Cape jackalskos

Names and Synonyms

Common Names

• Cape jackalskos
• Milkbush Jackalskos

Scientific Names

Accepted name

Synonyms

• Aphyteia africana
• Hydnora acharii

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 Piperales, it is classified under the family Aristolochiaceae. Finally, its taxonomic identity is defined by the genus Hydnora.

Sources: The World Checklist of Vascular Plants (WCVP)

Distribution

This plant is native to several regions across Southern Africa. Its distribution includes specific areas within the Cape Provinces. It can also be found growing in the arid landscapes of Namibia. Furthermore, the species extends into the KwaZulu-Natal province. Finally, its range reaches across the Free State and the Northern Provinces.

Sources: The World Checklist of Vascular Plants (WCVP)

Botanical Identification

Ecology

The ecology of Hydnora africana is characterized by a highly specialized lifestyle as a holoparasitic plant, existing entirely underground or partially emerging from the soil, which dictates its specific habitat requirements. It thrives across a diverse topographic gradient, occupying environments that span an elevational range from a minimum of 30 m AMSL to a maximum of 915 m AMSL. Because it lacks chlorophyll and relies solely on host plants—typically woody shrubs or vines within the Convolvulaceae family—its distribution is inextricably linked to the presence and health of these hosts. This parasitic relationship influences its niche, as the plant must navigate the rhizosphere to locate suitable root systems. The ecological success of the species is further dependent on specific soil conditions and moisture levels that support both its host plants and the specialized insect pollinators, such as dung beetles, required for its reproductive cycle.

Elevational range max:

915 m AMSL

Elevational range min:

30 m AMSL

Life history

The life history of Hydnora africana is characterized by its status as a perennial organism, following a complex biological cycle that is almost entirely subterranean. Because it lacks chlorophyll and does not possess leaves or true stems, its lifecycle is intimately tied to its parasitic relationship with host roots, typically those of the Santalaceae family. The plant spends much of its existence as a living, underground network of rhizomes and fleshy roots that draw nutrients directly from the host. Periodically, the plant emerges from the soil to produce large, fleshy, odoriferous flowers that rise above the ground to facilitate pollination. These reproductive events are sporadic and highly dependent on the presence of specific pollinators, such as dung beetles, which are attracted by the carrion-like scent of the blooms. Once pollination occurs, the plant produces fleshy fruits that eventually decay or are dispersed, after which the vegetative perennial structure remains dormant underground, waiting for the next cycle of growth and emergence.

Lifecycle :

perennial

Morphology

The morphology of Hydnora africana is characterized by a non-woody, herbaceous growth form that is classified as a non-wooded herb. As a terrestrial organism, it does not exhibit aquatic or semiaquatic tendencies, nor does it function as an epiphyte, remaining strictly terrestrial throughout its life cycle. The plant is a self-supporting, obligate parasite, meaning it relies entirely on a host for survival. In terms of physical dimensions, it is a diminutive species with a plant height ranging from a minimum of 0.07 m to a maximum of 0.11 m.

Aquatic :

terrestrial

Climber :

self-supporting

Epiphyte :

terrestrial

Growth form :

herb

Parasite :

obligatory

Plant height max:

0.11 m

Plant height min:

0.07 m

Woodiness :

non-woody

Physiology

The physiology of Hydnora africana is defined by its extreme specialization as an achlorophyllous, holoparasitic organism, meaning it lacks chlorophyll and is entirely incapable of performing photosynthesis. Because it cannot produce its own energy through light absorption, its metabolic processes are entirely dependent on a host plant, typically members of the Convolvulaceae family, from which it extracts water, minerals, and organic nutrients via a specialized haustorium. This parasitic connection allows the plant to bypass the need for leaf structures, instead utilizing an underground rhizomatous system to navigate the soil and locate host roots. Regarding its nutrient cycling capabilities, Hydnora africana is not a nitrogen fixer; it does not possess the symbiotic relationship with diazotrophic bacteria required to convert atmospheric nitrogen into ammonia, relying instead on the direct translocation of nitrogenous compounds from its host. Its reproductive physiology is similarly specialized, involving the production of large, fleshy, malodorous flowers that utilize thermogenesis or volatile organic compounds to attract carrion-seeking pollinators, ensuring survival in its specific ecological niche through chemical signaling rather than photosynthetic autonomy.

Nitrogen fixer :

no

Reproduction

The reproduction of Hydnora africana is a highly specialized process characterized by a strictly biotic pollination syndrome. Unlike many plants that rely on abiotic factors, this species utilizes a sophisticated biological mechanism to ensure fertilization, specifically targeting certain insect groups. The primary agents involved in this reproductive cycle are beetles, which are drawn to the plant's unique morphological and olfactory cues. This beetle-driven pollination strategy is a specialized form of insect-mediated interaction, where the plant's floral structure provides both a landing platform and a controlled environment for these pollinators. By relying on this biotic interaction, Hydnora africana ensures a targeted transfer of pollen through its specific relationship with beetle populations, distinguishing its reproductive strategy from those that depend on wind or water.

Pollination syndrome :

insect

Pollination syndrome :

beetle

Pollination syndrome :

biotic

Sources: Global Inventory of Floras and Traits (GIFT)

Chemicals

Hydnora africana has 3 reported phytochemicals identified across 0 scientific publications and several other databases. The most consistently reported chemicals include Flavonoids, Proanthocyanidins, Tannins.

Flavonoids

1. Plants (Basel, Switzerland)

Proanthocyanidins

1. Plants (Basel, Switzerland)

Tannins

1. Plants (Basel, Switzerland)

Activities

Hydnora africana has 5 reported activities identified across 0 scientific publications and several other databases. The most consistently reported activities include Antibacterial, Antioxidant, Antidysenteric, Antifungal, Antiproliferative.

Antibacterial

1. Plants (Basel, Switzerland)
2. BMC complementary and alternative medicine

Antioxidant

1. Plants (Basel, Switzerland)
2. BMC complementary and alternative medicine

Antidysenteric

1. BMC complementary and alternative medicine

Antifungal

1. Plants (Basel, Switzerland)

Antiproliferative

1. Plants (Basel, Switzerland)

Medicinal Uses

Hydnora africana has 3 reported medicinal uses identified across 0 scientific publications and several other databases. The most consistently reported uses include antioxidant, cancer, dysentery.

Most Reported Uses