Accepted name: Dendrochilum sublobatum Carr, Gard. Bull. Straits Settlem. 8: 86 (1935)

Subgenus – Platyclinis. Section – Platyclinis.


 
 

Synonyms

 

None

 

Origin in the Wild

 

Sarawak

 

Elevation in the Wild

 

1230-1900 metres

 

Habitat in the Wild

 

This species so far has only been recorded and found on Mount Dulit and Mount Murud in Marudi District. The habitat on the Leiden isotype was described as mossy forest.

 

The Plants Description

 

The rhizome measure 2cm long. The pseudobulbs crowd along the rhizome and are shaped cylindrical. The pseudobulbs measure 0.6-1.5cm long and 0.3-0.4cm in diameter. The pseudobulbs are covered by three cataphylls while they are growing. The cataphylls disintegrate into persistent fibres as the pseudobulbs mature. The leaves are petiolate; the petiole measures 1.0-2.8cm long. The leaf blades are shaped narrowly linear-oblanceolate and have obtuse apices that are minutely apiculate. The leaf blades measure 8-16.5cm long and 0.3-0.5cm wide. The leaves are thin textured and have three distinct nerves. The leaves are thinly coriaceous and contain crystalline calcium oxalate bodies.

 

The Inflorescence

 

The inflorescence is synanthous and emerges from the apex of a mature pseudobulb. The peduncle is erect and measures 1.5-5cm long. The rachis is erect to gently curved and measures 8-17.5cm long. The rachis is quadrangular in cross-section. The flowers alternate distichously and are spaced 1-2mm apart. There are no non-floriferous bracts at the base of the rachis.

 

The Flowers

 

The flowers are greenish yellow; the tip of the column is brown. The sepals are concave and the petals slightly concave. The dorsal sepal is shaped oblong-lanceolate and has an acute apex. The dorsal sepal measures 2.5mm long and 0.9mm wide. The dorsal sepal has an entire margin and is three veined. The lateral sepals are shaped oblong-ovate and have acute or subacute, slightly falcate apices. The lateral sepals measure 2mm long and 1mm wide. The lateral sepals have entire margins and are three veined. The petals are shaped oblanceolate-ligulate and have acute, slightly falcate apices. The petals measure 2.2mm long and 0.6mm wide. The petals have entire margins and are 1-3 veined. The labellum is obscurely subquadrate basally; the labellum is narrowed at its middle and forms a triangular shape with an acuminate apex. The labellum measures 1.5mm long and 0.9mm wide. There is a prominent horseshoe shaped keel on the hypochile. The column is gently curved and measures 1.5mm long. The column foot is very small. The apical hood is shaped oblong to triangular and has an obtuse apex, the margin is entire. The stelidia grow upwards from the base of the column and terminate just below the column apex. The stelidia are shaped linear and have obtuse or acute apices.

 

Herbarium Specimens

 

Holotype

 

SING

 

 

Isotype

 

Royal Botanic Gardens, Kew (K)

 

Specimen K000078258

Specimen K000078255

 

National Herbarium Netherlands (L)

 

Specimen L0003777 (photo)

 

 

Other herbarium specimens

 

Royal Botanic Gardens, Kew (K)

 

Specimen K000078256 (photo) (unknown type material)

Specimen 60754.000

Specimen K000078257

 

AMES

 

I could not locate the specimen

 

Scent

 

Yes, a sweet scent

 

Flowering Season

 

Flowering plants have been collected in the wild during September and October.

 

Culture

 

I do not think this species is in cultivation

 

Similar Species

 

Dendrochilum dolichobrachium

Dendrochilum cupulatum (see this page for the differences)

 

Other Information

 

Carr considered this species to be allied to Dendrochilum gibbsiae, Dendrochilum dolichobrachium and Dendrochilum haslamii all in section Cruciformia. Jeffrey Wood (Wood 2001) agreed that there were similarities but said that the presence of a column foot meant placing this species in section Platyclinis. Wood said that molecular analysis will help clarify if it should or should not be included in section Cruciformia (Wood 2001).

 

The epithet refers to the labellum which is obscurely subquadrate basally, sub (not completely) lobus (a lobe).

 

Reference

 

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

 

World Checklist of Selected Plant Families. 24 May 2009. The Board of Trustees of the Royal Botanic Gardens, Kew. Published on the Internet; http://www.kew.org/wcsp/ accessed 24 May 2009.