Accepted name: Dendrochilum exiguum (Ames) H.A.Pedersen, Opera Bot. 130: 60 (1997)

Subgenus – Pseudacoridium. Section – Luzonorchis.

This photograph was taken by Pieter Pelser and is used with his permission
This photograph was taken by Pieter Pelser and is used with his permission
This photograph was taken by Pieter Pelser and is used with his permission



Pseudacoridium exiguum Ames, Amer. Orchid Soc. Bull. 9: 45 (1940).


Origin in the Wild




Elevation in the Wild


1750 metres


Habitat in the Wild


The only known specimen at the time when Henrik Pedersen reviewed the Philippine Dendrochilum was from the summit of Mount Camotis in Quezon.


The Plants Description


The pseudobulbs measure 5-7mm long and 3-4mm in diameter. The pseudobulbs are shaped pyriform. The leaves are petiolate although the length of the petiole is unknown. The leaf blades are shaped linear-oblanceolate and have obtuse apices that are minutely serrulate. The leaf blades measure 2.5-4cm long and 2.5-4mm wide. The leaves have many nerves.


The Inflorescence


The inflorescence is heteranthous. The peduncle measures 4-5cm long and exceeds the leaves. The rachis measures 1cm long and is fractiflex. The flowers alternate distichously. The bracts are 5mm long and 4mm wide.


The Flowers


The colour is deep orange. The sepals measure 5-6mm long and are connivent to each other into a tube that is larger at its base. The dorsal sepal is shaped linear and has an obtuse apex. The dorsal sepal measures 5mm long and 0.8cm wide. The dorsal sepal is three veined and has an entire margin. The dorsal sepal sometimes adheres slightly to the lateral sepals for half its length. The lateral sepals are connate almost to their apices and measure 5.5-6mm long. The petals are shaped linear-lanceolate and have obtuse to slightly oblique apices. The petals measure 5mm long and 1-1.5mm wide. The petals are three veined and have entire margins. The labellum measures 1.5mm long and 2mm wide. The labellum is bilobed and has a sinus at the junction of the lobes, the lobes spread when the labellum is spread out but are erect when not spread. The side lobes are shaped sub-rhombic and have obtuse apices there is a small callus at the centre of the side-lobe.


Herbarium Specimens


The only known specimen was destroyed at Philippine National Herbarium. No other specimens are known.




I could find no record


Flowering Season


The only known specimen, now destroyed, was collected during May.




I do not think this species is in cultivation


Similar species




Other Information


This species is only known from the holotype which has been destroyed. I have used Pedersen's description which he took from the protologue. This is the only Dendrochilum with hysteranthous inflorescences and connate lateral sepals.


Reference -


PEDERSEN, Henrik. 2007. Changes to Dendrochilum, 2007, The Orchid Review, Vol 115 p220-226


World Checklist of Selected Plant Families. 08 October 2008. The Board of Trustees of the Royal Botanic Gardens, Kew. Published on the Internet; accessed 08 October 2008.