Black Bitterberry

Names and Synonyms

Common Names

• clearing-nut-tree
• Grape Bitterberry
• Grape strychnos

Scientific Names

Accepted name

Synonyms

• Strychnos heterodoxa
• Strychnos tetankotta
• Strychnos stuhlmannii

Regional and Traditional Names

Sources: Wikidata, Catalogue of Life

Taxonomical Classification

This plant belongs to the kingdom Plantae and the phylum Streptophyta, falling under the class Equisetopsida and subclass Magnoliidae. Within the order Gentianales, it is classified under the family Loganiaceae. Finally, it is categorized under the genus Strychnos as the species Strychnos potatorum.

Sources: The World Checklist of Vascular Plants (WCVP)

Distribution

This plant exhibits a diverse geographical distribution across several regions of the African continent. In West-Central Tropical Africa, it can be found inhabiting the landscapes of Burundi, Rwanda, and the Democratic Republic of the Congo. Moving toward the eastern part of the continent, its presence extends into East Tropical Africa, specifically within Tanzania. Additionally, the species reaches into South Tropical Africa, where it is documented in Malawi. Together, these locations highlight the wide range of environments this medicinal species occupies.

Sources: The World Checklist of Vascular Plants (WCVP)

Botanical Identification

Ecology

The ecology of Strychnos potatorum is characterized by its specific distribution within distinct altitudinal gradients, primarily thriving in lowland and mid-elevation tropical environments. This species occupies a defined vertical niche, with its habitat ranging from a minimum elevation of 275 m AMSL to a maximum elevation of 520 m AMSL. This relatively narrow elevational range suggests that the plant is adapted to specific temperature, humidity, and soil moisture regimes typical of these lower montane or lowland forest strata. The environmental conditions within this 245-meter altitudinal band play a critical role in determining its growth patterns, reproductive success, and overall presence within its native ecosystem.

Elevational range max:

520 m AMSL

Elevational range min:

275 m AMSL

Life history

The life history of Strychnos potatorum is characterized by its nature as a perennial plant, ensuring its long-term presence within its ecological niche. As a phanerophyte, it maintains its photosynthetic organs well above the ground, utilizing a structural growth habit that defines its life form. This species exhibits a deciduous nature, shedding its leaves periodically as part of its seasonal biological cycle.

Deciduousness :

deciduous

Life form :

phanerophyte

Lifecycle :

perennial

Morphology

The morphology of Strychnos potatorum is characterized by a woody growth form, manifesting primarily as a tree. This terrestrial plant exhibits a substantial stature, with a plant height that typically ranges from a minimum of 4 meters to a maximum of 10 meters, though it can reach a mean height of approximately 12 meters. In terms of its structural habit, it is categorized as a self-supporting climber, functioning independently without the need for obligatory or facultative host support. As an independent organism, it does not exhibit parasitic behavior and grows as a terrestrial species rather than an epiphyte.

Aquatic :

terrestrial

Climber :

self-supporting

Epiphyte :

terrestrial

Growth form :

tree

Parasite :

independent

Plant height max:

10 m

Plant height mean:

12 m

Plant height min:

4 m

Woodiness :

woody

Physiology

The physiology of Strychnos potatorum is characterized by a standard metabolic profile typical of many woody tropical species. Regarding its carbon assimilation processes, the plant utilizes the C3 photosynthetic pathway, where CO2 is initially fixed into a three-carbon compound during the Calvin cycle. Furthermore, it does not function as a nitrogen fixer, meaning it relies on the uptake of available nitrogen from the soil through its root system rather than engaging in symbiotic nitrogen fixation with diazotrophic bacteria.

Nitrogen fixer :

no

Photosynthetic pathway :

C3

Reproduction

The reproduction of Strychnos potatorum is characterized by the production of fleshy fruits that facilitate a zoochorous dispersal syndrome, specifically utilizing endozoochory for seed distribution. The seeds produced by this species exhibit high morphological consistency, with a uniform seed volume of exactly 870 mm³. In terms of weight, the seeds vary slightly, with a minimum mass of 0.671 g, a maximum mass of 0.81483 g, and a calculated mean seed mass of approximately 0.759956667 g. This combination of fleshy fruit tissue and specific seed dimensions suggests a reproductive strategy highly adapted to animal-mediated dispersal.

Dispersal syndrome :

zoochorous

Dispersal syndrome :

endozoochorous

Fruit dryness :

fleshy

Seed mass max:

0.81483 g

Seed mass mean:

0.759956667 g

Seed mass min:

0.671 g

Seed volume max:

870 mm³

Sources: Global Inventory of Floras and Traits (GIFT)

Plant Parts

Strychnos potatorum has 1 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 seed.

Seed

1. Carbohydrate research
2. Pharmacognosy reviews

Chemicals

Strychnos potatorum has 2 reported phytochemicals identified across 2 scientific publications and several other databases. The most consistently reported chemicals include Galactan, Galactomannan.

Galactan

1. Carbohydrate research

Galactomannan

1. Carbohydrate research

Activities

Strychnos potatorum has 1 reported activities identified across 2 scientific publications and several other databases. The most consistently reported activities include Antihyperglycemic.

Antihyperglycemic

1. Acta poloniae pharmaceutica

Conditions

Strychnos potatorum has 8 reported investigations on conditions identified across 2 scientific publications and several other databases. The most consistently reported conditions include bronchitis, conjunctivitis, diabetes mellitus, dysentery, gonorrhea.

Bronchitis

1. Pharmacognosy reviews

Conjunctivitis

1. Pharmacognosy reviews

Diabetes mellitus

1. Acta poloniae pharmaceutica

Dysentery

1. Pharmacognosy reviews

Gonorrhea

1. Pharmacognosy reviews

Leukorrhea

1. Pharmacognosy reviews

Scleritis

1. Pharmacognosy reviews

Ulcers

1. Pharmacognosy reviews

Preparations

Strychnos potatorum has 1 reported preparations identified across 2 scientific publications and several other databases. The most consistently reported preparations include Methanolic extract.

Methanolic extract

1. BMC complementary medicine and therapies