small knobwood

Names and Synonyms

Scientific Names

Accepted name

Synonyms

• Amyris armata
• Fagara capensis
• Zanthoxylum thunbergii
• Fagara armata
• Fagara multifoliata
• Elaphrium capense
• Fagarastrum thunbergii
• Fagara megalismontana
• Fagarastrum capense
• Amyris capensis

Sources: Wikidata, Catalogue of Life

Taxonomical Classification

This plant belongs to the kingdom Plantae within the phylum Streptophyta and the class Equisetopsida. It is further classified under the subclass Magnoliidae and the order Sapindales. Finally, it is a member of the family Rutaceae and falls under the genus Zanthoxylum.

Sources: The World Checklist of Vascular Plants (WCVP)

Distribution

This plant exhibits a diverse geographical distribution across several regions of the African continent. Within South Tropical Africa, it can be found growing in both Mozambique and Zimbabwe. Moving into the Southern African region, its presence is well-documented in the Cape Provinces. It is also widely distributed throughout the KwaZulu-Natal area. Finally, the species extends its range into the Free State province.

Sources: The World Checklist of Vascular Plants (WCVP)

Botanical Identification

Ecology

The ecology of Xanthoxylum capense is characterized by its ability to thrive across a broad altitudinal gradient, demonstrating significant ecological plasticity. This species can be found inhabiting diverse landscapes ranging from low-lying areas starting at an elevation of 5 m AMSL to much higher montane environments reaching up to a maximum of 2000 m AMSL. This wide elevational range suggests that the plant is adapted to a variety of climatic conditions, including different temperature regimes and moisture availability levels found across these varying heights. Such a distribution allows it to occupy diverse ecological niches within its native habitats, from coastal or lowland plains to more temperate mid-to-high altitude zones.

Elevational range max:

2000 m AMSL

Elevational range min:

5 m AMSL

Life history

The life history of Xanthoxylum capense is characterized by its status as a perennial species, allowing it to persist in its environment over many years rather than completing its cycle in a single season. As a long-lived woody plant, it undergoes a continuous process of growth, development, and seasonal maintenance, establishing a robust structural presence in its native habitat. This perennial nature enables the plant to invest significant energy into complex root systems and woody tissues, facilitating survival through varying environmental conditions and providing a stable foundation for repeated reproductive cycles throughout its lifespan.

Lifecycle :

perennial

Morphology

The morphology of Xanthoxylum capense is characterized by a woody growth form that manifests primarily as a tree or a shrub. As a self-supporting plant, it does not function as a climber, liana, or vine, and it maintains an independent status rather than acting as a parasite or an epiphyte. The species is terrestrial in its habitat, occupying non-aquatic or semiaquatic environments. In terms of stature, the plant exhibits significant vertical development, with a height ranging from a minimum of 4 meters to a maximum of 10 meters.

Aquatic :

terrestrial

Climber :

self-supporting

Epiphyte :

terrestrial

Growth form :

tree

Growth form :

shrub

Parasite :

independent

Plant height max:

10 m

Plant height min:

4 m

Woodiness :

woody

Physiology

The physiology of Xanthoxylum capense is fundamentally characterized by its reliance on the C3 photosynthetic pathway, a metabolic process where carbon dioxide is fixed directly into a three-carbon compound during the Calvin cycle. This pathway indicates that the plant lacks the specialized carbon-concentrating mechanisms found in C4 or CAM species, meaning its physiological efficiency is highly dependent on maintaining optimal stomatal conductance to balance CO2 uptake with transpirational water loss. Within its leaf tissues, the enzyme RuBisCO facilitates the carboxylation of ribulose-1,5-bisphosphate, driving the synthesis of organic compounds necessary for growth and the production of secondary metabolites. This metabolic framework dictates the plant's environmental adaptations, particularly its sensitivity to photorespiration under high temperatures and intense light intensity, which influences its overall energy budget and water-use efficiency in its natural habitat.

Photosynthetic pathway :

C3

Reproduction

The reproduction of Xanthoxylum capense involves the production of seeds that exhibit a highly consistent morphology regarding their physical dimensions. Based on available data, the seed mass of this species is characterized by extreme uniformity, with a mean seed mass of 0.02523 g. This consistency is reflected in the recorded minimum and maximum values, which both strictly equal 0.02523 g, indicating no observed variance in seed weight within the studied sample. This precise measurement suggests a stabilized reproductive output in terms of individual seed mass, which is a critical factor in the plant's dispersal and establishment strategies.

Seed mass mean:

0.02523 g

Sources: Global Inventory of Floras and Traits (GIFT)

Plant Parts

Zanthoxylum capense has 4 reported plant parts identified across 22 scientific publications and several other databases that are studied for medicinal purposes. The most consistently reported plant part include fruit, leaf, seed, root.

Fruit

1. PloS one
2. Ancient science of life
3. Food science & nutrition
4. Molecules (Basel, Switzerland)
5. TheScientificWorldJournal

Leaf

1. Ancient science of life
2. Molecules (Basel, Switzerland)
3. The plant genome
4. Journal of environmental management
5. Evidence-based complementary and alternative medicine : eCAM

Seed

1. TheScientificWorldJournal
2. Natural product research
3. Journal of environmental management
4. Journal of tropical medicine

Root

1. Heliyon
2. Phytomedicine : international journal of phytotherapy and phytopharmacology

Chemicals

Zanthoxylum capense has 60 reported phytochemicals identified across 22 scientific publications and several other databases. The most consistently reported chemicals include Flavonoids, Terpenoids, Phenols, Sterols, Tambulin.

Flavonoids

1. Pakistan journal of pharmaceutical sciences
2. Food science & nutrition
3. TheScientificWorldJournal
4. Journal of ethnopharmacology
5. Natural product research

Terpenoids

1. Journal of ethnopharmacology
2. The plant genome
3. Natural product research
4. NPJ science of food

Phenols

1. Pakistan journal of pharmaceutical sciences
2. Food science & nutrition
3. TheScientificWorldJournal

Sterols

1. Pakistan journal of pharmaceutical sciences
2. Journal of ethnopharmacology
3. Natural product research

Tambulin

1. Biomedicine & pharmacotherapy = Biomedecine & pharmacotherapie
2. Journal of ethnopharmacology
3. Experimental gerontology

Coumarins

1. Journal of ethnopharmacology
2. Natural product research

LIMONENE

1. Natural product research
2. Journal of oleo science

Lignans

1. Natural product research
2. Phytomedicine : international journal of phytotherapy and phytopharmacology

Linalool

1. Molecules (Basel, Switzerland)
2. Natural product research

Monoterpenes

1. Nutrients
2. Mini reviews in medicinal chemistry

Activities

Zanthoxylum capense has 20 reported activities identified across 22 scientific publications and several other databases. The most consistently reported activities include Antimicrobial, Antioxidant, Antibacterial, Antifungal, Cytotoxic.

Antimicrobial

1. Biomedicine & pharmacotherapy = Biomedecine & pharmacotherapie
2. BMC complementary and alternative medicine
3. Mini reviews in medicinal chemistry
4. Journal of ethnopharmacology

Antioxidant

1. Biomedicine & pharmacotherapy = Biomedecine & pharmacotherapie
2. TheScientificWorldJournal
3. Journal of ethnopharmacology
4. Pakistan journal of pharmaceutical sciences

Antibacterial

1. Biomedicine & pharmacotherapy = Biomedecine & pharmacotherapie
2. Mini reviews in medicinal chemistry
3. Pakistan journal of pharmaceutical sciences

Antifungal

1. Mini reviews in medicinal chemistry
2. Pakistan journal of pharmaceutical sciences
3. Pharmaceutical biology

Cytotoxic

1. BMC complementary and alternative medicine
2. Journal of ethnopharmacology

Stomachic

1. Journal of ethnopharmacology
2. Natural product research

Anthelmintic

1. Journal of ethnopharmacology

Anticancer

1. BMC complementary and alternative medicine

Antidiabetic

1. BMC complementary and alternative medicine

Antifertility

1. Recent advances in food, nutrition & agriculture

Conditions

Zanthoxylum capense has 11 reported investigations on conditions identified across 22 scientific publications and several other databases. The most consistently reported conditions include Aspergillus fumigatus, MRSA, Mycobacterium tuberculosis, Staphylococcus aureus, arthritis.

Aspergillus fumigatus

1. BMC complementary and alternative medicine

Mrsa

1. Phytomedicine : international journal of phytotherapy and phytopharmacology

Mycobacterium tuberculosis

1. Evidence-based complementary and alternative medicine : eCAM

Staphylococcus aureus

1. Phytomedicine : international journal of phytotherapy and phytopharmacology

Arthritis

1. BMC complementary and alternative medicine

Colon cancer

1. Phytomedicine : international journal of phytotherapy and phytopharmacology

Inflammation

1. BMC complementary and alternative medicine

Neurological disorders

1. BMC complementary and alternative medicine

Pain

1. BMC complementary and alternative medicine

Rhinitis

1. African health sciences

Preparations

Zanthoxylum capense has 39 reported preparations identified across 22 scientific publications and several other databases. The most consistently reported preparations include Crude alkaloids from leaves, Crude methanol extracts of bark, Crude methanol extracts of fruits, Crude methanol extracts of seeds, EOs.

Crude alkaloids from leaves

1. Heliyon

Crude methanol extracts of bark

1. Journal of tropical medicine

Crude methanol extracts of fruits

1. Journal of tropical medicine

Crude methanol extracts of seeds

1. Journal of tropical medicine

Eos

1. Molecules (Basel, Switzerland)

Extract from fruit

1. Heliyon

Extract from leaves

1. Heliyon

Hexane and ethyl acetate fraction

1. Biomedicine & pharmacotherapy = Biomedecine & pharmacotherapie

Za.cr

1. Phytotherapy research : PTR

Bark extracts

1. Heliyon