Rhoicissus tridentata (L.F.) Wild & R.B.Drumm.

Species

Angiosperms > Vitales > Vitaceae > Rhoicissus

Characteristics

Shrub with or without scandent branches, or a woody climber up to 10 m or more tall, with tuberous roots and a series of slender rhizomes giving rise to aerial shoots at intervals; young branches glabrous, or fulvous-or cinereous-pubescent, or more rarely ferruginous-tomentose; tendrils glabrescent and usually unbranched except when bearing an inflorescence. Leaves spirally arranged, sessile or petiolate, glabrous or fulvous-or cinereous-pubescent, or more rarely ferruginous-tomentose, 3-foliolate; petioles almost cylindrical, (0-)2-20(-70) mm long; terminal leaflets petiolulate, petiolule (1-)2-4(-12) mm long; lamina narrowly elliptic to broadly obovate, (12-)20-45(-120) mm long, (3-)5-20(-100) mm broad, apex truncate, obtuse or subacute, base cuneate to acute; lateral leaflets petiolulate or sessile, petiolule if present shorter than that of terminal leaflet, (0-)1-2(-8) mm long, lamina narrowly elliptic to ovate, (9-)15-30(-85) mm long, (3-)5-20(-55) mm broad, apex obtuse to acute, base usually asymmetrical with outer side acute to obtuse and inner side cuneate to acute; margin of all leaflets entire to variously toothed but teeth lack a distinct apiculus; acarodomatia sometimes present abaxially in axils of lower lateral veins; stipules ligulate to conical, caducous, ca. 2-3 mm long. Inflorescence a cyme, (1-)5-9(-60)-flowered, leaf-opposed or on tendrils, young parts fulvous-or cinereous-pubescent or ferruginous-tomentose, peduncle (1-)4-5(-14) mm long; bracts deltoid, caducous, ca. 1 mm long. Pedicel (1-)2-3(-4.5) mm long. Calyx cup-shaped with ca. 7-10 ill-defined obtuse ferruginous teeth and pubescent-tomentose. Petals (4)5(6), ovate, 2-3 mm long, 1.5-2.5 mm broad, cream to green, sometimes tinged with pink or red, glabrous on inside, sometimes pubescent-sericeous on outside. Stamens (4)5(6), ca. 2 mm long, anthers dorsifixed and versatile, filaments widening towards base. Disc (4)5(6)-lobed, annular, 2-3 mm wide. Ovary immersed in disc, style-stigma ca. 1-2 mm long, stigma simple, obtuse but becoming slightly bilobed. Fruit a globose to ovoid berry, (5-)6-8(-13) mm long, (5-)8-10(-15) mm broad, turning red and finally purplish-black, sometimes spotted with lenticels. Seeds 1-4, globose with one or two sides flattened when more than one seed is present, 4-6 mm long, 3-6 mm broad, testa smooth with a longitudinal furrow. Fruiting occurs from April to December.
More
Shrub, treelet or more often a woody climber 2–10 m. tall; young branches ferruginous pubescent, later glabrescent; sometimes with ‘potato-like’ roots (fide Tanner) presumably indicating it has tubers; tendrils fulvous pubescent or glabrescent.. Leaves 3-foliolate or rarely 1-foliolate due to fusion of 3 leaflets; leaflets narrowly to broadly obovate, the laterals somewhat asymmetric, 1.5–9(–16) cm. long, 0.7–5.5(–8) cm. wide, truncate to subacute at the apex, cuneate at the base, the laterals often rounded on one side, toothed towards the apex with (1–)3–18 teeth or rarely ± entire, glabrous to densely ferruginous pubescent; petiole 0.2–4 cm. long; petiolules up to 5(–12) mm. long; stipules ± 2 mm. long, tomentose, falling almost at once.. Cymes ± dense, the axes ferruginous pubescent or tomentose; peduncle 2–3 cm. long; pedicels ± 2 mm. long.. Calyx ± 1 mm. long, ferruginous tomentose.. Petals green, red or dark purplish, ± 2 mm. long, glabrous.. Fruit black, globose, 0.7–1.1 cm. in diameter, glabrous.. Seeds 1–4, greyish, ± globose or flattened on one side when paired, 5–6 mm. in diameter, somewhat rugose, with median longitudinal furrow.. Fig. 2.
It is a small neat tree. It grows to 3.6 m high. It can be a climber. It has a very extensive root system with a thickened rootstock or swellings along it. It may have many stems. The young branches are covered with rust-coloured hairs. It has tendrils. The leaves vary greatly in size and shape. They have 3 rigid leaflets. Leaves can be 10 cm long and 7 cm wide. The central leaflet is often triangular. The side leaflets are unequal-sided. Leaflets are glossy green above and paler underneath. The flowers are small and greenish. They occur in clusters opposite the leaves. The fruit is 1.3 cm across. They are smooth and round. They are black when mature. There are 1-2 seeds inside. The fruit is edible.
Leaves 3-foliolate; petiole 0·2–4 cm. long, pubescent or tomentose; stipules up to 2 mm. long, tomentose, very caducous; leaflet-lamina up to 9 × 5·5 cm., narrowly obovate to broadly obovate, apex truncate or more rarely subacute, base cuneate, lateral leaflets cuneate at the base or asymmetrically subcuneate to rounded on one side, margin dentate towards the apex, teeth from 3-c. 18 (in S. Africa forms occur with leaflets entire or with only 1–3 teeth), upper surface glabrous or fulvous-pubescent, lower surface from thinly fulvous-pubescent to densely fulvous-or rarely ferruginous-tomentose (forms with glabrous leaves occur in S. Africa); nerves prominent below; petiolules up to 5 mm. long.
Climber or shrub. Stems scandent or erect; ± 0.5-1.0 m or indefinite. Leaves petiolate or sessile; 3-foliolate; terminal leaflet sessile or with a petiolule, blade narrowly to broadly obovate, base cuneate, apex acute or truncate, lateral leaflets sessile or with short petiolules, apex acute, base asymmetrical, margins entire, toothed or crenate, glabrescent or grey-hairy. Flowers in leaf-opposed cymes or on tendrils. Petals yellowish green. Flowering time Nov.-Mar. Fruit subglobose, 8-10 mm in diam., red to purplish when ripe.
Shrub with branches scandent or erect, to 1 m. Leaves 3-foliolate, leaflets with margins ± entire or terminal leaflet 1-4-toothed or-crenate, glabrescent or grey-hairy. Flowers yellowish green. Fruits subglobose, red to purplish black.
Small shrub c. 2 m. tall sometimes with scandent branches or a tall climber up to 10 m. or more tall; young branches greyish-or fulvous-pubescent or occasionally ferruginous-tomentose; tendrils fulvous-pubescent or glabrescent.
Seeds 1–2, greyish, c. 6 mm. in diam., ± globose, flattened on one side if paired, somewhat rugose with one median longitudinal furrow.
Inflorescences of ± dense cymes; peduncle up to 2(3) cm. long, fulvous-tomentose or-pubescent; pedicels c. 2 mm. long.
Fruit black, up to 1 cm. in diam., globose, glabrous.
Corolla greenish, glabrous.
Calyx fulvous-tomentose.
Life form perennial
Growth form shrub
Growth support climber
Foliage retention
Sexuality -
Pollination -
Spread -
Mature width (meter) 2.01 - 4.01
Mature height (meter) 2.8 - 5.8
Root system rhizome
Rooting depth (meter) -
Root diameter (meter) -
Flower color
Blooming months -
Fruit color
Fruiting months -
Nitrogen fixer -
Photosynthetic pathway -

Environment

A tropical plant. In South Africa it grows from sea level to 1200 m altitude. In some places it can grow to 2,700 m above sea level. It will grow in a range of conditions. It is often at the edge of evergreen forest in high rainfall areas. It grows in areas with an annual rainfall between 380-1,500 mm. It can grow in arid places.
Light 7-9
Soil humidity 1-3
Soil texture -
Soil acidity 2-8
Soil nutriment -
Hardiness (USDA) 8-9

Usage

The fruit is eaten. It is very sour. The large thickened rootstock is edible. It is used for drinks and put into soups. Caution: The tubers are also claimed to be toxic.
Uses animal food food gene source invertebrate food material medicinal poison social use vertebrate poison
Edible fruits roots tubers
Therapeutic use Charm (unspecified), Fruit (unspecified), Sterility (unspecified), Cold (unspecified)
Human toxicity -
Animal toxicity -

Cultivation

Plants can be grown from seeds or cuttings.
Mode cuttings seedlings
Germination duration (days) -
Germination temperacture (C°) -
Germination luminosity -
Germination treatment -
Minimum temperature (C°) -
Optimum temperature (C°) -
Size -
Vigor -
Productivity -

Images

Rhoicissus tridentata unspecified picture

Distribution

Rhoicissus tridentata world distribution map, present in South Africa

Conservation status

Rhoicissus tridentata threat status: Least Concern

Identifiers

LSID urn:lsid:ipni.org:names:870537-1
WFO ID wfo-0000464567
COL ID 4SJX3
BDTFX ID -
INPN ID -
Wikipedia (EN) Link
Wikipedia (FR)

Synonyms

Rhus dimidiata Rhus hirta Toxicodendron tridentatum Cissus pauciflora Rhoicissus usambarensis Rhoicissus tridentata Cissus cirrhiflora Cissus sericea Rhus dimidiatum Rhus tridentatum Rhoicissus dimidiata Rhoicissus sericea Rhoicissus pauciflora Rhoicissus holstii Rhus tridentata Cissus dimidiata Cissus tridentata

Lower taxons

Rhoicissus tridentata subsp. cuneifolia Rhoicissus tridentata subsp. tridentata