Accepted name: Dendrochilum maleolens Kraenzl., Orchis 2: 63 (1908)

Subgenus – Acoridium. Section – Convoluta.




Acoridium maleolens (Kraenzl.) Ames, Orchidaceae 7: 81 (1922).


Origin in the Wild




Elevation in the Wild


I could find no information


Habitat in the Wild


This species is only known from the type specimen which was collected in Rizal Province. Nothing else is known about this plants habitat or its exact location.


The Plants Description


This description is taken from Pedersen (1997); Pedersen translated it from Kränzlin's Latin description. The plant reaches a height of approximately 5cm tall. The pseudobulbs are shaped fusiform or lanceolate. The pseudobulbs are covered by a few cataphylls while they are growing. The leaf blades are shaped lanceolate and have acuminate apices. The leaf blades are white margined and minutely dentate?


The Inflorescence


The inflorescence is zig-zaged and is longer than the leaf.


The Flowers


The flowers are green, the side lobes whitish and the rostellum is orange. The dorsal sepal is shaped oblong and has an obtuse apex. The lateral sepals are shaped ovate and have obtuse apices. The petals are shaped broadly rhombic and have obtuse apices. The sepals and petals measure 3mm long, the sepals 2mm wide and the petals 3mm wide. The petals are considerably wider than the sepals. The labellum is 3-lobed and measures 1-1.2mm long. The side lobes are erect, thickened, incurved, shaped falcate and have acute apices. The side lobes clasp the gynostemium. The mid-lobe is smaller, three angled which looks rounded on both sides and acute from the front.


Herbarium Specimens


Unknown, Henrik Pedersen could not locate the type.




Kranzlin described the scent to be like crushed millipedes.


Flowering Season


I could not find any information of when the plant flowers in the wild. The type flowered in cultivation during the month of January.




I do not think this species is in cultivation.


Similar Species




Other Information


This is one of the least known Dendrochilum and a more full description will only be provided when the type is located. Henrik Pedersen (1997) copied his description from Kränzlin's. I have copied Pedersen's description.


Kränzlin described the gynostemium as having two short rounded branches. It is not clear exactly what was meant by this and solving this will determine if Dendrochilum maleolens should be in Subgenus Acoridium. Kränzlin wrote that the leaves are convolute, given this Pedersen placed the plant in section Convoluta but wrote that it could also belong in subgenus Pseudacoridium section Luzonorchis. Kränzlin wrote that this species was allied to Dendrochilum oliganthum.


Reference -


PEDERSEN, Henrik. 1997, The Genus Dendrochilum (Orchidaceae) in the Philippines - A Taxonomic Revision. Opera Botanica, Denmark


World Checklist of Selected Plant Families. 29 July 2009. The Board of Trustees of the Royal Botanic Gardens, Kew. Published on the Internet; accessed 29 July 2009.