Accepted name: Dendrochilum pandurichilum J.J.Wood in J.J.Wood & P.J.Cribb, Check-list Orchids Borneo: 190 (1994)

Subgenus – Acoridium. Section – Falsiloba.


 
 
 

Synonyms

 

None

 

Origin in the Wild

 

Brunei, Sabah and Sarawak

 

Elevation in the Wild

 

1500-1900 metres*

 

* see note under Other Information

 

Habitat in the Wild

 

Jeffrey Wood described the habitat as lower montane forest, riparian forest and kerangas forest (Wood 2001). The notes attached to the holotype state “Small orchid growing epiphytically 50ft from ground on bare branch exposed to 80% sunlight. Not common”.

 

The type specimen was collected on Mount Lumaku in Sabah’s Sipitang District.

 

Further collections have been made in Sarawak in Limbang District, Pa Mario River, Ulu Limbang, the route to Mount Batu Lawi, Batu Buli and along the trail from Bario to Mount Batu Lawi.

 

In Brunei this plant has been collected from Belait District in the Badas Forest Reserve.

 

In Sabah this plant has been collected along the Sarawak border NW of Long Pa Sia to the Long Semado trail, Sipitang District.

 

The Plants Description

 

This Dendrochilum is an epiphyte. The pseudobulbs cluster along a short and branching rhizome. The pseudobulbs are shaped ovoid-elliptic and are a yellowish colour. The pseudobulbs measure 5.7mm long and 2.3mm in diameter. The pseudobulbs are covered by 3 cataphylls while they are growing. The cataphylls disintegrate into non-persistent fibres as the pseudobulbs mature. The leaves are petiolate, the petiole measures 1-3mm long. The leaf blades are shaped ligulate and have obtuse and mucronate apices. The leaf blades measure 0.8-3.5cm long and 0.2-0.4cm wide.

 

The Inflorescence

 

The inflorescence is synanthous and is free from the subtending leaf at the time of flowering. The peduncle is erect, filiform and measures 1-3.5cm long. The rachis is erect and measures 0.6-1.8cm long. The flowers are spaced 2mm apart. There are no non floriferous bracts on the rachis. The flowers open from the distal section of the rachis.

 

The Flowers

 

Jeffrey Wood wrote that the there are between 3 and 8 flowers on an inflorescence. The flowers are pale orange (Wood 2001). The dorsal sepal is shaped ovate-elliptic and has a subacute apex. The dorsal sepal measures 3mm long and 1-1.1mm wide. The dorsal sepal has an entire margin and is one veined. The dorsal sepal is concave, looks hooded and its vein is prominent. The lateral sepals are shaped triangular-ovate and have subacute apices. The lateral sepals have entire margins and are one veined. The lateral sepals measure 2.9mm long and 1.5-1.6mm wide. The lateral sepals are somewhat concave. The petals are shaped linear or slightly falcate and have acute apices. The petals have entire margins and are one veined. The petals measure 2.9-3mm long and 0.8-0.9mm wide. The labellum is pandurate and entire. The labellum is shaped trilobulate, the lateral lobules are obtuse the median lobule is tooth like and has a subacute apex. The margins on the labellum are entire. The labellum has two wing-like keels that look like side lobes. The column is curved and measures 3mm long. There is a tiny apical hood that is entire. There are no stelidia and no column foot. The anther cap is cucullate.

 

Herbarium Specimens

 

Holotype

 

Royal Botanic Gardens, Kew (K)

 

Specimen 60731.000

Specimen K000078147 (photo)

Specimen K000078148 (drawing)

 

 

Other herbarium specimens

 

Royal Botanic Gardens, Kew (K)

 

National Herbarium Netherlands (L)

 

Specimen L0322685

Specimen L0322686

 

SAR

 

Royal Botanic Gardens, Kew (K)

 

Specimen 60730.000 **

Specimen 61445.000

Specimen 60732.000 **

 

Scent

 

I could find no record.

 

Flowering Season

 

Flowering plants have been collected in the wild during January, March, August, October and December.

 

Culture

 

I do not think this species is in general cultivation although I believe a live plant of it exists in at the Hortus Botanicus in Leiden.

 

Similar Species

 

NA

 

Other Information

 

** Jeffrey Wood questions the validity of collection made at 10 meters elevation in Brunei.

 

The epithet refers to the shape of the labellum.

 

Reference

 

BEAMAN, Teofila, WOOD, Jeffrey, BEAMAN, Reed, BEAMAN, John. 2001, Orchids of Sarawak, Natural History Publications Borneo, Kota Kinabalu, Malaysia.

 

WOOD, Jeffrey. 1997, Orchids of Borneo volume 3. The Sabah Society, Kota Kinabalu, Malaysia.

 

WOOD, Jeffrey. Dendrochilum of Borneo, 2001. Natural History Publications (Borneo), Malaysia.

 

World Checklist of Selected Plant Families. 09 January 2009. The Board of Trustees of the Royal Botanic Gardens, Kew. Published on the Internet; http://www.kew.org/wcsp/ accessed 09 January 2009.