Angraecum guillauminii

Names and Taxonomy

The name Angraecum guillauminii H.Perrier was published in 1950 (Bull. Mus. Natl. Hist. Nat., Ser. 2 22: 114). Current taxonomic databases treat it differently. Kew’s Plants of the World Online lists it as a synonym of Angraecum calceolus Thouars, while other authorities (e.g., Cribb et al. 2009) accept it as a distinct species[1]. The African Plant Database also records it as a rejected name, synonymised under Angraecum calceolus[3]. Consequently, the accepted status of A. guillauminii remains disputed.

How to Identify This Species

Detailed morphological descriptions, measurements of leaves, stems, or flowers, and diagnostic characters for A. guillauminii are not provided in the available references. Without published descriptions or images, reliable field identification cannot be derived from the current sources. Researchers should consult the original protologue or herbarium specimens for definitive characters.

Native Range and Habitat

The species (or its synonym) is recorded from Madagascar in the CITES Orchid Checklist[2]. No specific habitat type (e.g., forest type, host tree, elevation) is documented in the sources consulted.

Species-Specific Care

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Because the horticultural literature does not provide species‑specific recommendations for A. guillauminii, growers are advised to treat it conservatively, following general Angraecum guidelines and adjusting based on plant response.

Flowering and Pollination

No information on flowering period, flower morphology, scent, or pollinators is available for this taxon in the cited sources.

Evidence and Limitations

This profile is based on three authoritative databases. Critical gaps remain in morphology, ecology, and cultivation data. The taxonomic status is contested, and the synonymy with Angraecum calceolus may affect the relevance of any indirect information drawn from that species.