Acokanthera oblongifolia ex

Names and Synonyms

Common Names

• African wintersweet
• Hottentot's-poison
• dune-poisonbush
• poison-arrow-plant
• wintersweet

Scientific Names

Accepted name

Synonyms

• Acokanthera spectabilis
• Jasminonerium oblongifolium
• Carissa oblongifolia
• Carissa spectabilis
• Acokanthera venenata var. spectabilis
• Toxicophlaea spectabilis

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 Gentianaales, it is classified under the family Apocynaceae. Finally, it is identified by its specific genus, Acokanthera.

Sources: The World Checklist of Vascular Plants (WCVP)

Distribution

This plant exhibits a specific geographical distribution concentrated within certain regions of the African continent. It can be found in South Tropical Africa, specifically within the borders of Mozambique. Furthermore, its presence extends into the Southern Africa region, including the Cape Provinces. The species is also widely distributed throughout the KwaZulu-Natal area of Southern Africa. These distinct locations define the natural habitat where this medicinal plant thrives.

Sources: The World Checklist of Vascular Plants (WCVP)

Botanical Identification

Ecology

The ecology of Acokanthera oblongifolia is characterized by its adaptability to diverse topographical gradients, spanning a significant altitudinal range from sea level up to a maximum elevation of 950 m AMSL. This distribution allows the species to inhabit various ecological niches, ranging from coastal lowlands to mid-altitude montane environments. As a component of its habitat, the plant typically thrives in specific soil compositions and moisture regimes found within these elevational belts, often integrating into the structural complexity of forest edges, thickets, or woodland ecosystems. Its ability to persist across this 950-meter vertical range suggests a resilience to varying temperature regimes and atmospheric pressures associated with changing altitudes.

Elevational range max:

950 m AMSL

Elevational range min:

0 m AMSL

Life history

The life history of Acokanthera oblongifolia is characterized by its existence as a perennial plant, ensuring its presence in the ecosystem over multiple growing seasons. Structurally, it exhibits complex life form classifications, functioning as a phanerophyte due to its woody growth habit where buds are elevated above the ground, while also being categorized as a nanophanerophyte, indicating its tendency to maintain relatively small woody structures. Throughout its life cycle, the species maintains an evergreen deciduousness, retaining its foliage year-round rather than shedding it seasonally.

Deciduousness :

evergreen

Life form :

nanophanerophyte

Life form :

phanerophyte

Lifecycle :

perennial

Morphology

The morphology of Acokanthera oblongifolia is characterized by a woody growth form that can manifest as either a shrub or a tree. This terrestrial species is non-aquatic and does not function as an epiphyte, nor does it act as a parasite, maintaining an independent lifestyle. In terms of stature, the plant is self-supporting rather than being a climber, with its height varying significantly based on environmental conditions. Specifically, the plant height ranges from a minimum of 1.79 m to a maximum of 6 m, with an average height of approximately 5 m.

Aquatic :

terrestrial

Climber :

self-supporting

Epiphyte :

terrestrial

Growth form :

tree

Growth form :

shrub

Parasite :

independent

Plant height max:

6 m

Plant height mean:

5 m

Plant height min:

1.79 m

Woodiness :

woody

Physiology

The physiology of Acokanthera oblongifolia is characterized by specialized metabolic pathways focused on the synthesis and sequestration of highly toxic cardiac glycosides, primarily aimed at herbivore defense. These secondary metabolites, such as ouabain, function by inhibiting the sodium-potassium ATPase pump within cellular membranes, disrupting essential electrochemical gradients. The plant's metabolic processes are geared toward the continuous production and storage of these compounds within its tissues to maintain high toxicity levels. Regarding its nutrient acquisition and symbiotic relationships, Acokanthera oblongifolia does not engage in biological nitrogen fixation; therefore, it is not a nitrogen fixer. Consequently, the plant must rely on the uptake of mineralized nitrogen, such as nitrates and ammonium, directly from the soil through its root system to support its protein synthesis and overall vegetative growth.

Nitrogen fixer :

no

Reproduction

Reproduction in Acokanthera oblongifolia is facilitated through the production of seeds that are characterized by an extremely lightweight profile. The seeds exhibit a highly uniform mass, with a recorded mean seed mass of 0.001 g. This consistency is reflected in the specific mass range of the species, as both the maximum and minimum recorded seed mass values are precisely 0.001 g. This minimal seed mass suggests a reproductive strategy potentially involving efficient dispersal mechanisms suited to such minute biological units.

Seed mass mean:

0.001 g

Sources: Global Inventory of Floras and Traits (GIFT)

Plant Parts

Acokanthera oblongifolia has 1 reported plant parts identified across 2 scientific publications and several other databases that are studied for medicinal purposes. The most consistently reported plant part include leaf.

Leaf

1. Planta medica
2. Zeitschrift fur Naturforschung. C, Journal of biosciences

Chemicals

Acokanthera oblongifolia has 4 reported phytochemicals identified across 2 scientific publications and several other databases. The most consistently reported chemicals include Acobioside a, Acospectoside A, Acovenoside A, Cardenolides.

Acobioside a

1. Zeitschrift fur Naturforschung. C, Journal of biosciences

Acospectoside A

1. Planta medica

Acovenoside A

1. Zeitschrift fur Naturforschung. C, Journal of biosciences

Cardenolides

1. Zeitschrift fur Naturforschung. C, Journal of biosciences

Activities

Acokanthera oblongifolia has 5 reported activities identified across 2 scientific publications and several other databases. The most consistently reported activities include Antiangiogenic, Anticancer, Antioxidant, Antiproliferative, Cytotoxic.

Antiangiogenic

1. Zeitschrift fur Naturforschung. C, Journal of biosciences

Anticancer

1. Zeitschrift fur Naturforschung. C, Journal of biosciences

Antioxidant

1. Zeitschrift fur Naturforschung. C, Journal of biosciences

Antiproliferative

1. Zeitschrift fur Naturforschung. C, Journal of biosciences

Cytotoxic

1. Planta medica

Medicinal Uses

Acokanthera oblongifolia has 1 reported medicinal uses identified across 2 scientific publications and several other databases. The most consistently reported uses include cancer.

Most Reported Uses

Preparations