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Little Monkey Orange

Strychnos usambarensis

Also called Stipe Fruited Bitterbush, Stipe Fruited Strychnos

Little Monkey Orange
Photo: Bart Wursten, CC BY-SA 3.0

Strychnos usambarensis is a shrub, small tree or climbing liane from Sub-Saharan Africa, valued more as a wild species than a garden plant. Treat it as a toxic plant; its root bark and leaves are used to make arrow poison.

Family
Loganiaceae (Logani family)
Grows as
Tree, Shrub
Light
Full sun, Part shade
Water
Water regularly in the growing season and let the top of the soil dry slightly between waterings.
Soil
Free-draining, fertile soil, tolerant of rocky or stony ground.
Temperature
18–30 °C; protect below 10 °C
How easy
Moderate
Safety
Toxic: Root bark and leaves contain toxic alkaloids (related to strychnine) and are used in arrow poisons; handling or ingesting parts can cause serious poisoning.
Native range
Trop. & S. Africa, Madagascar
Climate
seasonally dry tropical

About

Strychnos usambarensis is a shrub or small tree up to 15m tall or a 70m long liane of Sub-Saharan Africa, occurring in forest and woodland, mountain ravines and coastal bush, often on rocky slopes and named for the Usambara Mountains of Tanzania. The species is found from Guinea east to Nigeria, from Congo east to Kenya and south to kloofs of the Magaliesberg of South Africa. Bantu tribes from Rwanda and Tanzania produce an arrow poison from the root bark and leaves of this species, sometimes combining it with extracts from other plants. (see Toxalbumin)

The leaves are opposite, held in a horizontal plane, ovate to elliptic in shape with a characteristic drip tip, and glossy dark green above. Flowers are small, in axillary clusters, whitish to yellowish-green, and fragrant. Fruits are soft-shelled and small, 1-1.5 cm in diameter, yellow when ripe, tapering to a collar at peduncle.

Other Strychnos plants

Strychnos benthamii · Strychnos camptoneura · Strychnos chromatoxylon · Corky Bark Monkey Orange · Strychnos elaeocarpa · Strychnos icaja · St. Ignatius bean · Black monkey orange · Strychnos mellodora · Strychnos millepunctata · Snakewood · Strychnos nux-blanda

Text excerpted from the Wikipedia article Strychnos usambarensis by its contributors, under CC BY-SA 4.0; the excerpts and the care summary drawn from them are shared under the same licence.

The care summary was written by AI (Claude, Anthropic) from the sources on this page, with general growing knowledge where they are silent. Check before relying on it.

Life form, climate and native range: World Checklist of Vascular Plants, Royal Botanic Gardens, Kew (CC BY 3.0), reformatted; see Plants of the World Online.

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