bushman's-poison

Names and Synonyms

Common Names

• bushman's-poison
• common-poisonbush
• wintersweet
• Buhman' Bush
• Bushman's Arrow Poison
• Bushman's Poison
• Bushman's Poison-Bush
• Bushman's Poisontree
• Bushmans Poison-bush
• Common Poison Bush
• Common Poison-bush
• Hottentots poison bush
• Kaffir Poison Bush
• Poison Plum
• Poison-Arrow Tree
• Poisonbush
• bushman's arrow-poison
• bushmans poison

Scientific Names

Accepted name

Synonyms

• Garcinia sciura
• Toxicophlaea thunbergii
• Carissa oppositifolia
• Toxicophlaea cestroides
• Carissa longiflora
• Pleiocarpa hockii
• Acokanthera venenata
• Cestrum oppositifolium
• Acokanthera rhodesica
• Acokanthera longiflora
• Cestrum fasciculare
• Cestrum venatorium

Regional and Traditional Names

Sources: Wikidata, Catalogue of Life

Taxonomical Classification

This plant belongs to the kingdom Plantae and the phylum Streptophyta, specifically falling under the class Equisetopsida and subclass Magnoliidae. Within the order Gentianales, it is classified under the family Apocynaceae and the genus Acokanthera. Therefore, its complete scientific name identifies it as Acokanthera oppositifolia.

Sources: The World Checklist of Vascular Plants (WCVP)

Distribution

This plant is widely distributed across various regions of the African continent. In West-Central Tropical Africa, it can be found growing within the Democratic Republic of the Congo. Its range extends into East Tropical Africa, where it is present in both Kenya and Tanzania. Moving toward the southern regions, the species is also located in South Tropical Africa. Specifically, this medicinal plant inhabits the landscapes of Malawi and Mozambique.

Sources: The World Checklist of Vascular Plants (WCVP)

Botanical Identification

Ecology

The ecology of Acokanthera oppositifolia is characterized by its ability to inhabit a broad vertical gradient, thriving in diverse topographical settings across its native range. This species demonstrates significant environmental plasticity, occupying a wide elevational range that extends from sea level (0 m AMSL) up to a maximum altitude of 1950 m AMSL. It is typically found in a variety of habitats, including dry bushlands, rocky hillsides, and the margins of more dense woodland or forest ecosystems. Its distribution across these varying altitudes allows it to encounter a spectrum of moisture regimes and temperature fluctuations, enabling it to persist in both lowland scrublands and more temperate montane environments.

Elevational range max:

1950 m AMSL

Elevational range min:

0 m AMSL

Life history

The life history of Acokanthera oppositifolia is characterized by its status as a perennial plant, ensuring its long-term presence within its natural ecosystem. As a phanerophyte, it typically maintains its stem system above the ground, often presenting as a large shrub or small tree, though it can also be classified under the nanophanerophyte life form depending on its specific growth habit and scale. The plant maintains an evergreen deciduousness, retaining its foliage throughout the year rather than shedding it seasonally, which allows for continuous physiological activity.

Deciduousness :

evergreen

Life form :

nanophanerophyte

Life form :

phanerophyte

Lifecycle :

perennial

Morphology

The morphology of Acokanthera oppositifolia is characterized by a woody growth form, primarily manifesting as a shrub. This terrestrial plant exhibits significant variation in stature, with heights ranging from a minimum of 0.6 m to a maximum of 6 m, typically averaging around 5 m. As a self-supporting species, it does not function as a liana or vine, nor does it require external structures for support. It operates as an independent organism, meaning it is not a parasite, and it maintains a terrestrial existence rather than being aquatic, semiaquatic, or epiphytic.

Aquatic :

terrestrial

Climber :

self-supporting

Epiphyte :

terrestrial

Growth form :

shrub

Parasite :

independent

Plant height max:

6 m

Plant height mean:

5 m

Plant height min:

0.6 m

Woodiness :

woody

Physiology

The physiology of Acokanthera oppositifolia is characterized by complex biochemical pathways centered on the production of potent cardiac glycosides, which serve as a primary chemical defense mechanism against herbivory. These secondary metabolites, including oleandrin-like compounds, function by inhibiting the sodium-potassium ATPase pump in cellular membranes, a physiological trait that renders the plant highly toxic. The metabolic processes are optimized for survival in various African habitats, where the plant manages water retention and nutrient uptake through specialized leaf structures and root systems. Regarding its nutrient cycling capabilities, the plant does not possess the physiological mechanisms required for symbiotic nitrogen fixation; therefore, it is not a nitrogen fixer.

Nitrogen fixer :

no

Reproduction

The reproduction of Acokanthera oppositifolia is characterized by the production of seeds that exhibit a highly uniform mass profile. Based on collected data, the seed mass for this species is remarkably consistent, with a mean value of 0.12538 g. This precision is reflected in the maximum and minimum recorded values, which both align exactly at 0.12538 g, indicating a lack of significant variance in the weight of individual seeds within the observed sample. This uniformity in seed mass is a critical component of its reproductive strategy, ensuring a predictable energetic investment per propagule during the dispersal process.

Seed mass mean:

0.12538 g

Sources: Global Inventory of Floras and Traits (GIFT)

Plant Parts

Acokanthera oppositifolia has 2 reported plant parts identified across 2 scientific publications and several other databases that are studied for medicinal purposes. The most consistently reported plant part include leaf, stem.

Leaf

1. The Onderstepoort journal of veterinary research

Stem

1. BMC complementary and alternative medicine

Chemicals

Acokanthera oppositifolia has 2 reported phytochemicals identified across 2 scientific publications and several other databases. The most consistently reported chemicals include Proanthocyanidins, flavonols.

Proanthocyanidins

1. BMC complementary and alternative medicine

flavonols

1. BMC complementary and alternative medicine

Conditions

Acokanthera oppositifolia has 8 reported investigations on conditions identified across 2 scientific publications and several other databases. The most consistently reported conditions include abdominal pains, arthritis, cancer, chronic pain, convulsions.

Abdominal pains

1. BMC complementary and alternative medicine

Arthritis

1. Journal of inflammation research

Cancer

1. Journal of ethnopharmacology

Chronic pain

1. Journal of inflammation research

Convulsions

1. BMC complementary and alternative medicine

Headaches

1. BMC complementary and alternative medicine

Pain

1. Journal of inflammation research

Parasites

1. The Onderstepoort journal of veterinary research

Preparations

Acokanthera oppositifolia has 3 reported preparations identified across 2 scientific publications and several other databases. The most consistently reported preparations include extracts, methanol extracts of the stems, stem extract.

Extracts

1. Journal of ethnopharmacology

Methanol extracts of the stems

1. BMC complementary and alternative medicine

Stem extract

1. BMC complementary and alternative medicine