Accepted name: Dendrochilum quinquecallosum H.A.Pedersen, Orchid Rev. 115: 223 (2007)

Subgenus – Acoridium. Section – Convoluta.


 
 
 

Synonyms

 

None

 

Origin in the Wild

 

Luzon.

 

Elevation in the Wild

 

Unknown

 

Habitat in the Wild

 

Jim Cootes wrote that this species is found in the central mountainous regions of Nueva Vizcaya and Nueva Ecija (Cootes pers comm).

 

The Plants Description

 

This is a small species, the pseudobulbs cluster along the rhizome. The roots grow from the rhizome and branch. The pseudobulbs are shaped fusiform and measure 2-4.1cm long and 0.3-0.6cm wide. The pseudobulbs are widest at their base. The pseudobulbs are covered by three cataphylls while they are growing. The cataphylls disintegrate into persistent fibres when the pseudobulbs mature. The leaves are convolute and petiolate; the petiole measures 0.6-1.4cm long. The leaf blades are shaped oblanceolate to linear-lanceolate and have acute to acuminate apices. The leaf blades measure 3.8-7.6cm long and 0.6-1.2cm wide. The leaves have five distinct nerves; the lateral nerves are 0.5-1mm from the leaf edge.

 

The Inflorescence

 

The inflorescence is synanthous. The peduncle is suberect and measures 5cm long. The rachis is nodding and measure 3.2-3.8cm long. The flowers gently twist around the rachis and are spaced 1mm part. There are 1-3 non-floriferous bracts on the inflorescence. The flowers open from the proximal section of the rachis.

 

The Flowers

 

The description below is based on Pedersen’s description in 2007.

 

The colour is cream. The flower tepals are one veined. The dorsal sepal is shaped lanceolate-oblong and has a subacuminate apex. The dorsal sepal measures 1.7-1.9mm long and 0.6-0.7mm wide. The dorsal sepal is one veined and has an entire margin. The lateral sepals are shaped obliquely-ovate and have acuminate apices. The lateral sepals measure 1.5-1.7mm long and 0.8-0.9mm wide. The lateral sepals are one veined and have entire margins. The petals are shaped linear-lanceolate measuring 1.4-1.5mm long and 0.4-0.5mm wide. The labellum is 3-lobed measuring 1-1.1mm long and 1.3-1.5mm wide when spread out. The labellum is 3 veined and glabrous. The labellum has two obliquely pyramidal lateral calli and a smaller median callus. The side lobes are erect and shorter than the mid lobe. The mid lobe trapezoid-reniform, broadly retuse, minutely mucronate, entire to somewhat irregular along the margin. The column is straight or slightly incurved 0.5-0.6mm long. There is no steilda, apical hood or column foot.

 

Herbarium Specimens

 

I have not been able to locate a link to a herbarium specimen

 

Scent

 

Not known

 

Flowering Season

 

Not known

 

Culture

 

This species is in cultivation in Europe and Australia.

 

Additional Comments

 

This species was described from a specimen in the cultivation of Richard Warren in the UK.

 

The epithet refers to the five calli on the labellum.

 

This species is similar to Dendrochilum curranii but differs by its 1 veined sepals, the 5 calli on its labellum and the mid lobe being longer than the side lobes.

 

Reference

 

PEDERSEN, Henrik. 2007. Changes to Dendrochilum, 2007, The Orchid Review, Vol 115 p220-226

 

World Checklist of Selected Plant Families. 30 August 2008. The Board of Trustees of the Royal Botanic Gardens, Kew. Published on the Internet; http://www.kew.org/wcsp/ accessed 30 August 2008.