Grewia occidentalis

Grewia occidentalis L.

Cross-berry, Four-corners, Button-wood, Bow-wood

Afr

Kruisbessie

isiZulu

iLalanyathi

IsiXhosa

umNqabaza

Description

Family:

Malvaceae (formerly Tiliaceae)

Order:

Malvales

Description

Grewia occidentalis is a scrambling deciduous small tree, growing up to 3–6 m high, sometimes as a bushy climber.

The branches are unarmed or pubescent, older bark smooth and grey, younger twigs reddish brown.

Leaves are simple, elliptic to ovate, 3-veined from the base, 3–14 cm long, shiny green above, paler and slightly hairy below; margins are scalloped or minutely toothed.

Flowers are purple, mauve, pink, or rarely white double star-shaped flowers (1.5–3.5 cm across) appear in spring and summer (Oct–Jan), sometimes sporadically through the year.

Fruit is a distinctive four-lobed berry (drupes) up to 1.5 cm, shiny reddish-brown or purple, persisting on the tree long after maturity.

Plant Details

Height

3 – 6m as shrub or small tree; can scramble higher in forests

Thorns

No thorns, but young branches are rough

Soil

Prefers sandy or loam soils; adapts to arid Karoo, rocky hillsides, grassland, coastal bush, and montane forest margins

Moderate; quick after good rains, slower in dry shade, easy garden grower

Growth Rate

3 – 6m as shrub or small tree; can scramble higher in forests

Size

Perennial, decades if undisturbed; a legacy garden and bushveld shrub

Lifespan

Flower Colour

Flowering Season

, , , ,

Horticultural Zones

5.5–7.5

pH

Prefers sandy or loam soils; adapts to arid Karoo, rocky hillsides, grassland, coastal bush, and montane forest margins

Soil

Full sun, semi-shade, shade; will grow in dappled forest sun, north/west-facing slopes, bushclumps

Aspect

Moderate to high; resists light frost, but leaves may drop in hard winters

Frost Tolerance

High; survives long dry spells, flourishes after rain when established

Drought Resistance

Companion Plants

Pairs well with Diospyros lycioides, Searsia/Rhus spp., Buddleja saligna, and indigenous grassland forbs; effective in bushclump, restoration, and wildlife

Caterpillars

Butterflies: Hesperiidae: Eagris nottoana (Rufous-winged Flat), Abantis cassualalla (White-lined Ragged Skipper), Abantis canopus (Buff-tipped Ragged Skipper); Nymphalidae: Acraea horta (Garden Acraea). Moths: Crambidae:Lygropia tetraspilalis; Erebidae:Knappetra fasciata stellata, Serrodes partita, Euproctis terminalis, Marblepsis flabellaria, Olapa flabellaria, Pteredoa monosticta, Anomis sabulifera, Gonitis sabulifera, Marblepsis flabellaria, Netrobalane canopus; Geometridae:Menophra jansei, Ascotis reciprocaria, Eupithecia infelix, Discomiosis arciocentra; Gracillariidae:Phyllonorycter anchistea; Limacodidae:Latoia vivida; Metarbelidae: Lebedodes sp., Metarbela tuckeri, Orthabela rufithorax; Nepticulidae: Stigmella charistis, Stigmella grewiae; Noctuidae: Androlymnia torsivena, Brevipecten cf cornuta, Chasmina vestae; Nolidae: Acripia chloropera, Patania tchadalis; Notodontidae: Atrasana uncifera, Anaphe reticulata, Kotochalia junodi; Sphingidae: Lophostethus dumolinii, Rufoclanis numosae; Yponomeutidae: Yponomeuta sistrophora.

Associations

Descriptions

Insects: Host for butterfly Rufoclanis numosae and moth Anaphe reticulata; attracts pollen/nectar-feeding bees, butterflies, beetles.
Wildlife: Fruit eaten by birds (turdidae, bulbuls), monkeys, baboons, and squirrels. Nectar attracts insects that fuel garden and bushveld food webs. Dense clumps provide nesting and shade for small birds, reptiles, and insects.

Soil: Not nitrogen-fixing; stabilizes soil and covers bare areas in bushclumps and rocky outcrops.
Other Flora: Grows with grasses, bushveld forbs, and shrubs; provides vertical and groundcover habitat for understorey seedlings.

Ecosystem Services: Used for habitat restoration, slope stabilization, bush and woodland rehabilitation, and as a garden hedge; enhances pollinator diversity and supports fruit dispersal ecological processes.

Flowers and fruits

Pollinators: Bees, butterflies, beetles; cross-pollination is required for fruit set due to protandrous flowers.
Fruit/Seed Dispersers: Birds, monkeys, baboons, squirrels, gravity; seeds germinate better after passing through animal gut.
Wildlife Interactions: Fruit can persists on the tree for months, sustaining local fruit-eating fauna, especially in dry seasons.

Birds

Fruits consumed by bulbuls, thrushes; bushclump and tree are nesting and perching sites for small birds; attracts insectivorous birds due to flower visitors.

By Seeds:

Yes. Best propagated from seeds collected when fruit softens purple; optimal germination after passage through animal gut (monkey/baboon), but direct sowing in moist, compost-rich soil works. Germination generally fair to good; plant in spring.

By Cuttings:

No. There are no consistent reports of successful cutting propagation; seed is preferred.

Traditional Uses

Historical Uses: Wood used for tool handles, bows; fruit sometimes fermented with beer or goats’ milk for local foods. Hedge, shelter, traditional indicator in gardens and kraals.
Medicinal Uses: Bark/roots used for colds, diarrhea, wounds, and as blood tonic or eye wash. Fruit and roots infused or decocted for bariatric and urinary troubles in Zulu, Sotho traditions.
Toxicity: No major toxicity documented; edible fruit may cause mild upset if eaten green.

Pharmacological Action: No widely published phytochemical studies; usage indicates mild anti-inflammatory, astringent properties.
Bioactive phytochemicals: Not documented in main portals.
Livestock & Fodder: Not significant fodder, occasionally browsed; fruit safe for domestic animals.
Cultural Significance: Widely planted as a “good luck” hedge or garden plant, admired for biodiversity value and wildlife associations in southern African cultural gardens.

Plant Details

Height

Description

Thorns

Description

Leaves

Description

Size

Growth Form

Size

Size

Size

Lifespan

Size

Flower Colour

Size

Flowering Season

Size

Horticultural Zones

Size

pH

Size

Soil

Size

Aspect

Size

Frost Tolerance

Size

Drought Resistance

Description

DESCRIPTION

Height

DESCRIPTION

Leaves

DESCRIPTION

Thorns

DESCRIPTION

BSS

Ecoscore

Host plant Nectar Grazing

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Distribution

Companion Plants

Description

Caterpillars

Associations

Leaves

Leaves

Flowers and fruits

Leaves

Birds

Leaves

Mammals

Leaves

By Seeds:

Leaves

By Cuttings:

Leaves

Traditional Uses

traditional uses