Ptaeroxylon obliquum

Names and Synonyms

Scientific Names

Accepted name

Synonyms

• Harrisonia lentiscoides
• Rhus obliqua
• Ptaeroxylon utile
• Ptaeroxylon utile f. robustum
• Kirkia lentiscoides

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 and subclass Magnoliidae. Within the order Sapindales, it is classified under the family Rutaaceae and is identified by the genus Ptaeroxylon.

Sources: The World Checklist of Vascular Plants (WCVP)

Distribution

This plant exhibits a diverse geographical range across several regions of the African continent. In East Tropical Africa, its presence is noted within the borders of Tanzania. Moving toward the southern reaches, it can be found in the South Tropical African nations of Angola and Mozambique. Additionally, the species is distributed throughout Zimbabwe. Finally, its range extends into the Southern African nation of Botswana.

Sources: The World Checklist of Vascular Plants (WCVP)

Botanical Identification

Ecology

The ecology of Ptaeroxylon obliquum is characterized by its ability to thrive across a broad altitudinal gradient, reflecting a versatile adaptability to varying environmental conditions. This species is found distributed within an elevational range that begins at a low altitude of 30 m AMSL and extends up to a maximum elevation of 1370 m AMSL. This significant vertical span suggests that the plant can inhabit diverse ecological niches, ranging from lowland tropical or subtropical environments to higher-altitude montane zones, where it likely encounters varying levels of precipitation, temperature fluctuations, and soil compositions.

Elevational range max:

1370 m AMSL

Elevational range min:

30 m AMSL

Life history

The life history of Ptaeroxylon obliquum is characterized by its status as a perennial species, allowing it to persist in its environment through multiple growing seasons. Throughout its developmental stages, the plant exhibits a deciduous nature, shedding its foliage periodically as part of its seasonal biological cycle.

Deciduousness :

deciduous

Lifecycle :

perennial

Morphology

The morphology of Ptaeroxylon obliquum is characterized by its growth form as a woody tree. It is a self-supporting, independent species that grows in terrestrial environments, rather than being aquatic, an epiphyte, or a parasite. The plant exhibits significant variability in stature, with heights ranging from a minimum of 0.1 m to a maximum of 30 m, maintaining an average height of approximately 15 m.

Aquatic :

terrestrial

Climber :

self-supporting

Epiphyte :

terrestrial

Growth form :

tree

Parasite :

independent

Plant height max:

30 m

Plant height mean:

15 m

Plant height min:

0.1 m

Woodiness :

woody

Physiology

The physiology of Ptaeroxylon obliquum is characterized by a standard C3 photosynthetic pathway, utilizing the Calvin cycle for carbon fixation without the specialized adaptations found in C4 or CAM plants. In terms of its nutrient cycling and metabolic capabilities, the species is not a nitrogen fixer, meaning it lacks the specialized symbiotic relationships with diazotrophic bacteria required to convert atmospheric nitrogen into bioavailable forms.

Nitrogen fixer :

no

Photosynthetic pathway :

C3

Reproduction

Reproduction in Ptaeroxylon obliquum is characterized by a specialized flowering process that relies on cross-pollination rather than internal mechanisms. A key biological trait of this species is that self-fertilization is absent, meaning the plant requires the transfer of pollen from a different individual to achieve successful fertilization and subsequent seed production. This reliance on outcrossing promotes genetic diversity within the population, as the reproductive cycle is dependent on external agents—such as wind or insects—to facilitate the movement of pollen between distinct flowers. Consequently, the absence of self-fertilization ensures that the resulting progeny possess unique genetic combinations, which is a fundamental aspect of its life cycle and evolutionary strategy.

Self fertilization :

absent

Sources: Global Inventory of Floras and Traits (GIFT)

Plant Parts

Ptaeroxylon obliquum has 1 reported plant parts identified across 1 scientific publications and several other databases that are studied for medicinal purposes. The most consistently reported plant part include leaf.

Leaf

1. Journal of ethnopharmacology

Chemicals

Ptaeroxylon obliquum has 3 reported phytochemicals identified across 1 scientific publications and several other databases. The most consistently reported chemicals include Chromones, Coumarins, Lupeol.

Chromones

1. Plants (Basel, Switzerland)

Coumarins

1. Plants (Basel, Switzerland)

Lupeol

1. Journal of ethnopharmacology

Activities

Ptaeroxylon obliquum has 6 reported activities identified across 1 scientific publications and several other databases. The most consistently reported activities include Antifungal, Anthelmintic, Antibacterial, Antiparasitic, Antiproliferative.

Antifungal

1. Journal of ethnopharmacology
2. Plants (Basel, Switzerland)

Anthelmintic

1. Journal of ethnopharmacology

Antibacterial

1. Plants (Basel, Switzerland)

Antiparasitic

1. Plants (Basel, Switzerland)

Antiproliferative

1. Plants (Basel, Switzerland)

Cytotoxic

1. Journal of ethnopharmacology

Medicinal Uses

Ptaeroxylon obliquum has 7 reported medicinal uses identified across 1 scientific publications and several other databases. The most consistently reported uses include anaplasmosis, babesiosis, ehrlichiosis, inflammation, rheumatoid arthritis.

Most Reported Uses

Preparations