Hydnora
Hydnora africana
Hydnora africana is one of the most bizarre and enigmatic parasitic plants on Earth. A member of the family Hydnoraceae within the order Piperales, it is a holoparasitic plant — meaning it is entirely dependent on its host for water and nutrients, lacking chlorophyll and the ability to photosynthesize.
Often called one of the "ugliest" or "most alien" plants in the world, Hydnora africana spends the vast majority of its life hidden underground, attached to the roots of its host plant. Only its fleshy, warty, mushroom-like flower emerges above the soil surface, emitting a foul odor to attract pollinators.
• Holoparasitic — completely lacks chlorophyll and depends entirely on host plants for sustenance
• One of only two genera in the family Hydnoraceae (the other being Prosopanche, found in the Americas)
• Represents one of the most extreme examples of parasitism in the plant kingdom
• Has been described as looking more like a fungus or a creature from science fiction than a typical plant
Taxonomy
• Found in countries including South Africa, Namibia, Botswana, and parts of East Africa
• Typically grows in dry savanna, scrubland, and desert margins
• The genus Hydnora is small, with only a handful of recognized species across Africa and Madagascar
• Hydnoraceae is one of the most phylogenetically isolated families of flowering plants; molecular studies place it within the order Piperales, related to Piperaceae (pepper family) and Aristolochiaceae (birthwort family)
• The family Hydnoraceae has no close living relatives and represents an ancient, highly specialized lineage of parasitic angiosperms
Rhizome & Underground Structure:
• The main body of the plant is a thick, fleshy, underground rhizome (tuber-like structure) that attaches to the roots of host plants (primarily species of Euphorbia, such as Euphorbia mauritanica and Euphorbia gregaria)
• The rhizome is brown to dark brown, irregularly shaped, and can grow quite large (up to several kilograms)
• Lacks true roots and leaves in the conventional sense
• Surface of the rhizome is covered with a thick, corky peridium (outer protective layer)
Flowers:
• The only part of the plant visible above ground
• Fleshy, tubular to subglobose, typically 5–15 cm in diameter
• Brownish-red to pinkish on the outside, with a fleshy interior
• Three (sometimes four) thick, fleshy perianth lobes that open to reveal the interior
• Interior contains a chamber with reproductive structures; the flower functions as a temporary trap for pollinators
• Emits a strong, unpleasant odor (reminiscent of feces or carrion) to attract dung beetles and carrion beetles
• The flower is thermogenic — it can generate its own heat, which helps volatilize the foul-smelling compounds and attract insects
Fruit:
• Develops underground after pollination
• A large, potato-like berry, typically 5–10 cm in diameter
• Fleshy, with a tough outer skin
• Contains numerous small seeds embedded in starchy, edible pulp
• The fruit has a coconut-like or mealy texture and a mildly sweet taste when ripe
Host Plants:
• Obligate root parasite, primarily on species of the genus Euphorbia (family Euphorbiaceae)
• Also reported to parasitize other succulent shrubs in arid environments
• The parasite penetrates host roots using specialized haustoria — structures that tap into the host's vascular system to extract water and nutrients
Pollination:
• Emits a foul, carrion-like odor to attract beetles (particularly dermestid beetles and other carrion/dung beetles)
• The flower interior acts as a temporary trap: insects enter the chamber and are held for a period before being released, dusted with pollen
• Thermogenesis (heat production) within the flower enhances the dispersal of volatile attractant compounds
• This pollination strategy is known as brood-site mimicry or trap pollination
Habitat:
• Arid and semi-arid regions with sandy or rocky soils
• Savanna, Karoo scrubland, and desert margins
• Dependent on the presence of suitable host plants
• Flowering is triggered by rainfall events; the plant may remain dormant underground for extended periods
• Cannot be grown without a living host plant (typically Euphorbia species)
• Requires arid to semi-arid conditions with well-drained, sandy soils
• The plant spends most of its life underground; only the flower emerges briefly above the surface
• Not available in commercial horticulture and has never been successfully cultivated outside its native range
• Any attempt to grow it would require maintaining a healthy host plant and replicating the specific soil, climate, and ecological conditions of southern African arid regions
• Collection from the wild is discouraged and may be illegal in some jurisdictions due to conservation concerns
Fun Fact
Hydnora africana is a master of deception and one of nature's most extreme examples of parasitic adaptation: • It is sometimes called the "jackal food" by local communities, as jackals and other animals dig up the underground fruit to eat • The fruit is edible and has been consumed by indigenous peoples of southern Africa; it is said to have a mealy, slightly sweet taste reminiscent of a potato or coconut • The plant has no leaves, no stems, and no green tissue whatsoever — it is one of the very few flowering plants that has completely abandoned photosynthesis • Its pollination strategy is remarkably sophisticated: the flower not only smells like rotting flesh but also generates its own heat, creating a warm, inviting environment for cold-blooded beetles • The family Hydnoraceae is so unusual that botanists long debated where to place it in the plant kingdom; it was once thought to be related to fungi • A single Hydnora africana plant can remain underground for years, only emerging to flower after sufficient rainfall — making it one of the most elusive plants to observe in the wild • The starchy underground rhizome has been used in traditional tanning processes in some African communities, as it contains high levels of tannins
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