Croton gratissimus

Croton gratissimus Burch.

Lavender Croton, Lavender Fever Berry

Afr

Bergboegoe, Korannaboegoe, Laventelbos, Laventelkoorsbessie

isiZulu

ilabele, inkubathi, isikhumampuphu

IsiXhosa

Description

Family:

Euphorbiaceae

Order:

Malpighiales

Description

Croton gratissimus is a slender, deciduous shrub or small tree with a V-shaped crown and drooping branches, typically 2–10 m high in South Africa, and up to 20 m further north.

The leaves are simple, alternate, dark green above and strikingly silvery beneath, dotted with cinnamon scales.

The plant produces spikes of small, cream to golden-yellow flowers (about 10 cm long), with fruit ripening from green to yellow three-lobed capsules which explosively disperse seeds in late autumn.

Aromatic when crushed, it stands out visually and is ecologically prominent in rocky, stony habitats

Plant Details

Height

RSA: 2–10 m, Tropical Africa: < 20 m

Thorns

Absent

Soil

Prefers stony or rocky soils; adaptable to a range of sandy or loamy soils.

Slow when young, accelerates as matures.

Growth Rate

RSA: 2–10 m, Tropical Africa: < 20 m

Size

30 - 50 years

Lifespan

Flower Colour

Flowering Season

, ,

Horticultural Zones

6 - 7.5

pH

Prefers stony or rocky soils; adaptable to a range of sandy or loamy soils.

Soil

Full sun, often found on western slopes, but tolerates a range of aspects.

Aspect

Frost-hardy when mature

Frost Tolerance

High

Drought Resistance

Companion Plants

Works well with drought-resistant trees and shrubs occupying different flowering times and niches—e.g., Acacia spp., Searsia spp., and other woodland or savannah trees.

Caterpillars

Butterfly: Charaxes candiope (Green-veined Emperor). Moths: Geometridae - Zeuctoboarmia cataimena, Mictoschema swierstrai, Spodoptera triturata; Gracillariidae - Stomphastis cardamitis, Stomphastis rorkei; Gracillariidae - unkown sp.; Nepticulidae - Stigmella varii; Noctuidae - Amyna punctum; Notodontidae - Stemmatophalera curvilinea; Saturniidae- Epiphora scribonia

Associations

Descriptions

 

Insects: Supports a wide range of caterpillars, notably the Green-veined Emperor (Charaxes candiope), which feed on the leaves; various bees and insects visit the flowers for nectar and pollen.
Soil: Presence may aid in microhabitat stabilization on slopes.
Wildlife: Fruit is eaten by birds (see below); elephants and kudu have been observed browsing the foliage, but the plant makes up a minor component of their diets.
Ecosystem Services: Croton gratissimus is useful in restoration on degraded rocky slopes, prevents erosion, and attracts pollinators, birds, and insects.

Flowers and fruits

Small, nectar-bearing flowers attract bees, butterflies, and other nectar-feeding insects that pollinate the flowers.

Birds and rodents that eat the fruits aid seed dispersal. Capsules explode to disperse seeds.

Birds such as Crested Guineafowl, Emerald-spotted Wood Dove, Tambourine Dove, francolins, and bulbuls feed on the fruit.

Birds

Produces fruit sought by Crested Guineafowl (Guttera pucherani), Emerald-spotted Wood Dove (Turtur chalcospilos), Tambourine Dove (Turtur tympanistria), various bulbuls, and francolin species; offers occasional shelter or perching.

Insects on the plants are eaten by insectivorous birds such as cuckoos.

By Seeds:

Collect seeds when they turn brown in late summer, just before natural dispersal. Dry in a closed container to induce seed pod opening.

Sow fresh for best germination. Soak seeds in warm water for 24 hours before sowing.

Sow in well-drained seedling mix, cover lightly, and keep moist but not wet; germinates in 3–4 weeks.

Germination rates are moderate to good.

Transplant after seedlings are ~50 mm tall. Initial growth is slow, then increases with age.

By Cuttings:

Not the preferred method; minimal reliable documentation or success reported.

Possible but difficult; use rooting hormone, semi-hardwood cuttings have low success rates.

 

Traditional Uses

 

Historical Uses: Bushman/San people used dried, powdered branches as a perfume and incense; bark is charred/powdered for treating bleeding gums; the plant is also a traditional herbal tea (“Moologa tea” among Tswana). The wood is used for small carvings and utensils.
Medicinal Uses: Used for cough, fever, chest ailments, influenza, diabetes, colds, malaria, oedema, digestive problems, rheumatism, and more; leaves used as a perfume; leaves and bark in infusions, decoctions, smoke, and steams. Aromatic oils are used as an insect repellent.
Toxicity: Generally safe in traditional doses, though the plant is suspected of containing compounds that may be toxic at high concentrations; further research needed for livestock safety, as many of the Euphorbiaceae are highly toxic.
Pharmacological action: Demonstrates antimicrobial, antidiabetic, anti-inflammatory, antiplasmodial, antioxidant, anti-cancer, vasorelaxant, cholinesterase inhibitory, and immune-boosting effects, among others; various parts are documented in pharmacological literature.
Bioactive phytochemicals: Over 55 compounds, including cembrane, trachylobane, pimarane diterpenes, triterpenes, sesquiterpenes, sterols, flavonoids (kaempferol, quercetin derivatives), lupeol, and others.
Livestock & Fodder: Significant as winter fodder in Namibia, though considered a minor component of browsing for wild herbivores; mostly undamaged except for selective browsing by elephants and kudu.
Cultural Significance: Used symbolically in first fruit ceremonies (among Ngwaketsi/Batswana clans), and as an aromatic product by various indigenous groups.

 

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

Link to PlantzAfrica.co.za

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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