Accepted name: Dendrochilum angustifolium Ridl., J. Straits Branch Roy. Asiat. Soc. 39: 77 (1899).

Subgenus – Dendrochilum.

 

 

 

 

Synonyms

 

Acoridium angustifolium (Ridl.) Ames, Blumea, Suppl. 1: 69 (1937).**

 

**I have not found the original description yet, but the holotype specimens in Ames are now considered to be Dendrochilum stenophyllum, further information can be found down the page.

 

Origin in the Wild

 

Sumatra

Malaysia (Peninsula)

 

Elevation in the Wild

 

Aceh, Sumatra - 2,600 metres

Peninsula Malaysia - 1767 metres

 

Habitat in the Wild

 

Jim Comber wrote (2001) that this species has been collected from Bur ni Telong in Aceh. On Peninsula Malaysia this plant has been found in Pahang, Bentung, Genting Highlands, Gunung Ulu Kali. A further specimen was collected during 1929 in Pahang on Fraser Hill.

 

The Plants Description

 

The rhizomes grow to 20cm long and branch. The pseudobulbs are spaced up to 2.5cm apart. The pseudobulbs are narrow and conical and grow to 1.5cm long, they are orange. The leaf petiole is very short and the blade lanceolate with acute apices, the blade measures between 5-9cm long and 5-7mm wide.

 

The Inflorescence

 

The average inflorescence length recorded is 20cm. Jim Comber wrote that it is three times the length of the leaf.

 

The Flowers

 

The flowers are greenish-white and small. The sepals measure 3mm long and lanceolate. The petals measure 3mm long but are narrower. The labellum is entire with three ridges close to the base. The column is short. The stelidia grow from the base of the column and curve upwards until they almost touch the apical hood.

 

Herbaria specimens

 

Holotype

 

 

Isotype

 

 

Other herbarium specimens

 

Kew Botanical Gardens (K)

 

Specimen 21618.000

Specimen K000364659

 

Natural History Museum (BM)

 

Specimen Robinson, H.C. & Kloss, C.B. 204

 

Scent

 

Not known

 

Flowering Season

 

Flowering plants have been collected in the wild during March, May and September.

 

Culture

 

I do not think this species is in cultivation

 

Similar Species

 

Dendrochilum pallidiflavens

Dendrochilum taeniophyllum (see this page for the differences)

 

Additional Comments

 

Jim Comber wrote that Holttum mentioned that this species could be a mountain form of Dendrochilum pallidiflavens. Jim Comber discredits this however and says that the leaf and flower shape are different as well as the length of the inflorescence compared to the length of the leaves, Dendrochilum pallidiflavens is only as long as the leaves if not shorter.

 

**The specimens labelled as Acoridium angustifolium in the AMES herbarium were examined by Henrik Pedersen and considered to be Dendrochilum stenophyllum. The Ames specimens labelled as this species and Dendrochilum angustifolium are not the same.

 

Reference -

 

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

 

World Checklist of Selected Plant Families. 16 August 2008. The Board of Trustees of the Royal Botanic Gardens, Kew. Published on the Internet; http://www.kew.org/wcsp/ accessed 16 August 2008.