Yucca lacandonica Gómez Pompa & J. Valdés is the most improbable yucca in existence. While every other species in the genus grows rooted in soil — in deserts, prairies, chaparral, scrubland and dry woodland — Yucca lacandonica lives in the canopy of tropical rainforest, 20–25 metres above the ground, perched on the branches of enormous trees. It is the only epiphytic species in the entire genus Yucca. Discovered in the legendary Selva Lacandona (Lacandon Rainforest) of Chiapas, Mexico, and described in 1962, it is also one of the rarest and most poorly known yuccas: a plant of mature, wet, lowland tropical forest in a region undergoing catastrophic deforestation. The IUCN lists it as Endangered. It has no subspecies and no synonyms. It is, in short, a biological unicorn — a member of a quintessentially arid-adapted genus that has somehow colonised the most humid environment in Mesoamerica.
This page covers the taxonomy, morphology, ecology, cultivation and conservation of Yucca lacandonica, and can be read alongside the hub page on the genus Yucca and the broader agavoids guide.
Taxonomy and nomenclature
Yucca lacandonica was described by Arturo Gómez-Pompa and J. Valdés in 1962, in a paper published in the Boletín de la Sociedad Botánica de México (vol. 27: 43–46) under the title “Una especie epífita de Yucca de la selva Lacandona” — “An epiphytic species of Yucca from the Lacandon Rainforest.” The description was based on material from the Selva Lacandona in eastern Chiapas, Mexico, although earlier collections had been made in Belize by the botanical explorer William Schipp as early as 1935.
The specific epithet lacandonica is a geographical reference to the Selva Lacandona (Lacandon Rainforest), itself named after the Lacandón Maya, the indigenous people who have inhabited this region of eastern Chiapas for centuries. The Lacandón are one of the last groups of Maya to have maintained a largely traditional, forest-based way of life into the modern era.
The species belongs to the family Asparagaceae, subfamily Agavoideae, genus Yucca. Within the genus, its placement in the subgenus Yucca (the fleshy-fruited yuccas) is indicated by its juicy, indehiscent fruit. No synonyms have been recorded for this species. It is also known by the common names Tropical Yucca, Epiphytic Yucca, and Quim (a local Mayan name).
| Family | Asparagaceae |
| Subfamily | Agavoideae |
| Genus | Yucca L. |
| Subgenus | Yucca (fleshy-fruited) |
| Species | Yucca lacandonica Gómez Pompa & J. Valdés (1962) |
| Synonyms | None |
POWO (Kew) and World Flora Online both accept Yucca lacandonica as a valid species. POWO describes its native range as southern Mexico and classifies it as an epiphytic shrub growing primarily in the seasonally dry tropical biome.
Morphology
Yucca lacandonica is a caulescent, branching, epiphytic shrub — an entirely unique growth form within the genus. The trunk can reach up to 3 m in length and 25 cm in diameter at the base. Unlike arborescent yuccas such as Yucca filifera or Yucca brevifolia, whose trunks grow vertically, the stems of Yucca lacandonica are partially horizontal, curving and bending under their own weight as they grow along tree branches high in the canopy. Multiple horizontal or ascending trunks typically branch from a thickened base, often gnarled and twisted — rarely growing upright for more than a metre before bending. The overall effect is of a massive, sprawling epiphyte, with individual rosette crowns measuring approximately 1.5–2 m in diameter. Entire colonies in the canopy can be far more extensive.
The leaves are 35–85 cm long and 3–7 cm wide, narrowly lanceolate, tapering at both ends (narrowing near the base as well as toward the apex — unusual in the genus, where most species have leaves widest at the base). They are somewhat fleshy to thin, with a finely acute apex and denticulate margins bearing a narrow yellowish band approximately 0.5 mm wide.
The inflorescence is a pyramidal panicle, 40–100 cm long, short-pedunculate (with a short stalk). The flowers are campanulate (bell-shaped), white to whitish, with oblong-linear tepals 4.5–7 cm long and approximately 0.8 cm wide or more, free from the base, narrowing to a long point at the tip. The filaments are approximately 7 mm long. The ovary is oblong, 1–1.5 cm long and 0.4–0.6 cm wide.
The fruit is juicy (fleshy), elongated, up to 10 cm long — confirming placement in the subgenus Yucca (the baccate, fleshy-fruited yuccas) alongside species such as Yucca baccata, Yucca schidigera and Yucca torreyi. The capsule-type classification given by some databases (e.g. Encyclopedia of Life) may reflect uncertainty or variation in fruit interpretation, but the original description and most treatments emphasise the fleshy, berry-like character of the fruit.
The epiphytic habit: why it matters
The epiphytic habit of Yucca lacandonica is extraordinary in the context of the genus. Every other yucca species — all fifty or so — is terrestrial. The genus is overwhelmingly associated with arid and semi-arid environments: deserts, prairies, dry woodland, chaparral, rocky hillsides. For a genus defined by xerophytic adaptation to colonise the canopy of tropical rainforest is a remarkable evolutionary leap.
Epiphytism in Yucca lacandonica is not a marginal or occasional phenomenon. The species typically grows on tree branches 20–25 m above the ground, in the canopy of mature, tall tropical forest. It has been reported to grow terrestrially as well — notably on cliff faces and rocky substrates — but the primary habitat is unambiguously epiphytic.
How this transition from terrestrial to epiphytic life occurred is unknown. The canopy environment — high light, intermittent moisture from rainfall and humidity, minimal soil, good air circulation — shares some functional similarities with the rocky, well-drained, sun-exposed habitats of terrestrial yuccas. The plant’s fleshy leaves and robust caudex-like trunk base may provide the water storage necessary to survive periods between rainfall events in the canopy. The denticulate leaf margins (rather than the filiferous margins of many desert yuccas) and the narrowed leaf base may represent adaptations to the different mechanical and hydrological demands of the epiphytic niche.
The question of how Yucca lacandonica is pollinated in the rainforest canopy is unanswered. All other yuccas depend on obligate yucca moths (Tegeticula spp.) for pollination, but it is unknown whether yucca moths are present in the tropical rainforest canopy at the required altitude. The plant’s fleshy fruit suggests successful pollination and seed production, but the pollination mechanism in the wild has not been documented.
Distribution and habitat
Yucca lacandonica is native to southern Mexico (the states of Chiapas, Veracruz, Tabasco, Quintana Roo, Campeche and Yucatán), Belize (the Bladen Forest Reserve and surroundings in the Toledo District) and Guatemala (a more recent record, first published by Hochstätter in 2015 in Cactus-Aventures International). The species appears to be localised within lowland wet tropical forest, generally below 500 m elevation in Mexico and Guatemala, and possibly up to 1,000 m in some treatments.
The species inhabits mature, tall-canopy tropical rainforest — a habitat that is under extreme pressure across its entire range. It is conspicuous as a canopy or cliff-dwelling plant where it occurs, but appears to be genuinely rare and patchily distributed.
Known protected populations include those in the Reserva de la Biósfera Montes Azules (Montes Azules Biosphere Reserve) in eastern Chiapas, Mexico, and the Bladen Nature Reserve (formerly Bladen Forest Reserve) in the Toledo District of Belize. The species is not currently known to occur in any protected areas in Guatemala.
Cultivation
Yucca lacandonica is extremely rare in cultivation. It is occasionally available from specialist seed suppliers (notably rarepalmseeds.com) and has been grown by a small number of specialist collectors, but it remains virtually unknown in mainstream horticulture.
Climate requirements
This is a tropical species that was long assumed to be strictly frost-tender. It requires warm temperatures, high humidity and — in principle — protection from freezing conditions. It would be expected to grow best in the warmest, most humid parts of southern Florida, tropical greenhouses, and frost-free corners of southern California (where it could potentially be grown as a large hanging-basket or mounted epiphyte). In tropical climates (USDA zones 10b–12), it can be grown outdoors as an epiphyte on large trees or on rocky substrates.
However, recent field experience is revising this assumption. At the Jardin zoologique tropical in La Londe-les-Maures (Var, France — Mediterranean coast), a specimen of Yucca lacandonica planted under the canopy of mature trees survived –2 °C in January 2026 without damage. This is a remarkable result for a species whose entire natural range lies in lowland tropical rainforest. It echoes the pattern observed with Yucca gigantea (= Yucca elephantipes), another tropical, fleshy-fruited yucca whose cold tolerance proved far greater than its equatorial origins suggested: Yucca gigantea survives –5 to –7 °C with no or light damage, despite being native to Central American tropical forests. It is possible that Yucca lacandonica possesses a similar, underestimated cold tolerance — perhaps linked to the physiological robustness required to endure the harsh, desiccating conditions of the upper rainforest canopy (intense sun exposure, strong wind, intermittent drought between rainfall events), which may confer a degree of frost resistance unrelated to the ambient temperature of its native range.
It is too early to assign a reliable minimum temperature for Yucca lacandonica in cultivation. The La Londe observation of –2 °C survival under tree cover is a single data point, and the protective microclimate provided by an overhead tree canopy (which reduces radiative heat loss and moderates extremes) was likely critical. Nevertheless, this result suggests that Yucca lacandonica may be viable in sheltered positions in the mildest parts of the Mediterranean basin (USDA zone 10a, 9b with protection), greatly expanding the potential cultivation range beyond strictly tropical climates. Further observation over multiple winters is needed to confirm this.
Growing conditions
Given its epiphytic habit, Yucca lacandonica should be grown in a very open, free-draining, bark-based or lithophytic substrate — comparable to what one would use for a large epiphytic orchid or bromeliad, rather than the sandy or mineral soils used for desert yuccas. Mounted on a tree trunk, a large slab of cork bark, or in a generous hanging basket with an open, coarse medium, the plant can express its natural trailing, branching habit. It needs bright light (it grows in the upper canopy in the wild) but not necessarily the full, searing desert sun that most yuccas demand.
Its ultimate size — trunks to 3 m, crowns to 2 m diameter — makes it impractical for most private greenhouses unless regularly pruned.
Comparison with other yuccas in cultivation
| Character | Yucca lacandonica | Yucca gigantea (= Y. elephantipes) | Yucca baccata |
|---|---|---|---|
| Habit | Epiphytic (or lithophytic); sprawling, branching trunks | Arborescent; erect, tree-forming | Acaulescent to short-stemmed; clump-forming |
| Habitat | Tropical rainforest canopy, 0–500(–1,000) m | Tropical dry forest, cultivated worldwide | Desert, piñon-juniper woodland, 400–2,500 m |
| Fruit | Fleshy, juicy, elongated, up to 10 cm | Fleshy | Fleshy, banana-shaped, up to 20 cm |
| Minimum temperature | –2 °C survived under tree cover (La Londe, France January 2026); ultimate limits unknown | –5 to –7 °C | –20 to –25 °C |
| Leaf shape | Narrowly lanceolate, tapering at both ends | Broadly lanceolate, spineless or nearly so | Broadly linear, rigid, spine-tipped |
| Leaf margins | Denticulate, narrow yellow band | Entire or finely toothed | Coarse, curling fibres |
| IUCN status | Endangered | Not assessed (abundant in cultivation) | Not threatened (widespread) |
Conservation
Yucca lacandonica is classified as Endangered (EN) on the IUCN Red List. It is one of only five yucca species listed as endangered by the IUCN, alongside Yucca campestris, Yucca cernua, Yucca endlichiana and Yucca queretaroensis.
The principal threat is deforestation. The species depends on mature, tall-canopy tropical rainforest — a habitat that has been devastated across southern Mexico, Guatemala and Belize by agricultural expansion (particularly cattle ranching), logging, road construction and colonisation. The Selva Lacandona, the type locality and the heart of the species’ Mexican range, has lost an enormous proportion of its original forest cover over the past sixty years. Only fragments remain, notably within the Montes Azules Biosphere Reserve.
The species’ restriction to the canopy of mature forest means that it cannot survive in degraded, secondary or fragmented forest: it requires large, old trees with suitable branch architecture to support its massive epiphytic colonies. Forest fragmentation therefore eliminates not just individual plants but the entire structural habitat that Yucca lacandonica requires.
The Reserva de la Biósfera Montes Azules (Chiapas, Mexico) and the Bladen Nature Reserve (Toledo District, Belize) are the only known protected areas harbouring populations. The species is not currently known from any protected area in Guatemala.
Ex situ conservation is virtually non-existent. The species is extremely rare in botanical gardens and private collections worldwide. Seed is occasionally available from specialist suppliers, but systematic conservation cultivation has not been established.
Significance for understanding the genus Yucca
Yucca lacandonica challenges every assumption about what a yucca is. The genus Yucca is defined in the popular and scientific imagination by its association with deserts, prairies and dry mountains — with sharp spines, CAM photosynthesis, yucca moth mutualism, sandy soils and searing sun. Yucca lacandonica inhabits none of these environments. It grows in one of the wettest, most humid, most biologically complex ecosystems on Earth, suspended in the canopy of tropical rainforest alongside orchids, bromeliads, ferns and aroids.
Its existence raises fundamental questions about the evolutionary plasticity of the Agavoideae. If a yucca can become an epiphyte in tropical rainforest, the ecological limits of this subfamily are far broader than conventionally assumed. The evolutionary pathway that led from terrestrial, xerophytic ancestors to this canopy-dwelling outlier remains unstudied and is a compelling subject for future phylogenetic and ecophysiological research.
The species also stands as a powerful symbol of the conservation crisis in Mesoamerican tropical forests. An irreplaceable evolutionary lineage — a plant that took millions of years to evolve — is being lost to deforestation within the span of a single human generation.
Authority websites and online databases
Plants of the World Online (POWO) — Royal Botanic Gardens, Kew
The primary reference for accepted nomenclature.
Species page: https://powo.science.kew.org/taxon/…
World Flora Online (WFO)
Accepted species record with bibliographic references.
http://www.worldfloraonline.org/taxon/wfo-0000752164
International Plant Names Index (IPNI)
Original publication reference.
https://www.ipni.org/n/270381-2
IUCN Red List
Conservation assessment: Endangered.
https://apiv3.iucnredlist.org/api/v3/taxonredirect/117428124
GBIF — Global Biodiversity Information Facility
Occurrence records and distribution data.
https://www.gbif.org/species/2775702
iNaturalist
Citizen-science observations (very few records, reflecting the species’ rarity and inaccessibility).
https://www.inaturalist.org/taxa/206315-Yucca-lacandonica
Encyclopedia of Life (EOL)
Species overview with IUCN status.
https://eol.org/pages/1083594
Bibliography
Gómez-Pompa, A. & Valdés, J. — “Una especie epífita de Yucca de la selva Lacandona.” Boletín de la Sociedad Botánica de México 27: 43–46, 1962. DOI: 10.17129/botsci.1075. The original species description — the foundational reference.
Hochstätter, F. (ed.) — Yucca (Agavaceae). Band 3: Mexico and Baja California. Self-published, 2004, pp. 39–40, 135–136 (photo material), 240–242 (first description reprinted), 275. ISBN 3-00-013124-8. The most detailed monographic treatment with photographic documentation.
Hochstätter, F. — “Yucca lacandonica (Agavaceae), A new record for Guatemala.” Cactus-Aventures International 106–107, 2015. First documentation of the species in Guatemala.
Davidse, G. et al. (eds.) — Flora Mesoamericana 6: 1–543. Universidad Nacional Autónoma de México, México, D.F., 1994. Regional floristic treatment covering the species’ range.
Eggli, U. (ed.) — Illustrated Handbook of Succulent Plants: Monocotyledons. Springer, 2001. Comprehensive reference including all accepted yucca species.
Espejo Serna, A. & López-Ferrari, A.R. — Las Monocotiledóneas Mexicanas: una Sinopsis Florística 1(1): 1–76. Consejo Nacional de la Flora de México, México D.F., 1993. Mexican monocot checklist.
CONABIO — 2009. Catálogo taxonómico de especies de México. Comisión Nacional para el Conocimiento y Uso de la Biodiversidad, México, D.F. National species catalogue.
Quattrocchi, U. — CRC World Dictionary of Plant Names, vol. 4 (R–Z). Taylor & Francis, 2000, p. 2862. Nomenclatural reference.
García-Mendoza, A.J. & Meave, J.A. (eds.) — Diversidad florística de Oaxaca: de musgos a angiospermas (colecciones y listas de especies), 2nd edition. Instituto de Biología, Universidad Nacional Autónoma de México, 2012. Regional floristic context.
Trelease, W. — “The Yucceae.” Report (Annual) of the Missouri Botanical Garden 13: 27–133, 1902. Foundational genus revision (predates the discovery of Yucca lacandonica, but essential for understanding generic classification).
McKelvey, S.D. — Yuccas of the Southwestern United States, Parts 1–2. Jamaica Plain: Arnold Arboretum of Harvard University, 1938–1947. Major yucca monograph (does not include Yucca lacandonica but provides the generic framework).
Clary, K.H. — 1997. Phylogeny, Character Evolution, and Biogeography of Yucca L. (Agavaceae) As Inferred from Plant Morphology and Sequences of the Internal Transcribed Spacer (ITS) Region of the Nuclear Ribosomal DNA. Ph.D. dissertation, University of Texas. Molecular phylogeny of the genus — relevant for understanding the position of Yucca lacandonica within Yucca.