Accepted name: Dendrochilum mirabile J.J.Wood, Lindleyana 7: 77 (1992)

Subgenus – Platyclinis. Section – Longicolumna.


 
 The text is below the photos
 
This photo was taken by the late Jim Comber and bequeathed to the Royal Botanic Gardens Kew. The photo is reproduced with permission from the Director, Royal Botanic Gardens, Kew.
  This photo was taken by Todd Barkman and is used with permission.
 

Synonyms

 

None

 

Origin in the Wild

 

Sumatra

 

Elevation in the Wild

 

2,300 - 2,600 metres

 

Habitat in the Wild

 

This species has been collected on Mount Bandahara in the Mount Leuser Nature Reserve in Aceh. Jim Comber wrote that a plant was found growing close to the ground on stunted trees in montane forest (Comber 2001). The specimen at Leiden was collected at the Gunung Leuser National Park in Aceh at 2600 metres between camps 2-3 and in montane scrub.

 

The Plants Description

 

The pseudobulbs cluster together along the short rhizomes. The pseudobulbs are shaped ovoid to cylindrical and measure 1.5-4.5cm long and 1.3cm wide. The pseudobulbs are a pale yellow colour. The leaves are petiolate; the petiole measure 1.0cm long. The leaf blades are shaped narrowly elliptic and have acute apices. The leaf blades measure 13.5cm long and 2cm wide.

 

The Inflorescence

 

The inflorescence grows as the leaves are developing and just before they are have fully expanded. The peduncle is flattened, curved and measures 9.0-13.5cm long. The rachis is arched or pendent and measures 8-12cm long.

 

The Flowers

 

The flowers are non-rescupinate and contain 30-43 on an inflorescence. The flowers are pale greenish; the column and labellum are pale red-brown. The dorsal sepal is shaped oblong and has an obtuse apex. The dorsal sepal measures 6-7.5mm long and 1.2-1.3mm wide. The lateral sepals are slightly wider and have slightly cucullate apices. The petals are shaped linear and have obtuse apices. The petals measure 6mm long and 0.5mm wide. The labellum is entire and coiled, features which make this species unmistakable.  The labellum has minutely papillose margins. The labellum measures 6.2mm long and 0.7mm wide. The column is slender and measures 5-6mm long. There are no stelidia.

 

Herbarium Specimens

 

Holotype

 

Royal Botanic Gardens, Kew (K)

 

Specimen K000078248 (drawing)

Specimen K000078249 (drawing)

Specimen 55410.000

Specimen K000078246 (photo)

Specimen K000078247 (drawing)

 

National Herbarium Netherlands (L)

 

Specimen L0058677 (photo)

 

Isotype

 

 

Scent

 

I could find no record of scent.

 

Flowering Season

 

Flowering plants have been collected in the wild during April.

 

Culture

 

I do not think this species is in cultivation.

 

Similar species

 

Dendrochilum planiscapum

 

Additional Comments

 

Jim Comber wrote that this species most resembles Dendrochilum planiscapum, which also has the coiled labellum, flattened peduncle and non-resupinate flowers. This species is different from it because there are no stelidia; there are smaller flowers and a denser inflorescence.

 

Reference -

 

COMBER, J.B. Orchids of Sumatra, 2001, Royal Botanic Gardens Kew

 

World Checklist of Selected Plant Families. 28 August 2008. The Board of Trustees of the Royal Botanic Gardens, Kew. Published on the Internet; http://www.kew.org/wcsp/ accessed 28 August 2008.