Accepted name: Dendrochilum kelabitense J.J.Wood, Orchids Sarawak: 276 (2001)



Subgenus – Platyclinis. Section – Platyclinis.


 

Synonyms

 

None

 

Origin in the Wild

 

Sarawak

 

Elevation in the Wild

 

1,000 metres

 

Habitat in the Wild

 

This species was collected in the Marudi District on the trail from Bario to Pa Berang.

 

The habitat has been described as lower montane kerangas forest.

 

The Plants Description

 

The pseudobulbs are shaped ellipsoid and measure 2.2cm long and 1.0cm in diameter. The pseudobulbs are covered by 4 cataphylls while they are growing. The cataphylls disintegrate into fibres as the pseudobulbs mature. The leaves are petiolate. The immature leaf blades are shaped linear and have acute apices. The immature blades measure 7.5cm long and 0.1cm wide. The leaves are rigid and deeply canaliculated.

 

The Inflorescence

 

The inflorescence is synanthous and appears before the leaves have fully expanded. The peduncle is gently decurved and measures 3.0-5.0cm long. The rachis is pendent and measures 9.5-13.0cm long. The rachis is quadrangular in cross-section. The flowers alternate distichously and are spaced 2.8-3.0mm apart. There are no non floriferous bracts at the base of the rachis. The flowers open from the distal section of the rachis.

 

The Flowers

 

The colour has not been recorded although Jeffrey Wood assumes the colour to be white or greenish (Beaman, et al 2001). The dorsal sepal is shaped narrowly elliptic and has an acuminate apex.  The dorsal sepal measures 4.4-4.5mm long and 1.0mm wide. The dorsal sepal is three veined and has an entire margin. The lateral sepals are shaped narrowly elliptic and have acuminate apices. The lateral sepals measure 4.0-4.2mm long and 1.1mm wide. The lateral sepals are three veined and have entire margins. The petals are shaped linear-lanceolate and have acuminate apices. The petals measure 4.0mm long and 2.2-2.5mm wide. The petals are three veined and have entire margins. The labellum is stipitate to the column foot by a short claw, decurved, three nerved and 3-lobed. The labellum measures 3.0mm long and 1.0mm wide. The side lobes are erect, shaped narrowly triangular and have acute apices. The mid-lobe is shaped narrowly elliptic and has an acute apex. The margins on the labellum are entire, the basal margins of the side lobes are slightly incurved. There are three low keels than terminate just past the base of the mid-lobe. The keels are joined at the base of the labellum. There is a median keel is not as prominent as the two lateral keels. The column is gently incurved and measures 2.0mm long. The apical hood is elongated and has a tridentate apex, the middle tooth is sometimes bidentate. The stelidia grow outwards from the middle of the column and equal to the column apex. The stelidia are shaped sigmoid, falcate and have acute apices, the stelidia measure 1.2mm long.

 

Herbarium Specimens

 

Holotype

 

National Herbarium Netherlands, (L)

 

Isotype

 

Royal Botanic Gardens, Kew (K)

 

I could not locate the specimen

 

Scent

 

I could find no record.

 

Flowering Season

 

Flowering plants were collected in the wild during March.

 

Culture

 

I do not think this species is in general cultivation. I believe that a living plant is held at the Hortus Botanicus in The Netherlands.

 

Similar Species

 

Dendrochilum angustipetalum

 

Other Information

 

This species is similar to Dendrochilum angustipetalum but differs by being found in the Kelabit Highlands, not Mount Kinabalu or Mount Tembuyuken, its linear aciculate leaves, no non-floriferous bracts, entire margins of the side lobes and no elevated median keel (Wood 2001).

 

The type collection does not include a rhizome or mature leaves.

 

Reference

 

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

 

WOOD, Jeffrey. 2003, Orchids of Borneo volume 4. The Sabah Society, Kota Kinabalu, Malaysia.

 

World Checklist of Selected Plant Families. 23 July 2009. The Board of Trustees of the Royal Botanic Gardens, Kew. Published on the Internet; http://www.kew.org/wcsp/ accessed 23 July 2009.