Accepted name: Dendrochilum lacinilobum J.J.Wood & A.L.Lamb in J.J.Wood & P.J.Cribb, Check-list Orchids Borneo: 181 (1994).



Subgenus – Platyclinis. Section – Platyclinis.


 
 

Synonyms

 

None

 

Origin in the Wild

 

Sabah

 

Elevation in the Wild

 

900-1600 metres

 

Habitat in the Wild

 

Plants have been collected on Mount Anginon near Sapong, along the Keningau to Kimanis road, above the Kallang waterfall in Tenom District and at Ulu Apin Apin in the Crocker Range.

 

The plant’s habitat has been described as lower montane forest on sandstone and shale ridges (Wood 2001). Plants have been found growing in thick moss on tree trunks and branches.

 

The Plants Description

 

The pseudobulbs cluster along branching rhizomes that measure up to 8cm long. The pseudobulbs are shaped narrowly fusiform and measure 1.5-4.0cm long and 0.3-0.5cm in diameter. The pseudobulbs are covered by 3 cataphylls while they are growing. The cataphylls disintegrate into fibres as the pseudobulbs mature. The leaves are petiolate; the petiole measures 4.0-5.0cm long. The leaf blades are shaped linear to narrowly-elliptic, or ligulate-elliptic or oblong-elliptic and have obtuse and mucronate apices. The leaf blades measure 6.0-11.0cm long and 1.0-1.8cm wide. The leaves are thin-textured and have 5-7 distinct nerves along their length.

 

The Inflorescence

 

The inflorescence is synanthous and appears when the leaves have almost fully expanded. The peduncle is gently curved and measures 15.0-16.0cm long. The rachis is gently curved and measures 10.0-13.0cm long. The rachis is quadrangular in cross-section. The peduncle is a pale green colour and the rachis is yellowish. The flowers alternate distichously and are spaced 2.0-2.5mm apart. There is 1 non floriferous bract at the base of the rachis.

 

The Flowers

 

The flowers are creamy white with the labellum sometimes pale green to lemon, the keels are yellowish cinnamon or ochre and the column is pink (Wood 2001). The dorsal sepal is shaped oblong and has a subacute or acute apex.  The dorsal sepal measures 4.5mm long and 1.5mm wide. The dorsal sepal is three veined and has an entire margin. The lateral sepals are shaped obliquely oblong to oblong-elliptic and have acute apices. The lateral sepals measure 4.5mm long and 1.6mm wide. The lateral sepals are three veined and have entire margins. The petals are shaped oblong and have acute apices. The petals measure 4.0mm long and 1.1-1.2mm wide. The petals are three veined and have minutely erose-papillose margins. The labellum is stipitate to the column foot by a tiny claw and 3-lobed. The labellum measures 3.0mm long when it’s flattened. The side lobes are spreading, shaped oblong and have irregularly laciniate margins. The mid-lobe is strongly decurved, shaped ovate-elliptic and has a rounded or subacute apex. The mid-lobe is minutely toothed at its base and has a minutely papillose surface. There are two flange like basal keels that are incurved and meet. The keels terminate at the base of the mid-lobe. There are two keel like ridges that start at the base of the mid-lobe and terminate close to the labellum apex. The column is slightly incurved and measures 2.0mm long. The column foot is prominent. The apical hood is elongated, shaped ovate and has a rounded apex with entire margins. The stelidia grow upwards from the middle of the column and do not reach the column apex. The stelidia are shaped oblong and have subacute apices.

 

Herbarium Specimens

 

Holotype

 

Royal Botanic Gardens Kew (K)

 

Specimen K000079119 (photo)

Specimen K000079120 (photo)

Specimen 72884.000

 

Isotype

 

NA

Other herbarium specimens

 

Royal Botanic Gardens Kew (K)

 

Specimen 49588.000

Specimen 56782.000

 

National Herbarium Netherlands (L)

 

Specimen L0322570

Specimen L0322571

Specimen L0322573

 

Scent

 

Yes, sweetly scented.

 

Flowering Season

 

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

 

Culture

 

I do not think this species is in cultivation

 

Similar Species

 

Dendrochilum gramineum

Dendrochilum kamborangense

 

Other Information

 

This species differs from Dendrochilum gramineum by its laciniate side lobe margins, two flange like basal keels that are 0.4mm wide, stelidia that grow opposite the stigmatic cavity, broader petals and a slightly broader labellum. This species differs from Dendrochilum kamborangense by its laciniate side lobe margins, two flange like basal keels that are 0.4mm wide, stelidia that grow opposite the stigmatic cavity, smaller flowers and narrower petals and labellum.

 

The epithet refers to the distinctive side lobes and their margins.

 

Reference

 

WOOD, Jeffrey. 1997, Orchids of Borneo volume 3. The Sabah Society, Kota Kinabalu, Malaysia.

 

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