Wilhelm in Papua New Guinea.
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Usage

Uses food
Edible -
Therapeutic use -
Human toxicity -
Animal toxicity -

Cultivation

Mode -
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Optimum temperature (C°) 14 - 20
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Distribution

Rubus megacarpus world distribution map, present in Papua New Guinea

Identifiers

LSID urn:lsid:ipni.org:names:738327-1
WFO ID wfo-0001000363
COL ID 6X9LP
BDTFX ID -
INPN ID -
Wikipedia (EN)
Wikipedia (FR)

Synonyms

Rubus megacarpus