Angraecum andasibense

Names and Taxonomy

The accepted scientific name is Angraecum andasibense H.Perrier. It was first published in Notul. Syst. (Paris) 7:124 (1938) and is listed as an accepted name by Kew’s Plants of the World Online ^[1]. A later homotypic synonym is Lesliegraecum andasibense (H.Perrier) Szlach., Mytnik & Grochocka (2013) ^[1]. No common name is documented in the available sources.

How to Identify This Species

Growth habit: A miniature epiphytic subshrub that lacks a distinct stem, growing as a compact clump on mossy tree bark. Plants reach roughly 30 cm in height in the wild ^[9].

Leaves: Five to seven linear leaves, each unequally sized, with obtuse bilobed tips. Leaves are arranged along the short axis of the plant and are typical of many Angraecum species ^[8].

Inflorescence: A slender, filiform peduncle 6–12 cm long bearing one to two flowers. The peduncle bears several distant sheaths (2.8–6 cm long) that give the inflorescence a spaced appearance ^[8].

Flowers: Non‑resupinate, yellow‑tinged (often described as “yellowing”) flowers about 8 mm (0.32 in) across. The lip is modestly sized and the nectar spur is short; the flower emits a faint fragrance in the wild ^[8][9]. Flowering occurs in midsummer in the natural habitat, although cultivated plants have been reported to flower throughout the year ^[9].

Native Range and Habitat

Angraecum andasibense is endemic to Madagascar, specifically the northern and east‑central regions of the island ^[1][8]. It occupies wet tropical, moss‑forest environments at elevations around 1 000 m above sea level. The species is epiphytic, attaching to tree trunks and branches where moisture is retained by mosses and lichens.

Species‑Specific Care

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Because the species naturally grows on moss‑covered trunks in humid, montane forest, a well‑ventilated mounting system that retains moisture without stagnation is essential. Warm‑to‑cool temperatures reflect the elevation‑driven climate of its native range. No published data were found on a required rest period or specific fertiliser regime; growers should therefore follow general Angraecum practices and monitor plant response.

Flowering and Pollination

In situ, flowering has been recorded in the midsummer months of the southern hemisphere (approximately December–February) ^[8]. Cultivated specimens on the other hand have been reported to flower throughout the year, suggesting that controlled conditions can induce continuous blooming ^[9]. Individual flowers last only a few days, and the plant emits a faint fragrance, a trait that often attracts nocturnal moth pollinators in related Angraecum species, although pollinator observations for this specific taxon are not documented.

Conservation and Responsible Cultivation

The IUCN Red List assessment for Angraecum andasibense is not cited in the available sources, so its formal conservation status remains Not documented. The species’ restriction to humid forest fragments in Madagascar implies potential vulnerability to habitat loss. Collectors should ensure that any material originates from legally documented propagation and complies with CITES regulations for Orchidaceae ^[4].

Evidence and Limitations

Key morphological and ecological details are drawn from Kew’s Plants of the World Online, the IOSPE species page, and a general orchid database (NativePlants.info). Flowering month information differs between sources, and no peer‑reviewed pollination study exists for this taxon. Care recommendations are limited to habitat‑derived inferences; detailed horticultural trials are lacking. Further field studies and cultivation trials would help refine temperature, watering and fertilisation guidelines.