Accepted name: Dendrochilum auriculilobum J.J.Wood in J.J.Wood & P.J.Cribb, Check-list Orchids Borneo: 165 (1994)


Subgenus – Acoridium. Section – Acoridium.

 

 

 

 

Synonyms

 

None

 

Origin in the Wild

 

Sabah

 

Elevation in the Wild

 

1700 metres

 

Habitat in the Wild

 

This species grows in low and open mossy ridge forest with a dense undergrowth of bamboo and rattan palm. A comment on the holotype specimen state it was growing as a terrestrial.

 

This species has only been collected a few times from sites in South West Sabah. Collections have been made from Sipitang District, Long Pa Sia and the Ruran headwaters Sungai.

 

The Plants Description

 

This terrestrial plant is a medium sized Dendrochilum. The pseudobulbs are shaped cylindrical and measure 2.8-3cm long and 0.6-0.8cm in diameter. The pseudobulbs are spaced 2-3cm apart along the rhizome. The leaves are petiolate; the petiole measures 5-6cm long. The leaf blades are shaped linear-lanceolate and have acute apices. The leaf blades measure 20-25cm long and 1.2-1.3cm wide. The leaf is thin textured.

 

The Inflorescence

 

The peduncle is erect and measures 20-25cm long. The rachis is curved and measures up to 18cm long. The flowers are spaced 2.2.5mm apart. There are up to 6 imbricate non-floriferous bracts at the base of the rachis. The flowers open from the proximal part of the rachis.

 

The Flowers

 

The flowers are pale green and the labellum is green. The sepals and petals spread widely. The dorsal sepal is shaped ovate-elliptic and has an acute apex. The dorsal sepal measures c4mm long and 1.7-1.8mm wide.  The dorsal sepal is three veined and has an entire margin. The lateral sepals are shaped ovate and have acute apices. The lateral sepals measure 4mm long and 2.1mm wide. The lateral sepals are three veined and have entire margins. The petals are shaped elliptic and have acute apices. The petals measure 3.9mm long and 1.7-1.8mm wide. The petals are three veined and have entire margins. The labellum is concave and three lobed. The labellum measures 2.5mm long and 3mm across the side lobes. The side lobes are auriculate, and have acute apices. The mid-lobe is shaped oblong-ovate and has an obtuse apex; the centre of the apex has a small mucro. The labellum is three veined and has mostly entire margins; the margins are irregular from the base to the apex of the side lobes. There is a transverse basal ridge that 'cuts' across the veins. The column is shaped oblong and its apex is entire. The column measures 0.8-1mm long. There are no stelidia or apical hood on the column.

 

Herbarium Specimens

 

Holotype

 

National Herbarium Netherlands, Leiden (L)

 

Specimen L0052489

 

Isotype

 

Kew Botanical Gardens (K)

 

Specimen K000078143

Specimen 60399.000

Specimen K000078144

 

Other herbarium specimens

 

Scent

 

Yes, the Kew and Leiden specimens both state that this species is fragrant.

 

Flowering Season

 

Flowering plants have been collected in the wild during December.

 

Culture

 

I do not think this species is in cultivation

 

Similar Species

 

Dendrochilum hologyne

 

Additional Comments

 

Jeffery Wood writes that this species is similar to Dendrochilum hologyne which is also found in the same area of Sabah. Dendrochilum auriculilobum has shorter and thicker pseudobulbs, laxer inflorescences, larger flowers and labellum with auriculate side lobes.

 

The epithet refers to the 'ear like' shaped side lobes.

 

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. 22 August 2008. The Board of Trustees of the Royal Botanic Gardens, Kew. Published on the Internet; http://www.kew.org/wcsp/ accessed 22 August 2008.