Accepted name: Dendrochilum corrugatum (Ridl.) J.J.Sm., Recueil Trav. Bot. Néerl. 1: 65 (1904)

Subgenus – Platyclinis. Section – Eurybrachium.


 
 

Synonyms

 

Platyclinis corrugata Ridl., Trans. Linn. Soc. London, Bot. 4: 233 (1894).

Acoridium corrugatum (Ridl.) Rolfe, Orchid Rev. 12: 220 (1904).

Dendrochilum fimbriatum Ames, Orchidaceae 6: 51 (1920).

 

Origin in the Wild

 

Sabah

 

Elevation in the Wild

 

1500-2100 metres

 

Habitat in the Wild

 

This species is endemic to Mount Kinabalu. Most specimens in herbarium appear to have been collected from Marai Parai Spur.

 

Jeffrey Wood wrote that this species is mostly a twig epiphyte in lower montane forest and Leptospermum spp ridge scrub on ultramafic substrate. This species favours open spaces where it avoids the shade of the canopy (Wood 2003).

 

This species has been recorded as an epiphyte and lithophyte.

 

The Plants Description

 

The pseudobulbs clump on a creeping rhizome that can grow to 6cm long. The pseudobulbs are coloured green suffused with red or entirely red and shaped ovoid-globose or broadly ellipsoid, rugulose. The pseudobulbs measure 0.5-1.6cm long and 0.5-0.7cm in diameter. The pseudobulbs are covered by 2-3 cataphylls while they are growing. The cataphylls disintegrate into non-persistent fibres as the pseudobulbs mature. The leaves are petiolate; the petiole measures 0.8-3.0cm long. The leaf blades are shaped linear to linear-lanceolate with acute apices that are minutely apiculate. The leaf blades measure 5.5-13.5cm long and 0.5-1cm wide. The leaves are coloured dark olive-green and have 3-4 distinct nerves.

 

The Inflorescence

 

The peduncle is curved and measures 5.5-10cm long. The rachis is arching to pendent and measures 5-16cm long. The rachis is reddish and quadrangular in cross-section. The flowers alternate distichously and are spaced 1.8-2mm apart. There are 3-4 non-floriferous bracts at the base of the rachis.

 

The Flowers

 

The flower has sepals and petals that are creamy white, the labellum is yellowish-green, the column is deep pink or orange and the anther cap is yellow. The sepals and petals spread widely. The dorsal sepal is shaped lanceolate and has an acute apex that is reflexed. The dorsal sepal measures 4-4.5mm long and 1.5mm wide. The dorsal sepal has entire margins and is 3-veined. The lateral sepals are shaped ovate-lanceolate, falcate and have acute apices that are reflexed. The lateral sepals measure 3.5mm long and 1.9-2mm wide. The laterals have entire margins and are 3-veined. The petals are shaped lanceolate and have acuminate to acute apices. The petals measure 3.5-4mm long and 1mm wide. The petals have minutely erose-dentate margins and are 1-veined. The labellum is 3 veined, entire, shaped broadly ovate-rotundate and triangular-apiculate at its apex. The labellum is sometimes shallowly 3-lobed; it is somewhat concave at its base. The margins on the labellum are irregularly fimbriate. There are two calli that are half the length of the labellum, the calli are located along the lateral nerves. The column is 0.7-0.8mm long. The apical hood is rounded and has an entire margin. The stelidia grow from the base of the column are shaped oblong and have obtuse apices. The stelidia measure 0.3-0.4mm long. The stelidia do not exceed the apical hood.

 

Herbarium Specimens

 

Holotype

 

SAR

 

AMES

 

Specimen 48119 (photo) (Dendrochilum fimbriatum)

 

 

Isotype

 

NA

 

 

Other herbarium specimens

 

Royal Botanic Gardens, Kew (K)

 

Specimen K000078206

Specimen 47660.000

Specimen K000078205

Specimen 61409.000

Specimen 60400.000

 

BM

 

BO

 

National Herbarium Netherlands, Leiden (L)

 

Specimen L0322434

Specimen L0322435

Specimen L0322436

 

SING

 

E

 

Sabah Parks Herbarium

 

HBG

 

SAN

 

Scent

 

No

 

Flowering Season

 

Flowering plants have been collected in the wild from March to May and from August to November.

 

Culture

 

I do not think this species is in cultivation

 

Similar Species

 

Dendrochilum cupulatum (see this page for the differences)

Dendrochilum alatum

 

Other Information

 

Oakes Ames described Dendrochilum fimbriatum. Ames wrote that the stelidia are unusual and indicate an affinity with Dendrochilum alatum (Ames 1920). The type of D. fimbriatum was collected on Mount Kinabalu along the Marai Parai Spur by Clemens. Jeffrey Wood added Dendrochilum fimbriatum as a synonym of Dendrochilum corrugatum. Wood wrote that the floral characteristics of the two species were the same. Wood re-worded Ridley’s original description in his book, The Dendrochilum of Borneo.

 

The epithet refers to the habit of its pseudobulbs becoming wrinkled even when they are mature.

 

Jeffrey Wood wrote that this species is closely related and similar to Dendrochilum alatum but differs by its broader and fimbriate labellum, falcate lateral sepals, and petals that are not twisted 90 degrees from vertical.

 

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.

 

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

 

World Checklist of Selected Plant Families. 15 February 2009. The Board of Trustees of the Royal Botanic Gardens, Kew. Published on the Internet; http://www.kew.org/wcsp/ accessed 15 February 2009.