Angraecum compressicaule

Names and Taxonomy

Angraecum compressicaule H.Perrier is the accepted scientific name for this species according to Kew’s Plants of the World Online. The name was first published in Notul. Syst. (Paris) 7: 118 (1938) and remains valid. A later homotypic synonym is Perrierangraecum compressicaule (H.Perrier) Szlach., Mytnik & Grochocka, published in 2013. No other synonyms or varietal names are documented.

How to Identify This Species

The plant is a miniature to small‑sized epiphytic (occasionally lithophytic) subshrub. It produces a short, rigid, compressed stem that is sheathed by carinate (keeled) leaf bases. The apical leaves are 5–10 in number, distichous, coriaceous, linear, slightly arched, and basally contracted, giving the stem a “compressed” appearance. Mature plants reach about 30 cm in height in cultivation.

The inflorescence is a short, single‑flowered spike 4–8 mm long, emerging from the upper leaves. The flower is white (sometimes described as green‑white) and reported to be fragrant. Individual flowers are small, roughly 4–8 mm across, and bloom singly during the summer months in the wild.

Because the species is rarely cultivated, identification should be confirmed with herbarium material or a reliable photograph showing the compressed stem, carinate sheaths, and the distinctive single white flower.

Native Range and Habitat

Angraecum compressicaule is endemic to central Madagascar, specifically recorded from mossy forest sites around 1 400–1 800 m altitude, such as the Tsinjoarivo region. It grows as an epiphyte on tree branches or as a lithophyte on moss‑covered rocks in seasonally dry tropical biomes. The habitat is characterized by cool, humid conditions typical of high‑elevation forest patches.

Species‑Specific Care

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Because detailed horticultural studies are lacking, growers should mimic the plant’s natural cool, humid, and well‑aerated epiphytic environment. Maintaining moderate humidity, providing bright but filtered light, and avoiding prolonged dryness are prudent starting points.

Flowering and Pollination

In the wild, flowering occurs in the summer months (Southern Hemisphere summer) and each stem bears a single flower that lasts for a short period. The flower is white, fragrant, and possesses a short spur typical of many Angraecum species. No specific pollinator has been documented for this species; pollination biology remains unknown.

Evidence and Limitations

The profile relies on a limited set of sources: taxonomic confirmation from Kew’s POWO, morphological description from IOSPE, herbarium data from the Muséum national d’Histoire naturelle (MNHN), and a brief cultivation note from NativePlants.info. Key horticultural parameters such as precise temperature ranges, watering frequency, and humidity requirements are not documented in the available literature. Further field observations and cultivation trials are needed to refine care recommendations and to clarify pollination biology.