Angraecum elephantinum

Names and Taxonomy

The accepted scientific name is Angraecum elephantinum Schltr. The name was first published in Notizbl. Bot. Gart. Berlin-Dahlem 7: 330 (1919) ^[1][2]. Kew’s Plants of the World Online lists it as an accepted name and records its native range as Central Madagascar ^[1]. A later homotypic synonym is Perrierangraecum elephantinum (Schltr.) Szlach., Mytnik & Grochocka (2013) ^[1][2]. No other common names are documented in the available sources.

How to Identify This Species

Angraecum elephantinum is a compact epiphytic subshrub, typically 10–15 cm tall with a stout, cylindrical stem about 8 mm in diameter ^[5]. Leaves are leathery, lingulate, 7.5–10 cm long and 2–2.5 cm wide, unequally bilobed at the tip ^[5]. The inflorescence is extremely short; the peduncle is completely sheathed and bears usually a single flower (occasionally two) ^[5].

The flower is the most diagnostic feature. Sepals are flat, lingulate, and about 35 mm long; petals are similar in length and lanceolate‑lingulate ^[5]. The labellum is broadly ovate‑oblong, roughly 3 × 2 cm, concave at the base and bears a median keel; it is supported by a very long, filiform spur up to 11 cm long ^[5][10]. The flower is white, star‑shaped, and emits a strong nocturnal fragrance described as a mix of “deep heat and almonds” ^[10]. Flower size can reach up to 6.8 cm (2½ in) across, making it appear almost as large as the plant itself ^[11].

These characters together—compact habit, very short sheathed inflorescence, large white flower with an 11 cm spur—distinguish A. elephantinum from other Angraecum species that typically have longer stems, multiple flowers, or differently proportioned lips.

Native Range and Habitat

The species is endemic to Madagascar. Kew records a central distribution, while several growers note occurrences in the eastern and mountainous parts of the island ^[1][5][10]. It grows as an epiphyte on tree trunks and branches within wet tropical forest biomes, often at higher elevations where cooler temperatures prevail. The exact elevational range is not documented in the sources consulted.

Species‑Specific Care

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In practice, growers have found that maintaining the lower temperature limit (≈12 °C) during the cooler months helps trigger the characteristic winter‑time bloom. The plant tolerates a range of light conditions but performs best with bright, indirect light that mimics its forest canopy habitat.

Flowering and Pollination

Flowering occurs in the fall to winter months (approximately May–August in the Southern Hemisphere) ^[11]. Flowers open in the evening and emit a strong fragrance throughout the night, a trait that attracts nocturnal pollinators. The exceptionally long spur (up to 11 cm) is adapted for pollination by long‑tongued hawk moths, a relationship reported by growers familiar with the species ^[10]. Individual flowers are long‑lasting, remaining open for several nights under suitable conditions.

Evidence and Limitations

The profile relies on taxonomic databases (Kew, IPNI) for name status and distribution, and on cultivation notes from several orchid growers for care and phenology. Precise elevational limits, formal conservation assessments, and detailed ecological interactions are not documented in the sources accessed. Future field studies would be valuable for confirming habitat specifics and conservation status.