Accepted name: Dendrochilum joclemensii Ames, Orchidaceae 6: 55 (1920)

Subgenus – Platyclinis. Section – Eurybrachium.


 
 
 

Synonyms

 

None

 

Origin in the Wild

 

Sabah

 

Elevation in the Wild

 

1050-2000 metres

 

Habitat in the Wild

 

The type specimen was collected on the Marai Parai Spur on Mount Kinabalu. Further collections on Mount Kinabalu have been taken from the Kadamaian River, Kaui View Trail, and the Kimanis road.

 

Jeffrey Wood wrote that this species is a twig epiphyte in lower montane ridge forest on ultramafic and granite substrate. Anthony Lamb has also recorded this plant as a terrestrial on a mossy roadside bank.

 

The Plants Description

 

The pseudobulbs clump on a shortly creeping rhizome that can grow to 6cm long. The pseudobulbs are coloured green and are shaped subfusiform becoming rugulose. The pseudobulbs measure 1-1.4cm long and 0.3-0.5cm in diameter. The pseudobulbs are covered by 3 cataphylls while they are growing. The cataphylls soon disintegrate into non-persistent fibres as the pseudobulbs mature. The leaves are petiolate; the petiole measures 0.3-0.9cm long. The leaf blades are shaped linear with obtuse and apiculate to shortly acute apices. The leaf blades measure 4.5-10cm long and 0.3-0.4cm wide. The leaves have 3 distinct nerves.

 

The Inflorescence

 

The peduncle is greenish-orange, erect and measures 2.2-4cm long. The rachis is salmon pink, gently curved to pendent and measures 4-5.5cm long. The rachis is quadrangular in cross-section. The flowers alternate distichously and are spaced 2-3mm 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

 

Jeffrey wood wrote that up to 24 flowers grow on an inflorescence. The flower is translucent salmon-pink, pale orange or yellow and pale salmon-pink at the base of the labellum. Oakes Ames described the flowers as salmon-pink. The sepals and petals open widely and are reflexed. The dorsal sepal is shaped narrowly ovate-elliptic and has an acute to acuminate apex. The dorsal sepal measures 2.5-3mm long and 1mm wide. The dorsal sepal has an entire margin and is three veined. The lateral sepals are slightly carinate, shaped narrowly ovate-elliptic and have acute to acuminate apices. The lateral sepals measure 2.5-3mm long and 1.1mm wide. The lateral sepals have entire margins and are three veined. The petals are shaped narrowly elliptic and have acute apices. The petals measure 2.5-2.8mm long and 0.9-1mm wide. The petals have entire margins and are one veined. The labellum is three veined and obscurely lobed, the lobes hidden by the keels. The mid-lobe is shaped oblong and abruptly contracts towards its acuminate apex. The labellum measures 2-2.2mm long and 0.8-1mm wide. The margins on the labellum are entire. There are 2 flattened keels that run half the length of the labellum along the lateral nerves. The median nerve is prominent and slightly elevated. The column measures 1-1.5mm long. The apical hood is strongly concave, shaped orbicular and has an entire margin. The stelidia grow from the base of the column and do not reach the column apex are shaped oblong and have rounded to truncate apices. The stelidia measure 0.8mm long and 0.5mm wide.

 

Herbarium Specimens

 

Holotype

 

AMES

 

Specimen 20264 (photo)

 

 

Isotype

 

NA

 

 

Other herbarium specimens

 

Sabah Parks Herbarium

 

SING

 

Royal Botanic Gardens Kew (K)

 

Specimen 56506.000

Specimen K000078211

 

National Herbarium Netherlands (L)

 

Specimen L0269621

 

Scent

 

No

 

Flowering Season

 

Flowering plants have been collected in the wild from October to December and during July.

 

Culture

 

I do not think this species is in cultivation

 

Similar Species

 

 

 

Other Information

 

The epithet refers to Joseph Clemens who made many collections of plants on Borneo.

 

Ames wrote that the species is similar to Dendrochilum alatum and Dendrochilum fimbriatum (D. corrugatum) on account of its entire labellum and stelidia. Ames went on to say that the material from which he wrote his description was incomplete and broken from the tip of the raceme.

 

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. 08 March 2009. The Board of Trustees of the Royal Botanic Gardens, Kew. Published on the Internet; http://www.kew.org/wcsp/ accessed 08 March 2009.