Witsering

Names and Synonyms

Common Names

• Common Kirkia
• Kirkia
• White Kirkia
• White-Seringa

Scientific Names

Accepted name

Synonyms

• Kirkia glauca
• Kirkia pubescens
• Kirkia acuminata var. cordata

Regional and Traditional Names

Sources: Wikidata, Catalogue of Life

Taxonomical Classification

This plant belongs to the kingdom Plantae and is classified under the phylum Streptophyta and the class Equisetopsida. Within the subclass Magnoliidae, it is ordered under Sapindales and placed in the family Kirkiaceae. Ultimately, its taxonomic identity is defined by the genus Kirkia, specifically the species Kirkia acuminata.

Sources: The World Checklist of Vascular Plants (WCVP)

Distribution

This plant exhibits a broad geographical presence across several key regions of the African continent. In West-Central Tropical Africa, its distribution includes the Democratic Republic of the Congo. Moving toward East Tropical Africa, the species can be found within the borders of Tanzania. Its reach extends significantly into South Tropical Africa, where it inhabits the nation of Angola. Finally, the plant is also established in the southern regions of Malawi and Mozambique.

Sources: The World Checklist of Vascular Plants (WCVP)

Botanical Identification

Ecology

The ecology of Kirkia acuminata is characterized by its ability to thrive within specific altitudinal gradients across its native habitats. This species occupies a diverse vertical niche, ranging from low-lying areas at an elevation of 245 m AMSL to higher reaches reaching a maximum of 1465 m AMSL. This broad elevational range suggests an adaptability to varying environmental pressures, including fluctuations in temperature, atmospheric pressure, and moisture availability typically encountered between these two altitudes.

Elevational range max:

1465 m AMSL

Elevational range min:

245 m AMSL

Life history

The life history of Kirkia acuminata is characterized by its status as a perennial species, allowing it to persist in its habitat over many growing seasons. As a deciduous plant, it undergoes a seasonal cycle of leaf shedding, typically losing its foliage during unfavorable environmental periods to conserve resources and survive dormancy. This combination of a long-lived perennial lifecycle and a deciduous growth habit enables the plant to adapt to its specific ecological niche through periodic cycles of regrowth and seasonal rest.

Deciduousness :

deciduous

Lifecycle :

perennial

Morphology

The morphology of Kirkia acuminata is characterized by its growth form as a woody tree that functions as a self-supporting structure. It is a terrestrial plant that grows independently, without being a parasite or an epiphyte. In terms of stature, the species exhibits significant height variability, with individual plants typically ranging from a minimum of 3 meters to a maximum of 17 meters, resulting in a mean plant height of approximately 13 meters.

Aquatic :

terrestrial

Climber :

self-supporting

Epiphyte :

terrestrial

Growth form :

tree

Parasite :

independent

Plant height max:

17 m

Plant height mean:

13 m

Plant height min:

3 m

Woodiness :

woody

Physiology

The physiology of Kirkia acuminata is characterized by specific metabolic and nutritional processes adapted to its ecological niche. Regarding its carbon assimilation, the plant utilizes the C3 photosynthetic pathway, a common mechanism in many woody species where CO2 is fixed directly into a three-carbon compound during the Calvin cycle. Furthermore, in terms of nutrient cycling and symbiotic relationships, Kirkia acuminata is not a nitrogen fixer, meaning it does not possess the specialized symbiotic mechanisms required to convert atmospheric nitrogen into biologically available forms through specialized nodules.

Nitrogen fixer :

no

Photosynthetic pathway :

C3

Reproduction

The reproduction of Kirkia acuminata is characterized by specific seed morphological properties that define its dispersal potential and seedling establishment. The species produces seeds with a notable consistency in volume, maintaining a measured seed volume of 110 mm³ throughout its distribution (with both minimum and maximum recorded values at 110 mm³). In terms of mass, the seeds exhibit significant variability, ranging from a minimum of 0.02275 g to a maximum of 0.33333 g. The average seed mass for this plant is calculated at approximately 0.1022475 g, representing the typical investment per individual seed unit during the reproductive cycle.

Seed mass max:

0.33333 g

Seed mass mean:

0.1022475 g

Seed mass min:

0.02275 g

Seed volume max:

110 mm³

Sources: Global Inventory of Floras and Traits (GIFT)

Plant Parts

Kirkia acuminata has 2 reported plant parts identified across 4 scientific publications and several other databases that are studied for medicinal purposes. The most consistently reported plant part include root, stem.

Root

1. Journal of tropical medicine
2. African journal of traditional, complementary, and alternative medicines : AJTCAM

Stem

1. Journal of tropical medicine
2. African journal of traditional, complementary, and alternative medicines : AJTCAM

Chemicals

Kirkia acuminata has 1 reported phytochemicals identified across 4 scientific publications and several other databases. The most consistently reported chemicals include Lignans.

Lignans

1. African journal of traditional, complementary, and alternative medicines : AJTCAM

Activities

Kirkia acuminata has 4 reported activities identified across 4 scientific publications and several other databases. The most consistently reported activities include Antimicrobial, Antibacterial, Anticancer, Antioxidant.

Antimicrobial

1. BMC microbiology
2. Microorganisms

Antibacterial

1. African journal of traditional, complementary, and alternative medicines : AJTCAM

Anticancer

1. BMC microbiology

Antioxidant

1. Microorganisms

Medicinal Uses

Kirkia acuminata has 12 reported medicinal uses identified across 4 scientific publications and several other databases. The most consistently reported uses include cholera, Mycobacterium smegmatis, Staphylococcus aureus, abdominal pains, backache.

Most Reported Uses

Preparations