In the grasslands of northern KwaZulu-Natal, between the Ngoye Forest and the Lebombo Mountains, a cycad lives a life of deliberate concealment. Encephalartos ngoyanus — the Ngoye dwarf cycad — keeps its stem buried beneath the soil surface, not passively but actively: specialised contractile roots shorten after each growth cycle, physically pulling the caudex deeper into the earth. Only a small crown of dark green fronds — five to ten stiff, erect leaves — breaks the grass line. In the dry season, even these disappear: the species is deciduous, dropping all its leaves before producing new fronds or cones the following season. For months, the plant is invisible — no leaves, no stem, nothing above ground. It might as well not exist.
But it does exist, and it has existed for a very long time. The Ngoye Forest, from which the species takes its name, is one of the most historically significant cycad localities in the world. It was here that Encephalartos woodii — the legendary single-male species, now Extinct in the Wild — was discovered in 1895. It was here, too, that Stangeria eriopus, the only species in its genus, grows wild. And it is here that Encephalartos ngoyanus persists in the grasslands surrounding the forest, a dwarf hidden among the grasses, fireproof by virtue of its underground stem, and reproductively dependent on the very fires that periodically sweep through its habitat. The genus Encephalartos includes giants that tower six metres above the forest floor. Ngoyanus is their antithesis: a cycad that has made itself as close to invisible as a plant can be.
Taxonomy and nomenclature
Encephalartos ngoyanus I. Verd. was first described by Inez Clare Verdoorn in 1949, in Flowering Plants of Africa (volume 27, plates 1053–1054). The syntypes (Verdoorn & Christian 716; 716b — female and male respectively) were collected from Ngoye, Zululand, KwaZulu-Natal, “on grassy slopes near and among boulders.” The syntypes are deposited at PRE (Pretoria).
The epithet ngoyanus refers to the Ngoye Forest — the coastal scarp forest between Mthunzini and Empangeni in KwaZulu-Natal. The forest’s name derives from the isiZulu, and the spelling has varied historically (Ngoye, Ngoya). The type material was collected not within the forest itself but on the grassy slopes near it — ngoyanus is a grassland species, not a forest species, despite its name.
Before Verdoorn’s description, the plants had been confused with Encephalartos caffer — Hutchinson & Rattray (1933) included some ngoyanus specimens under that name. Henderson (1945) referred to them as “Encephalartos sp. aff. E. caffer.” Verdoorn’s 1949 description established ngoyanus as distinct based on a suite of characters: less tuberous root system than caffer, less consistently subterranean stem, leaflets less crowded and not twisted, lower leaflet margins often toothed, and female cone scales with a less pronounced terminal facet.
The species belongs to the group of small, green, subterranean-stemmed cycads of KwaZulu-Natal and adjacent regions, alongside E. caffer (Eastern Cape), E. villosus (widespread), E. cerinus (Tugela Ferry), and E. umbeluziensis (Umbeluzi River). Of these, ngoyanus is most closely related to E. caffer, from which it is geographically separated by several hundred kilometres — caffer in the Eastern Cape (Humansdorp to Willowvale), ngoyanus in northern KwaZulu-Natal to Eswatini.
Common names: Ngoye dwarf cycad (English); isigqiki-somkhovu (isiZulu — shared with other cycads; literally “chair of the zombie,” referring to the belief that a cycad planted at a homestead’s gate protects against witchcraft).
Morphological description
Habit and caudex: Encephalartos ngoyanus is one of the smallest species in the genus — a true grassland dwarf. The stem is entirely subterranean, up to 30 cm long and 20 cm in diameter, with the crown sometimes exposed but more often buried. Plants with up to 5 stems have been recorded, but the typical plant is single-stemmed. Suckering is rare and occurs only when the stem is forced above ground by growing in rocky crevices — the physical exposure of the stem apex apparently triggers offset production, a response absent in soil-buried plants.
The contractile roots deserve special attention. These specialised roots actively shorten after elongation, pulling the caudex downward into the soil. The mechanism is analogous to the contractile roots of bulbous plants (tulips, crocuses) but is unusual in cycads, where most species have normal fibrous or tuberous roots that do not contract. In ngoyanus, the contractile root system is the primary mechanism keeping the stem underground. If a plant is placed on a rock surface — where contraction cannot pull the stem into substrate — the stem remains exposed, and the plant may begin to sucker. This has implications for cultivation: growing ngoyanus in a shallow container on top of an impermeable surface will produce a different growth form than growing it in deep, yielding soil.
Leaves: The fronds are 60–125 cm long, with 5–10 (rarely more) leaves per crown — a sparse canopy. Africa Cycads provides more precise data: leaflets are ribbon-shaped (lorate), 7–10 cm long and 8 mm wide (up to 12 cm × 15 mm in shade), pale to dark green on the upper surface and lighter green beneath. Young leaves are covered with fine white woolly hair that persists on mature leaves on the rachis and lower leaflet surfaces. The leaflets are well-spaced and orderly arranged along the rachis — not crowded or overlapping — giving the leaf an open, airy structure quite different from the congested leaflets of caffer.
Both the petiole (approximately 15 cm long) and the rachis are grey-woolly. The leaflets have entire margins or bear 1–3 teeth on the lower margin — a character that is variable within the species and unreliable as a sole diagnostic feature. Basal leaflets reduce in size but are rarely reduced to prickles — another distinction from some related species. Africa Cycads notes: “the leaves are softer and more flexible than those of E. caffer” — a tactile character that is useful in the field.
PlantZAfrica provides a specific diagnostic for separating ngoyanus from caffer by leaf posture: in ngoyanus, the proximal half of the leaf often curves upward while the distal half is straight; in caffer, the leaves are straight or gradually downward-curving. Additionally, in ngoyanus the upper leaflet surface is soft and glossy and the lower surface feels rougher when stroked; in caffer, both surfaces feel equally smooth.
Deciduous behaviour: The species is often deciduous before producing new leaves or cones — dropping all foliage in late autumn and remaining leafless for weeks or months. This dormancy is a normal adaptation to seasonal drought, not a sign of ill health. On the Highveld, where frost causes leaf loss, the dormancy may be extended. During dormancy, the plant should not be watered — overwatering a leafless ngoyanus is a reliable way to kill it.
Reproductive structures: Cones are solitary, on a short stout peduncle, pale olive-green turning dark yellow to pale brown at maturity (cones growing in shade may remain olive-green). Male cones are subcylindrical, 20–25 cm long and 4.5–6 cm in diameter. The JSTOR description provides precise microsporophyll data: median scales 2.5–2.8 cm long, 2.2–2.5 cm wide, laterally angled, with the bulla face projecting in a subcylindric beak 7–8 mm long. Female cones are pear-shaped, 20–25 cm long and 10–12 cm in diameter, with a 50 mm peduncle completely hidden within the woolly stem apex. Female cones disintegrate in summer (August–October). Seeds are bright red, 29 mm long and 18–20 mm in diameter.
The species has a comparatively slow reproduction rate (Africa Cycads) and does not cone frequently in the wild. This infrequent coning, combined with the fire dependence described below, creates a demographic bottleneck that limits natural population growth.
Distribution and natural habitat
Encephalartos ngoyanus has two discrete distribution areas. The first extends through northern KwaZulu-Natal, from the Ngoye Forest area (Mthunzini/Empangeni) to the surroundings of Mkhuze and Ubombo, and to the Jozini Dam. Verdoorn’s original collection sites span this range: Ngoye, Lower Umfolozi (Mkuzi), Ubombo, and Ingwavuma. The second distribution area lies across the border in Eswatini (Swaziland) and possibly southern Mozambique. The disjunction between these two populations suggests either historical contraction from a once-continuous range or independent colonisation events.
The habitat is rocky grassland slopes and forest margins, often among boulders on steep terrain. The rainfall regime is 750–1000 mm per year, predominantly in summer — a subtropical grassland climate with warm to hot summers and mild to cool winters. The Ngoye Forest association is ecological, not vegetational: ngoyanus grows in the grassland around the forest, not in the forest itself.
Fire ecology — the paradox of dependence and destruction
Fire is central to the ecology of Encephalartos ngoyanus. PlantZAfrica states: “fire plays a very important role in stimulating coning in the plant.” This fire-coning link is well established for several grassland Encephalartos species (cycadifolius, ghellinckii, friderici-guilielmi, lanatus): the heat, smoke, or nutrient flush following a grassland burn triggers the hormonal cascade that initiates cone development. Without fire, many grassland cycads cone infrequently or not at all.
The paradox is that the same fire that stimulates reproduction also destroys it. PlantZAfrica continues: “too frequent fires have become a threat to the cycad.” If the fire-return interval is too short — shorter than the time needed for a cone to develop, mature, and release seeds — then cones are destroyed before they complete their reproductive cycle. The optimal fire regime for ngoyanus is probably a burn every 3–5 years: frequent enough to stimulate coning, infrequent enough to allow seed maturation and seedling establishment between burns.
The subterranean caudex, protected underground by the contractile roots, is fireproof. The leaves burn, but the meristem survives. The next season, the plant pushes up new fronds from its buried crown and resumes photosynthesis. This fire tolerance is the ecological reason for the subterranean habit: in a grassland that burns regularly, staying underground is not a weakness — it is the only viable strategy.
Ecosystem services — nitrogen fixation
Like all cycads, Encephalartos ngoyanus produces coralloid roots containing symbiotic cyanobacteria that fix atmospheric nitrogen. A study from the University of Guam (cited by One Earth) demonstrated that cycads provide an important ecosystem service through nitrogen and carbon sharing via the soil, creating habitable environments for other organisms and maintaining nutrient levels in the soil. In the nutrient-poor grassland soils where ngoyanus grows, this nitrogen contribution may be locally significant — a small, hidden plant providing an outsized service to the soil community around it.
Conservation
Encephalartos ngoyanus is assessed as Vulnerable (VU) on the IUCN Red List. The population is estimated at fewer than 5000 mature individuals, with several subpopulations in decline. Past decline is suspected to exceed 20%, and future decline is projected at over 10% over the next generation (approximately 30 years).
The threats are threefold: illegal collection for private gardens (the plant’s small size and subterranean habit make it easy to dig up and transport), overgrazing of the grassland habitat (which degrades soil structure and exposes plants), and too-frequent veld fires (which destroy developing cones and seedlings before they can establish). The species’ naturally slow reproduction rate and infrequent coning compound the problem: population recovery after losses is measured in decades, not years.
Cold hardiness
The subtropical KwaZulu-Natal habitat is relatively warm, with only light frost in the coldest localities. The species is semi-hardy to frost and will lose its leaves in cold areas (such as the Highveld), entering dormancy until conditions warm.
Practical cold hardiness estimate: USDA Zone 9b–10a (−1 to −4 °C). Leaf loss in frost is normal and not fatal. The subterranean stem benefits from soil thermal inertia — the temperature a few centimetres below ground is significantly more stable and warmer than the air temperature during a frost event. This natural insulation means the caudex can survive temperatures that would kill an exposed aerial trunk.
Caveat: The protection provided by soil thermal inertia applies specifically to the underground stem. The foliage is fully exposed and will be damaged by any frost below approximately −2 °C. A single isolated success in a cold garden does not prove the species can survive identical conditions everywhere — soil type, drainage, mulching, and microclimate all affect the outcome. In wet, heavy soil, a frozen waterlogged caudex will rot; in dry, well-drained sand, the same caudex may survive unscathed.
Cultivation — patience rewarded
Difficulty: 3/5. Grows well in cultivation but is not vigorous and requires understanding of its dormancy cycle. Africa Cycads: “seldom has more than 8 to 10 leaves in a crown” and “is not a vigorous grower.” PlantZAfrica adds that it “grows best in dappled light” — a nuance that distinguishes it from the full-sun preference of many grassland species.
Light: Full sun to dappled light. The wild habitat (grassland among boulders, forest margins) is open but with some shading from rocks and vegetation. PlantZAfrica recommends dappled light; Africa Cycads recommends full sun. The truth is probably intermediate: full sun for cone production, dappled light for best foliage quality.
Soil: Extremely well-drained. The natural habitat on steep, boulder-strewn slopes demands perfect drainage. A mineral-heavy mix of coarse sand, pumice, and minimal organic matter is ideal. The contractile roots need yielding substrate to function — if the soil is too hard or compacted, the roots cannot contract, and the stem may be forced above ground.
Watering: Moderate during the growing season, absolutely none during dormancy. Africa Cycads: “Seedlings are very prone to damping off and should not be over-watered.” When the leaves turn yellow in autumn, stop watering immediately and allow the plant to rest. Resume only when new growth tips emerge from the crown — which may not happen until spring or even early summer.
Deciduous cycle management: This is the critical skill for growing ngoyanus successfully. New growers often panic when the plant drops all its leaves and water it in the hope of reviving it — this is the single most common cause of death in cultivated ngoyanus. The leafless dormancy is normal. Leave the plant alone. It will return.
Growth rate: Slow. The subterranean stem adds very little mass per year. Patience is essential — this is a plant measured in decades, not seasons.
Container culture: Excellent — the small total size (rarely exceeding 1 m above ground) and compact habit make this an ideal container cycad. Use a deep pot (the contractile roots and tap root need vertical space) with extremely free-draining substrate. Terracotta or unglazed clay pots are preferred: they breathe, reducing waterlogging risk during dormancy.
Fire simulation in cultivation: The absence of fire may explain why cultivated ngoyanus cones infrequently. Some specialist growers experiment with potassium-rich fertilisers (sulphate of potash) applied after a simulated dry period, mimicking the mineral flush that fire produces in grassland soils. Results are anecdotal but promising. Controlled burning of leaf litter around the plant is another option for growers with suitable outdoor settings — but obviously impractical for container plants.
Propagation: Seed only — the species does not sucker under normal cultivation conditions. Sow fresh seed on coarse river sand at 24–28 °C with bottom heating. Germination begins in approximately 3 weeks but may take longer without heat. Seedlings at the one-leaf stage are highly susceptible to damping off — maintain excellent air circulation, avoid overwatering, and consider a preventive fungicide drench.
Comparison with Encephalartos caffer
| Character | E. ngoyanus | E. caffer |
|---|---|---|
| Distribution | Northern KwaZulu-Natal + Eswatini (subtropical) | Eastern Cape: Humansdorp to Willowvale (temperate) |
| Stem | Subterranean, 30 × 20 cm, contractile roots | Subterranean, 35–40 × 25 cm |
| Root system | Less tuberous (Verdoorn 1949) | More tuberous |
| Leaf length | 60–125 cm | Up to 120 cm |
| Leaf posture | Proximal half curves upward, distal half straight | Straight or gradually downward-curving |
| Leaflet texture | Soft, flexible, glossy; upper smoother than lower | Leathery, dull green; both sides equally smooth |
| Leaflet arrangement | Well-spaced, orderly, not crowded | Very crowded, especially distally |
| Leaflet margins | Often 1–3 teeth on lower margin | Entire on mature plants |
| Leaf flexibility | Softer, more flexible | Stiffer, more leathery |
| Suckering | Rare (only when forced by rocks) | Occasional |
| Fire response | Fire stimulates coning | Fire-adapted grassland species |
| Deciduous | Often deciduous before coning | Sometimes deciduous |
| Rainfall | 750–1000 mm (subtropical) | Up to 1000 mm (temperate coastal) |
| IUCN status | VU (< 5000 mature plants) | NT |
The Ngoye connection — three cycads, one forest, three fates
The Ngoye Forest and its surrounding grasslands have produced three cycad species, each with a profoundly different conservation trajectory. Encephalartos woodii — the single-male species discovered there in 1895 — is Extinct in the Wild, surviving only as male clones propagated from the original specimen. Stangeria eriopus — the only species in its genus, a fern-like cycad that defied classification for decades — persists in the forest understorey but faces pressure from habitat degradation and the muthi (traditional medicine) trade. And Encephalartos ngoyanus — the grassland dwarf, invisible for most of the year, pulling itself underground by its roots — survives with fewer than 5000 individuals, Vulnerable but not yet critically so.
The three species illustrate three different strategies for living in the same landscape. Woodii grew tall, conspicuous, and exposed in the forest — a strategy that made it visible, collectible, and ultimately doomed. Stangeria hid in the understorey, mimicking a fern so effectively that botanists classified it as a fern for years — a strategy that works against casual collectors but not against determined muthi harvesters. Ngoyanus went underground, became deciduous, and tied its reproduction to fire — a strategy that makes it nearly invisible to humans but dependent on a fire regime that is increasingly disrupted by overgrazing and mismanagement.
Each strategy has its risks. Visibility killed woodii. Dependence on forest structure threatens stangeria. And dependence on fire — at the right frequency, the right intensity, the right season — is the thread on which ngoyanus hangs. If the grasslands burn too often, cones are destroyed before they mature. If they burn too rarely, the species does not cone at all. The Ngoye dwarf cycad needs a Goldilocks fire regime — not too much, not too little — to survive. Whether the fragmented, overgrazed, increasingly managed grasslands of KwaZulu-Natal can provide that regime is the open question that will determine the species’ future.
Authority websites
POWO — Plants of the World Online: https://powo.science.kew.org/…
IUCN Red List: https://www.iucnredlist.org/species/41905/121560297
World List of Cycads: https://cycadlist.org
Bibliography
Verdoorn, I.C. (1949). Encephalartos ngoyanus. Flowering Plants of Africa 27: plates 1053–1054. [Original description]
Dyer, R.A. (1965). The cycads of southern Africa. Bothalia 8: 405–515.
Grobbelaar, N. (2002). Cycads — with Special Reference to the Southern African Species. Privately published, Pretoria.
Whitelock, L.M. (2002). The Cycads. Timber Press, Portland. 374 pp.
Donaldson, J.S. (ed.) (2003). Cycads: Status Survey and Conservation Action Plan. IUCN/SSC Cycad Specialist Group, IUCN, Gland.
Raimondo, D. & Donaldson, J.S. (2003). Responses of cycads with different life histories to the impact of plant collecting. Biological Conservation 111: 345–358.
Haynes, J.L. (2022). Etymological compendium of cycad names. Phytotaxa 550(1): 1–31.