Accepted name: Dendrochilum atjehense J.J.Sm., Blumea 5: 302 (1943)

Subgenus – Platyclinis. Section – Eurybrachium.

 

 

 

Synonyms

 

None

 

Origin in the Wild

 

Sumatra

 

Elevation in the Wild

 

2,700 - 2,800 metres

 

Habitat in the Wild

 

This species has been collected from Mount Leuser and the Gayo Highlands in Aceh Province.

 

The Plants Description

 

The pseudobulbs grow close together on a short rhizome. The pseudobulbs are rugulose, shaped more or less terete and measure 2.0-4.25cm long. The leaves are petiolate; the petiolate measures 0.7-2cm long. The leaf blades are shaped linear and have short acute apices that are apiculate in their centre. The leaf blades measure 9.5-22cm long and 0.6-0.9cm wide. There are 5 distinct nerves on the blade.

 

Herbarium Specimens

 

Holotype

 

National Herbarium Netherlands, Leiden (L)

 

Specimen L0058467

 

Scent

 

I could find no record

 

Flowering Season

 

The flowering holotype was collected in the wild during January.

 

The Inflorescence

 

The inflorescence is synanthous and grows at the same time as the leaves. The peduncle is erect and measures 8.5-17cm long. The rachis is flattened and measures 5-8cm long. The flowers alternate distichously and are spaced 2.5mm apart.

 

The Flowers

 

Approximately 20 flowers grow on an inflorescence. The dorsal sepal is shaped oblong-triangular and has a subacuminate to acute apex. The dorsal sepal measures 4.7mm long and 1.5mm wide. The dorsal sepal is 3-veined and has entire margins. The lateral sepals are shaped obliquely oblong-ovate and have acute-apiculate apices. The lateral sepals measure 5mm long and 1.8mm wide. The lateral sepals are 3-veined and have entire margins. The petals are concave, shaped oblong-ovate and have acuminate apices. The petals measure 4mm long and 1.7mm wide. The petals are 3-veined and have entire margins. The labellum is 3-lobed, concave at the base and 3-veined. The labellum measures 8mm long and 1.7mm wide. The side lobes are concave, erect and have rounded apices that are raised. The mid-lobe is shaped narrowly triangular and narrows towards the apex, the apex is acute. The mid-lobe measures 2.25mm long and 0.8mm wide. The column measures 1.25mm long. The apical hood is tridentate. The stelidia are wide and have rounded apices that barely reach the apex of the column.

 

Culture

 

I do not think this species is in cultivation

 

Similar Species

 

NA

 

Other Information

 

J.J. Smith wrote (1943) that this species is distinguished by its narrowly triangular shaped mid-lobe and the small column. J.J. Smith also wrote that he did not know of a species that it could be confused with.

 

The epithet refers to Aceh Province in northern Sumatra

 

Reference -

 

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

 

SMITH, J.J. 1943, Orchidaceae Novae Malayenses, Blumea, Volume 5 number 2

 

World Checklist of Selected Plant Families. 11 November 2008. The Board of Trustees of the Royal Botanic Gardens, Kew. Published on the Internet; http://www.kew.org/wcsp/ accessed 11 November 2008.