Accepted name: Dendrochilum subintegrum Ames, Orchidaceae 6: 65 (1920).

Subgenus – Platyclinis. Section – Platyclinis.


 
 

Synonyms

 

None

 

Origin in the Wild

 

Sabah and Sarawak

 

Elevation in the Wild

 

1200-1500 metres

 

Habitat in the Wild

 

This species has been found in Sabah on Mount Kinabalu close to the Lubang Cave. This plant has also been found in Sabah’s Sipitang District halfway along the Maligan to Long Pa Sia trail and the Long Pa Sia to Long Samado trail near the crossing with the Malabid River. Another specimen has been collected near the headwaters of the Rurun River, Sipitang District.

 

In Sarawak this species has been collected on Mount Temabok in the Tama Abu Range, Marudi District. A further collection has been made in the Belaga District at Kapit.

 

Jeffrey Wood (2001) described the habitat as lower montane forest and low kerangas forest often with Pandanus spp and rattan understorey. This plant can be found as an epiphyte or a terrestrial.

 

The Plants Description

 

The rhizome is elongated, branched and has internodes spaced 2.8-4.5cm apart. The pseudobulbs are spaced 4-12cm apart along the rhizome, often at an acute angle to the rhizome and are shaped narrowly cylindrical or cauliform. The pseudobulbs measure 8-11cm long and 0.4-0.5cm in diameter. The pseudobulbs are covered by 3 cataphylls while they are growing. The cataphylls disintegrate into persistent fibres as the pseudobulbs mature. The leaves are petiolate; the petiole measures 1.0-2.5cm long. The leaf blades are shaped broadly elliptic or oblong elliptic and have shortly obtuse and mucronate apices. The leaf blades measure 16-18.5cm long and 1.5-5cm wide. The leaves are coriaceous and have 7-9 distinct nerves.

 

The Inflorescence

 

The inflorescence is synanthous. The peduncle is erect and measures 8-14cm long. The rachis is gently curved to curved and measures 12-16cm long. The rachis is quadrangular in cross-section. The flowers alternate distichously and are spaced 1-2mm apart. There are 1-2 non-floriferous bracts at the base of the rachis.

 

The Flowers

 

Ames described the flowers as yellowish (1920). Jeffrey Wood wrote that the flowers are cream, yellowish or very pale greenish, the labellum white or pale greenish, pale orange or ochre at its centre (Wood 2001). The dorsal sepal is shaped oblong-lanceolate and has an acute apex. The dorsal sepal measures 3-4.1mm long and 1mm wide. The dorsal sepal has an entire margin and is three veined. The lateral sepals are shaped slightly obliquely oblong-lanceolate, almost subfalcate and have acute apices. The lateral sepals measure 3-4mm long and 1mm wide. The lateral sepals have entire margins and are three veined. The petals are shaped oblong-lanceolate, subfalcate and have acute apices. The petals measure 2.5-3.5mm long and 0.9-1mm wide. The petals have minutely erose margins and are three veined. The labellum is sub-entire, shortly clawed and three veined. The labellum measures 2.25-2.9mm long and 0.8-0.9mm wide. The side lobes are minute and shaped rounded or triangular. The mid-lobe is shaped trullate-lanceolate, is rounded and has an acute apex. The margins are entire and irregularly toothed along the side lobes. There is a low M shaped callus that terminates at the start of the mid-lobe. The column is curved and measures 1.5-1.6mm long. The column foot is prominent. The apical hood is shaped obscurely triangular and has an obtuse apex. The stelidia grow upwards from the base of the column and terminate just below the column apex. The stelidia are shaped ligulate, subfalcate and have obtuse or subacute apices; the stelidia measure 1.2-1.6mm long.

 

Herbarium Specimens

 

Holotype

 

AMES


Specimen 48123 (photo)

 

 

Other herbarium specimens

 

AAU

 

Royal Botanic Gardens, Kew (K)

 

Specimen K000078254

Specimen 60753.000

 

National Herbarium Netherlands (L)

 

Specimen L0322754

Specimen L0322755

Specimen L0322756

Specimen L0322758

 

MEL

 

SING

 

Scent

 

Yes, sweetly scented

 

Flowering Season

 

Flowering plants have been collected in the wild during August and from November to December.

 

Culture

 

I do not think this species is in cultivation

 

Similar Species

 

Dendrochilum lancilabium (see this page for the differences)

Dendrochilum longipes (see this page for the differences)

 

Other Information

 

Ames wrote that this plant is habitually similar to Dendrochilum longirachis but differs by the shape of the labellum. Jeffrey Wood wrote (2001) that Ames description in 1920 was not entirely correct. Ames wrote that the pseudobulbs cluster at the growing point. Jeffrey Wood wrote that two of the clustered pseudobulbs that Ames described are branches of the rhizome. Jeffrey Wood wrote that the habit is identical to Dendrochilum longipes.

 

The epithet refers to the sub entire labellum.

 

Reference

 

AMES, Oakes. 1920, Illustrations and studies of the Family Orchidaceae Facsimile 6 The Orchids of Mount Kinabalu British North Borneo, Ames Botanical Laboratory, North Easton, Massachusetts, Boston.

 

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

 

World Checklist of Selected Plant Families. 19 March 2009. The Board of Trustees of the Royal Botanic Gardens, Kew. Published on the Internet; http://www.kew.org/wcsp/ accessed 19 March 2009.