Acacia decurrens

Names and Synonyms

Scientific Names

Accepted name

Distribution

This plant exhibits a broad geographical distribution across several distinct regions of the African continent. In West-Central Tropical Africa, it can be found within the borders of Cameroon. Its range extends to Northeast Tropical Africa, specifically inhabiting the landscapes of Ethiopia. Moving eastward, the species is also present in East Tropical Africa, notably in Tanzania. Finally, its distribution reaches the southern reaches of the continent, spanning from Angola in South Tropical Africa to the Cape Provinces in Southern Africa.

Sources: The World Checklist of Vascular Plants (WCVP)

Botanical Identification

Ecology

The ecology of Acacia decurrens is characterized by its preference for lowland habitats, where it thrives within specific altitudinal constraints. This species is typically found across an elevational range that begins at 700 m AMSL and extends up to a maximum of 3000 m AMSL. Within these varied elevations, the plant adapts to the environmental conditions of its lowland surroundings, playing a functional role in the local ecosystem through its specific niche requirements.

Elevational range max:

3000 m AMSL

Elevational range min:

700 m AMSL

Habitat :

Lowland

Life history

The life history of Acacia decurrens is characterized by its status as a perennial plant, allowing it to persist through multiple growing seasons. As a phanerophyte, its regenerative buds are located high above the ground on woody stems, a structural adaptation that defines its primary life form. Furthermore, this species maintains an evergreen deciduousness, ensuring that it retains its foliage throughout the year rather than shedding it seasonally.

Deciduousness :

evergreen

Life form :

phanerophyte

Lifecycle :

perennial

Morphology

The morphology of Acacia decurrens is characterized by a woody growth form, primarily existing as a self-supporting tree. It is a terrestrial species that functions as an independent organism, lacking any parasitic or epiphytic tendencies. In terms of stature, the plant typically reaches a height ranging from a minimum of 1.5 m to a maximum of 15 m. As a robust, self-supporting woody tree, it does not exhibit climbing, vine, or liana-like behaviors, maintaining a stable terrestrial habit.

Aquatic :

terrestrial

Climber :

self-supporting

Epiphyte :

terrestrial

Growth form :

tree

Parasite :

independent

Plant height max:

15 m

Plant height min:

1.5 m

Woodiness :

woody

Physiology

The physiology of Acacia decurrens is characterized by its efficient metabolic processes and specialized morphological structures. As a nitrogen fixer, the plant engages in a symbiotic relationship with soil bacteria to convert atmospheric nitrogen into a usable form, significantly enhancing its nutrient uptake and soil enrichment capabilities. Its carbon assimilation is driven by the C3 photosynthetic pathway, a standard mechanism for many woody legumes. Morphologically, the plant's photosynthetic surfaces, specifically its phyllodes, exhibit distinct dimensional variations; the leaf length typically ranges from a minimum of 0.7 cm to a maximum of 2.8 cm, while the leaf width varies between a minimum of 0.5 cm and a maximum of 1.5 cm.

Leaf length max:

2.8 cm

Leaf length min:

0.7 cm

Leaf width max:

1.5 cm

Leaf width min:

0.5 cm

Nitrogen fixer :

yes

Photosynthetic pathway :

C3

Reproduction

The reproduction of Acacia decurrens is characterized by a sexual reproductive cycle, as asexual reproduction is absent. The flowering period typically begins in July and extends through November, though the timing can be variable. Following fertilization, the plant produces fruit in the form of a pod, which is characterized as a dehiscent structure. These pods have an average length of 7 cm and an average width of 0.6 cm. Within these pods, the seeds vary in mass, with a minimum weight of 0.01126 g, a mean mass of 0.020655 g, and a maximum mass reaching 0.1351 g. The dispersal syndrome for this species is classified as unspecialized, indicating a non-specific method for seed distribution.

Dehiscence :

dehiscent

Dispersal syndrome :

unspecialized

Flowering time :

Jul

Flowering time :

Nov

Fruit length mean:

7 cm

Fruit type :

pod

Fruit width mean:

0.6 cm

Reproduction asexual :

absent

Seed mass max:

0.1351 g

Seed mass mean:

0.020655 g

Seed mass min:

0.01126 g

Sources: Global Inventory of Floras and Traits (GIFT)

Chemicals

Acacia decurrens has 30 reported phytochemicals identified across 0 scientific publications and several other databases. The most consistently reported chemicals include (+)-catechin, 3-O-Methyl-L-rhamnose, Aldobionic acid, Anthocyanidin, Ash.

(+)-catechin

1. Dr. Duke

3-O-Methyl-L-rhamnose

1. Dr. Duke

Aldobionic acid

1. Dr. Duke

Anthocyanidin

1. Dr. Duke

Ash

1. Dr. Duke

D-galacturonic acid

1. Dr. Duke

D-glucose

1. Dr. Duke

D-mannose

1. Dr. Duke

FAT

1. Dr. Duke

Gallic acid

1. Dr. Duke

Activities

Acacia decurrens has 223 reported activities identified across 0 scientific publications and several other databases. The most consistently reported activities include 5-HT-Inhibitor, ACE-Inhibitor, Acidulant, Aldehyde-Oxidase-Inhibitor, Aldose-Reductase-Inhibitor.

5-HT-Inhibitor

1. Dr. Duke

ACE-Inhibitor

1. Dr. Duke

Acidulant

1. Dr. Duke

Aldehyde-Oxidase-Inhibitor

1. Dr. Duke

Aldose-Reductase-Inhibitor

1. Dr. Duke

Allelochemic

1. Dr. Duke

Allergenic

1. Dr. Duke

Alpha-Glucosidase-Inhibitor

1. Dr. Duke

Analgesic

1. Dr. Duke

Androgenic?

1. Dr. Duke