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Group:

Eudicot

Estimated genome size:

0.3 meters in height.

Size:

0.3 meters in height.

Distribution:

Found in grassland habitats across Southern Africa.

PromethION Sequencing Report:

Output:

122.04 Gigabases

Approximate N50:

9.24 kilobases

Draft Genome Assembly Statistics:

Genome Length:

2.75 Gigabases

BUSCO completeness score (single and duplicated genes):

99.6% [S: 60.8%, D: 38.8%]

Importance:

Some populations of this species in the Barberton region of South Africa have evolved the ability to hyperaccumulate nickel, making this species ideal for a comparative genomics approach to understand the evolution of this extreme phenotype.

Sample Contributor contact details:

Prof. Robert Ingle
University of Cape Town

Group:

Eudicot

Estimated genome size:

Size:

12 m (height)

Distribution:

The pepper bark thorn tree is found in woodland, wooded grassland and along riverbanks in South Africa, Eswatini, Zimbabwe, northern and eastern Botswana, northern Namibia and tropical Africa north to Ethiopia.

PromethION Sequencing Report:

Output:

56.59 Gigabases

Approximate N50:

9.28 kilobases

Assembly N50:

16 534 kilobases

Contig number:

912

Draft Genome Assembly Statistics:

Assembler used:

Hifiasm

Genome Length:

1.36 Gigabases

BUSCO completeness score (single and duplicated genes):

99.5% [S: 2.8%, D: 96.7%]

BUSCO database:

viridiplantae

Vachellia sieberiana

Paperbark thorn tree

Species Card Details

Importance:

Widely spread across Africa, this tree is known for its iconic flat-topped canopy, often depicted in films set in Africa. In Central Africa, a bark/root decoction treats urinary inflammation, while leaves, bark, and resin serve as astringents for colds, chest issues, diarrhea, hemorrhages, and eye inflammation. In Tanzania, bark is used for gonorrhea treatment. The edible gum acts as a strong adhesive, and twine from the inner bark is used for threading beads.

Sample Contributor contact details:

Renée Prins
CenGen

Date Published:

2025-08-27

Photo credit:

© K. Campbell

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