There is a cycad growing in the Durban Botanic Gardens in KwaZulu-Natal, South Africa, that holds a distinction no plant would wish for: it is the last of its kind. Encephalartos woodii is extinct in the wild. Only a single male specimen was ever found — discovered in 1895 on the edge of the oNgoye Forest in Zululand — and every plant of this species in existence today is a clone of that one individual, propagated from offsets over more than a century. There are no females. There has never been a confirmed female. Encephalartos woodii cannot reproduce sexually.
This Encephalartos is, in the most literal sense, the loneliest plant on Earth — a species frozen in time, unable to evolve, unable to produce offspring, unable to do anything except grow, and wait, and hope that somewhere in the unexplored ridges of the oNgoye Forest, a female is still hiding.
The story of discovery — and disappearance
In 1895, John Medley Wood — curator of the Durban Botanic Gardens, founder of the Natal Herbarium, and one of the pioneering botanists of colonial Natal — was shown a remarkable cycad growing on the steep, south-facing slope of a ridge at the edge of the oNgoye Forest, approximately 30 km inland from the Indian Ocean coast near Mtunzini. The plant was a massive, multi-stemmed clump with four trunks of different ages, each bearing a crown of long, gracefully arching fronds with a distinctive dark green colour and a dense, umbrella-shaped silhouette. Wood recognised immediately that it was something unusual — unlike any Encephalartos he had seen before.
Wood collected three basal offsets from the clump and brought them back to the Durban Botanic Gardens, where they were planted and eventually thrived. One offset was sent to the Royal Botanic Gardens, Kew, in 1899 — the beginning of the species’ international diaspora. In 1903, Wood sent his deputy, James Wylie, to collect more material. Wylie removed three smaller offsets and planted them in Durban. He returned in 1907 and this time collected two of the four large trunks themselves — a more aggressive intervention, but one driven by growing concern about the plant’s vulnerability. Wylie noted during this visit that the largest of the remaining two trunks had been badly mutilated, probably by local people harvesting the starchy pith, and he doubted it would survive. He was right: by 1912, only one 3 m trunk remained at the wild site.
In 1916, the Forestry Department, alarmed at the prospect of losing the last wild stem, arranged for it to be removed and transported to the Government Botanist in Pretoria, where it was planted at the National Botanical Garden (now the Pretoria National Botanical Garden). That trunk is believed to have died around 1964.
The original site in the oNgoye Forest has been searched repeatedly since then — by botanists, conservationists, cycad enthusiasts, and in recent years by teams equipped with drones and aerial survey technology. No further specimens of Encephalartos woodii have ever been found. The species is classified as Extinct in the Wild.
Taxonomy and nomenclature
Encephalartos woodii Sander was formally described in 1908 by the nursery firm Sander & Sons of St Albans, England — the same firm that employed the orchid hunter Wilhelm Micholitz, whose cycad collections led to the description of Cycas micholitzii. The description appeared in The Gardeners’ Chronicle, based on material supplied by John Medley Wood. The epithet honours Wood himself — a fitting tribute to the man who both discovered and, inadvertently, presided over the removal of the only known wild population.
Encephalartos woodii is most closely related to Encephalartos natalensis, the large green cycad of the KwaZulu-Natal coast. The two species share a very close genetic relationship, confirmed by molecular studies, and are similar in general size, frond structure, and habit. However, there are consistent morphological differences: Encephalartos woodii has a trunk that broadens markedly toward the base, forming a distinctive buttress; the fronds are more strongly arching, creating a denser umbrella-shaped crown; the leaflets have a subtly different colour tone (olive-green to dark green rather than the pure deep green of natalensis); and the male cones are bright orange to salmon-pink rather than the yellowish-green of natalensis.
The taxonomic status of Encephalartos woodii has been debated. Some authorities have treated it as a robust or aberrant form of Encephalartos natalensis, others as a natural hybrid between Encephalartos natalensis and Encephalartos ferox, and still others as a relict of an ancient species now otherwise extinct. The consensus view, supported by molecular data, is that it is a distinct species — but one whose evolutionary origin and true wild population size will probably never be known.
Common names: Wood’s cycad (English); uMqobampunzi (Zulu).
Morphological description
Habit and caudex: Encephalartos woodii is one of the most imposing species in the genus. The trunk is erect, reaching 3–6 m in height and 30–50 cm in diameter near the crown, broadening to up to 90 cm at the base in the oldest specimens — a unique buttressing character not seen in any other Encephalartos. The 100+-year-old specimens at the Durban Botanic Gardens have trunk circumferences exceeding 2 m and an estimated mass of 2.5 tonnes per trunk. The leaf bases toward the base of the trunk become so compressed by the weight above that the lower trunk surface is unusually smooth — another distinctive feature. Suckering from the base is prolific, and the original wild plant was a multi-stemmed clump. Cultivated specimens readily produce offsets, which is the sole means of propagation.
Leaves: Fronds are 1.5–2.5 m long (some sources report up to 3 m on vigorous specimens), gracefully arching, creating a dense, umbrella-shaped crown even in relatively young plants — a character that distinguishes woodii from the more upright crown of Encephalartos natalensis. Leaflets are broadly lanceolate, often falcate (sickle-shaped), 13–25 cm long and 2–5 cm wide, with a glossy, leathery texture. The colour is a complex dark green with olive to yellow-green undertones, particularly on young fronds — darker and more intense than Encephalartos natalensis. Leaflet margins are smooth or with 1–3 small teeth near the base. The lower leaflets are reduced to spines along the petiole. The crown of a mature Encephalartos woodii in full health is one of the most magnificent sights in the cycad world — a dense canopy of arching, glossy fronds that gives the plant an almost regal bearing.
Reproductive structures: Only male cones are known — the species has never produced female cones because all living plants are clones of a single male individual. Male cones are produced 6–8 at a time on mature plants, cylindrical, 40–90 cm long (occasionally reaching 1.2 m — among the largest cones in the genus), bright orange-yellow to salmon-pink. The cone colour is one of the most striking features: vivid orange against the dark green crown. At Kirstenbosch National Botanical Garden, the resident specimen produces cones every 2–3 years, and the pollen is carefully collected and used in the backcrossing programme with Encephalartos natalensis.
Distribution and natural habitat
The only known wild plants of Encephalartos woodii were the single multi-stemmed clump discovered by Wood in 1895, growing on a steep south-facing slope on the fringes of the oNgoye Forest in Zululand, KwaZulu-Natal, South Africa. The site lies at approximately 200–300 m elevation in subtropical coastal hinterland forest. Annual rainfall at the site ranges from 750–1000 mm, the climate has hot, humid summers and mild winters, and frost is rare. The forest is a rich mosaic of subtropical and tropical tree species — a habitat that Encephalartos natalensis also occupies in the broader region.
Why only one plant was ever found is the great unanswered question of cycad biology. Possibilities include: the species was always extremely rare (a naturally small population reduced to a single individual by stochastic processes over centuries); the population was larger in historical times but was reduced by human activity (pith harvesting, forest clearing, fire) before botanical exploration reached the area; or the species had already passed through a severe population bottleneck from which it never recovered. The oNgoye Forest remains incompletely surveyed — it is dense, rugged, and difficult to access — and the hope that a female plant exists somewhere in its unexplored reaches has never been entirely extinguished.
Where to see Encephalartos woodii
An estimated 500 specimens of Encephalartos woodii exist in cultivation worldwide, all clones of the original oNgoye plant. The species is one of the fastest-growing and most vigorous Encephalartos in cultivation — an ironic ease that contrasts starkly with its desperate conservation status. Notable specimens can be seen at the following institutions:
Durban Botanic Gardens, KwaZulu-Natal, South Africa — the spiritual home of the species. Two of the large trunks collected by James Wylie in 1907 — pieces of the original wild plant — still grow here on the Old Conservatory terrace. These are the oldest cultivated specimens in existence and among the most massive, with trunk circumferences exceeding 2 m. The Durban Botanic Gardens, established in 1851, is the oldest botanic garden in Africa, and these woodii specimens are among its most treasured plants.
Kirstenbosch National Botanical Garden, Cape Town, South Africa — a sucker from one of the Durban plants was sent to Kirstenbosch by James Wylie in 1916. This specimen is now a large, single-trunked plant surrounded by a protective cage installed in the 1980s after repeated theft of offsets. It produces spectacular orange cones every 2–3 years, and its pollen is the primary source for the natalensis × woodii hybridisation programme.
Royal Botanic Gardens, Kew, London, United Kingdom — an offset was sent to Kew in 1899, making it one of the earliest scions of the wild plant to reach Europe. The specimen was grown in the Palm House for nearly a century before being moved to the Temperate House in 1997. It produced its first male cone in September 2004 — over a century after arriving at Kew. This is one of the largest specimens in Europe.
National Botanic Garden of Ireland, Glasnevin, Dublin — a specimen was received in 1905, recorded in the register as costing 1 guinea from Sander & Sons. It is described as “probably the tallest” specimen of Encephalartos woodii in Europe.
Longwood Gardens, near Philadelphia, Pennsylvania, USA — a specimen was received in 1969 after a request from Longwood’s former director, Dr. Russell Seibert, during a plant exploration voyage to South Africa in the 1960s. It is displayed in the Conservatory and produces cones in early winter.
Lotusland, Santa Barbara, California, USA — three specimens were planted in 1979 and are now mature, large plants in the garden’s cycad collection. These are among the most accessible woodii specimens for visitors in North America.
Hortus Botanicus, Amsterdam, Netherlands — a European specimen, part of the historic Amsterdam botanic garden collection.
Orto Botanico di Napoli, Naples, Italy — a specimen has been reported, though its current status is uncertain.
Conservation — resurrecting a species
Encephalartos woodii is listed as Extinct in the Wild (EW) on the IUCN Red List — the most severe category for a species that still exists in cultivation. It is protected under CITES Appendix I and under the highest level of South African national protection. A permit is required to move, purchase, sell, donate, receive, cultivate, or even possess a specimen — and international trade requires specialised CITES permits from both the exporting and importing countries.
The conservation challenge is unique in the plant kingdom. The species cannot reproduce sexually because no female has ever been found. All existing plants are genetically identical male clones propagated vegetatively from the original oNgoye Forest specimen. The genetic diversity of the species is zero. It exists, but it cannot evolve, adapt, or produce offspring. It is in a state of suspended extinction — a living ghost.
Several approaches are being pursued to break this reproductive deadlock:
Searching for a wild female. Repeated surveys of the oNgoye Forest and the surrounding Mtunzini area have been conducted over more than a century, always without success. In recent years, more technologically advanced approaches have been attempted — including drone surveys of the forest canopy, seeking the distinctive crown silhouette of Encephalartos woodii from above. These efforts continue, driven by the tantalising possibility that a female plant exists somewhere in the dense, rugged, incompletely explored forest.
The backcrossing programme with Encephalartos natalensis. This is the most promising avenue. Encephalartos natalensis, the closest living relative, produces both males and females abundantly. By crossing male woodii pollen with female natalensis, the resulting F1 hybrids carry 50 % of the woodii genome. Female F1 hybrids are then backcrossed to woodii males, producing offspring at 75 % woodii. Each subsequent backcross generation raises the proportion further — 87.5 %, 93.75 %, 96.875 % — progressively converging on near-pure Encephalartos woodii, including the critical goal: female plants. Given that each generation requires 15–25 years to reach reproductive maturity, the full programme could span 60–100 years. It is a conservation project measured not in grant cycles but in human lifetimes. Several botanical institutions and private collectors worldwide are currently participating. F1 hybrids have been produced successfully, female F1 plants have been identified, and the first backcrosses are underway. The pollen from the Kirstenbosch specimen is a critical resource for this effort.
Hybridisation with other species. In addition to the natalensis backcrossing programme, woodii pollen has been used to create hybrids with several other Encephalartos species, including Encephalartos transvenosus, Encephalartos horridus, Encephalartos altensteinii, and Encephalartos arenarius. These hybrids are beautiful and vigorous plants in their own right, and they serve the important function of keeping woodii genes in circulation — but they are not substitutes for the pure species.
Sex reversal. In a few documented cases involving other cycad species, spontaneous sex changes have been observed — a male plant producing a female cone, or vice versa. The mechanism is poorly understood, but if it could be induced in an Encephalartos woodii specimen, it would produce the first female reproductive structures in the species’ recorded history. Research into hormonal and environmental triggers for sex reversal in cycads is ongoing, but results to date have been inconclusive.
Cultivation guide
Difficulty: 2/5 — ironically, one of the easiest Encephalartos to grow. The species is described as the fastest-growing and most vigorous Encephalartos in cultivation — a tragic contrast with its conservation status.
Light: Full sun to partial shade. Performs well in both, similar to Encephalartos natalensis. In subtropical gardens, it develops its most impressive crown form in open, sunny positions where the arching fronds can spread fully.
Soil: Well-drained, moderately fertile. Standard Encephalartos mix — loam-based compost with good drainage material. pH 5.5–7.0. Not particularly demanding about substrate.
Watering: Regular. The subtropical coastal oNgoye habitat receives 750–1000 mm annual rainfall with no extreme dry season. Water generously in summer, moderately in winter. More moisture-demanding than the Eastern Cape species but tolerant of seasonal variation.
Cold hardiness: Moderate. The oNgoye Forest habitat is subtropical coastal and rarely experiences frost. In cultivation, reliable in USDA Zone 9b (−1 to −4 °C). Less cold-tolerant than the Eastern Cape montane species (Encephalartos friderici-guilielmi, Encephalartos cycadifolius) or the blue lowland species (Encephalartos horridus, Encephalartos lehmannii). In borderline temperate climates, container culture with frost-free winter storage is the safest approach.
Growth rate: Vigorous for an Encephalartos. Produces a new flush of fronds annually and develops trunk mass relatively quickly. The buttressed trunk base becomes apparent as the plant matures — a unique and visually striking character that distinguishes it from all other cultivated Encephalartos.
Container culture: Good when young. The vigorous growth and eventual massive size (trunk 6 m, crown 4–5 m diameter) mean that container culture is ultimately a temporary arrangement. In suitable climates, ground planting is the long-term goal.
Availability and price: Extremely limited and extremely expensive. Legitimate plants are propagated exclusively from offsets of existing ex situ specimens. A well-established offset with a caudex of 15–20 cm can command prices of €5000–€20 000 or more depending on size and provenance. Large specimens with trunks are essentially priceless and rarely change hands. Any Encephalartos woodii offered at suspiciously low prices is almost certainly misidentified (possibly a natalensis × woodii hybrid), fraudulent, or illegally sourced. Purchase only from reputable specialist nurseries with fully documented provenance and CITES permits. The alternative for collectors who wish to own a piece of the woodii story without the five-figure price tag is to acquire a natalensis × woodii F1 hybrid — these carry 50 % of the woodii genome, are vigorous growers, and are considerably more affordable.
Comparison with Encephalartos natalensis
| Character | Encephalartos woodii | Encephalartos natalensis |
|---|---|---|
| Trunk base | Broadened, buttressed (unique in genus) | Columnar, not buttressed |
| Lower trunk surface | Smooth (compressed leaf bases) | Rough (persistent leaf bases) |
| Crown shape | Dense, umbrella-shaped, strongly arching | Open, spreading, moderately arching |
| Leaflet colour | Dark green with olive/yellow-green undertone | Lustrous dark green, pure |
| Leaflet shape | Often falcate (sickle-shaped) | Broadly lanceolate, straight |
| Male cone colour | Bright orange to salmon-pink | Yellowish-green |
| Cone production | 6–8 cones simultaneously | 1–5 cones per season |
| Suckering | Very prolific | Moderate |
| Growth rate | Fast (fastest in genus) | Moderate to fast |
| IUCN status | Extinct in the Wild | Near Threatened |
| Known wild specimens | One (destroyed/removed 1895–1916) | Thousands |
| Cultivated specimens | ~500 (all male clones) | Thousands (both sexes) |
Why Encephalartos woodii matters
Encephalartos woodii is more than a rare plant. It is a symbol — of what we have lost, of what we are at risk of losing, and of the extraordinary lengths to which human beings will go to preserve a single species. The story of Wood’s cycad has been told in books, documentaries, newspaper articles, and museum exhibitions worldwide. It has inspired artists, poets, and conservation activists. The Kirstenbosch specimen stands behind its protective cage like a prisoner of its own rarity, visited by thousands of people every year who come to see the loneliest plant in the world.
And yet the story is not over. Somewhere in the oNgoye Forest, in an unexplored gully or on an inaccessible cliff face, there may be a female. Or the backcrossing programme — patient, multi-generational, spanning the working lives of botanists not yet born — may eventually produce a female that is 97 % or 99 % woodii, indistinguishable from the original. Either outcome would be, in the full sense of the word, a resurrection.
Authority websites
POWO — Plants of the World Online: https://powo.science.kew.org/…
IUCN Red List: https://www.iucnredlist.org/species/41881/121559647
PlantZAfrica (SANBI): http://pza.sanbi.org/encephalartos-woodii
Durban Botanic Gardens: https://durbanbotanicgardens.org.za
Royal Botanic Gardens, Kew: https://www.kew.org
World List of Cycads: https://cycadlist.org
Bibliography
Sander & Sons (1908). Encephalartos woodii. The Gardeners’ Chronicle, ser. 3, 44: 303. [Original description]
Goode, D. (2001). Cycads of Africa. Struik Publishers, Cape Town. 352 pp.
Jones, D.L. (2002). Cycads of the World. 2nd ed. Smithsonian Institution Press, Washington. 456 pp.
Donaldson, J.S. (ed.) (2003). Cycads: Status Survey and Conservation Action Plan. IUCN/SSC Cycad Specialist Group, IUCN, Gland.
Palmer, E. & Pitman, N. (1972). Trees of Southern Africa. A.A. Balkema, Cape Town.
Giddy, C. (1984). Cycads of South Africa. 2nd revised ed. C. Struik Publishers, Cape Town.
Cousins, S.R. & Witkowski, E.T.F. (2017). African cycads at risk: applying IUCN Red List criteria at the national level. Biodiversity and Conservation 26(8): 1837–1857.
McCracken, D.P. & McCracken, P.A. (1990). The Way to Kirstenbosch. National Botanic Gardens, Cape Town.