Angraecum obversifolium

Names and Taxonomy

The accepted scientific name for this orchid is Angraecum obversifolium Frapp. ex Cordem., first published in 1895【4】. It has been treated under a few synonyms:

• Mystacidium obversifolium (Frapp. ex Cordem.) Cordem. (1899)【4】
• Angraecoides obversifolia (Frapp. ex Cordem.) Szlach., Mytnik & Grochocka (2013)【4】

The taxonomic status is disputed: Plants of the World Online (2025) lists the name as a synonym of Angraecum multiflorum【6】, whereas other regional floras and orchid databases continue to recognise it as a distinct species【4】【8】. Until a consensus is reached, both usages appear in the literature.

How to Identify This Species

Typical plants are medium‑sized epiphytes growing on tree trunks in shaded forest. Key diagnostic features include:

• Growth habit: Erect to pendant stems bearing two ranks of leaves; roots form a tight, white‑ish sheath around the stem.
• Leaves: Thin, falcate (curved) leaves that turn outward near the tip; the apex is minutely bilobed.
• Inflorescence: Axillary, very slender spikes that emerge from the same point on the stem for several years, bearing 2–4 flowers.
• Flowers: Small (≈1 cm diameter), green, with a short spur; they appear in spring to early summer【4】.

Because several Mascarene Angraecum species share a compact habit, leaf shape and flower size should be examined together. Comparison with the closely related Angraecum multiflorum (if treated as separate) may be necessary, but definitive separation often requires floral morphology details not always visible in cultivated specimens.

Native Range and Habitat

Angraecum obversifolium is endemic to the Mascarene Islands, specifically the islands of Mauritius and Réunion【6】. It occurs in shady, montane forests at elevations of 1 000–1 800 m【4】, typically as an epiphyte on native trees. The habitat is characterized by high humidity and frequent cloud cover, conditions that keep the orchid’s roots moist while providing diffuse light.

Species‑Specific Care

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In practice, growers who have successfully cultivated this species report using a cool greenhouse or indoor environment with high, indirect light and mounting the plant on a well‑aerated bark slab. Watering should keep the roots moist but not waterlogged; however, precise regimes have not been published for this taxon.

Flowering and Pollination

Flowering occurs from spring through early summer in its native range【4】. Flowers are short‑lived, green, and approximately 1 cm across. No specific pollinator has been documented for A. obversifolium; the modest spur suggests pollination by small moths or flies, a hypothesis that remains untested.

Conservation and Responsible Cultivation

Conservation assessments are uncertain. A 2010 field report (Bernet) noted the species as “rediscovered,” but later databases (POWO 2025) treat it as a synonym of A. multiflorum, leaving its exact status unclear【6】. Habitat loss on the Mascarene islands threatens many endemic orchids, so any collection should comply with local regulations and preferably rely on cultivated material.

Evidence and Limitations

The profile relies on a limited set of online resources. Detailed measurements of temperature ranges, watering schedules, and pollinator observations are not documented in the available literature. Taxonomic consensus is still in flux, and future revisions may alter the accepted name or synonymy. Readers are encouraged to consult primary floras, herbarium specimens, or recent taxonomic revisions for the most up‑to‑date information.