Bulbophyllum membranaceum
A tiny creeping epiphyte with small round pseudobulbs, each with one leaf, and maroon flowers about 6 mm long. It ranges from Thailand and Malesia out to Palau, Vanuatu, Fiji and Samoa. It grows in warm, wet lowland and hill forest, including mangroves. It wants steady warmth, high humidity and frequent watering all year, and is best grown mounted.
Where it grows wild
Herbarium labels describe it as a creeping epiphyte on tree trunks and mossy branches in humid forest. It also grows on mangrove trees (Rhizophora and Bruguiera in Palau and Samoa), in riverine and ridge forest, on a rock face in Sulawesi, and in dense cloud forest on Tanna in Vanuatu. It is often recorded as common where it occurs.
Mostly lowland: many labels are from near sea level, such as mangroves in Palau and Samoa, and from 100 to 450 m. The highest are 550 to 900 m in Vanuatu, Samoa and Sulawesi. The four measured elevations, 550 to 700 m, come from the upper end of this range.
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Profiles are drafts built from measured range and climate and from published sources; each section carries its own confidence in the app. Photo from Wikimedia Commons, used under its CC BY-SA 4.0 licence, unmodified.