okazi

Names and Synonyms

Common Names

• Eru

Scientific Names

Accepted name

Synonyms

• Thoa africana

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. Within the subclass Gnetidae and the order Gnetales, it is classified under the family Gnetaeceae. Finally, it is identified by the genus Gnetum, specifically as the species Gnetum africanum.

Sources: The World Checklist of Vascular Plants (WCVP)

Distribution

This plant is primarily distributed throughout the West-Central Tropical Africa region. Specifically, its range includes the Central African Republic and Cameroon. It can also be found growing within the borders of Congo and Gabon. Furthermore, the species is widely present in the Democratic Republic of the Congo. These specific locations define its primary natural habitat within the African continent.

Sources: The World Checklist of Vascular Plants (WCVP)

Botanical Identification

Ecology

The ecology of Gnetum africanum is characterized by its specific preference for transitional light environments, typically thriving in the forest fringe and within forest gaps. By occupying these niches, the plant utilizes the increased solar radiation found at the edges of dense vegetation or in areas where the canopy has been breached, allowing it to balance the need for light with the humidity levels provided by the surrounding woodland structure. This positioning within the forest architecture enables it to exploit the dynamic ecological shifts that occur between deep shade and open sunlight, making these disturbed or peripheral zones critical for its growth and survival.

Habitat :

in forest fringe and forest gap

Life history

The life history of Gnetum africanum is characterized by its perennial growth pattern and a complex physiological adaptation to its tropical forest habitat, where its foliage exhibits variable deciduousness, ranging from being strictly evergreen to displaying deciduous tendencies depending on environmental stressors. As a gymnosperm, its life cycle involves the production of specialized reproductive structures that transition from vegetative growth to reproductive maturity, often influenced by seasonal shifts in light availability and moisture. The plant invests significant energy into establishing a robust structural framework, maintaining a persistent canopy that facilitates continuous photosynthetic activity. This varying degree of deciduousness allows the species to balance moisture retention with nutrient cycling, ensuring survival in fluctuating forest microclimates while maintaining its status as a long-lived component of the ecosystem.

Deciduousness :

evergreen

Morphology

The morphology of Gnetum africanum is characterized by its significant stature, reaching an average plant height of approximately 11 m. It is a terrestrial species that exhibits a woody growth habit, functioning as a liana. As a climber, it is classified as an obligatory climber, relying on external structures for support rather than being self-supporting. Furthermore, the plant is an independent organism, meaning it does not function as a parasite, and it maintains a terrestrial existence rather than being an epiphyte.

Aquatic :

terrestrial

Climber :

liana

Climber :

obligatory

Epiphyte :

terrestrial

Parasite :

independent

Plant height mean:

11 m

Woodiness :

woody

Physiology

The physiology of Gnetum africanum is characterized by its unique evolutionary position as a gymnosperm that exhibits advanced vascular structures, including vessels that are more reminiscent of angiosperms than typical conifers. Its metabolic processes are highly adapted to tropical forest environments, focusing on efficient carbon assimilation and nutrient cycling within dense canopy layers. Regarding its nutritional strategy and interaction with soil microbes, the plant does not engage in symbiotic relationships for atmospheric gas conversion; specifically, it is not a nitrogen fixer, meaning it lacks the specialized root nodules or the biological machinery required for the process of nitrogen fixation. Instead, it relies on the uptake of nitrates and ammonium from the soil organic matter to support its physiological development and biomass production.

Nitrogen fixer :

no

Reproduction

The reproduction of Gnetum africanum is characterized by a complex reproductive cycle that relies on cross-pollination, as self-fertilization is notably absent. The flowering phenology of the species is highly flexible, with the flowering period potentially spanning any month of the year, from January through December, or following a variable schedule depending on environmental conditions. Similarly, the fruiting stage exhibits a variable temporal pattern, with the onset and conclusion of fruit development occurring at irregular intervals throughout the year. Because the plant does not practice self-fertilization, successful seed production is contingent upon external pollination vectors to facilitate genetic exchange between individuals.

Flowering time :

Jan

Fruiting time :

variable

Self fertilization :

absent

Sources: Global Inventory of Floras and Traits (GIFT)

Plant Parts

Gnetum africanum 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 leaf.

Leaf

1. Journal of medicinal food
2. Molecules (Basel, Switzerland)

Chemicals

Gnetum africanum has 4 reported phytochemicals identified across 2 scientific publications and several other databases. The most consistently reported chemicals include ATROPINE, Gallic acid, Stilbenes, quercetin.

ATROPINE

1. Food science & nutrition

Gallic acid

1. Medicines (Basel, Switzerland)

Stilbenes

1. Journal of medicinal food

quercetin

1. Medicines (Basel, Switzerland)

Activities

Gnetum africanum has 2 reported activities identified across 2 scientific publications and several other databases. The most consistently reported activities include Antioxidant, Anticholinesterase.

Antioxidant

1. Food science & nutrition
2. Molecules (Basel, Switzerland)

Anticholinesterase

1. Food science & nutrition

Conditions

Gnetum africanum has 2 reported investigations on conditions identified across 2 scientific publications and several other databases. The most consistently reported conditions include Alzheimer's disease, Women's health.

Alzheimer's disease

1. Food science & nutrition

Women's health

1. Economic botany

Preparations

Gnetum africanum has 3 reported preparations identified across 2 scientific publications and several other databases. The most consistently reported preparations include ingredient in soups and stews, leaf extract, vegetable.

Ingredient in soups and stews

1. Journal of medicinal food

Leaf extract

1. Journal of medicinal food

Vegetable

1. Journal of medicinal food