Accepted name: Dendrochilum quisumbingianum H.A.Pedersen, Nordic J. Bot. 15: 389 (1995 publ. 1996)

Subgenus – Platyclinis. Section – Platyclinis.


 
 

Synonyms

 

None

 

Origin in the Wild

 

Mindanao

 

Elevation in the Wild

 

1940 metres

 

Habitat in the Wild

 

This species was collected on the summit of Mount Hilonghilong in Agusan del Norte Province, Mindanao. The plant has been found in mossy forest.

 

The Plants Description

 

The pseudobulbs cluster along a short rhizome and are shaped semifusiform to slenderly obpyriform. The pseudobulbs measure 1.4-2.6cm long and 0.3-0.6cm in diameter. The pseudobulbs are covered by 4-5 cataphylls while they are growing. The cataphylls disintegrate into persistent fibres as the pseudobulbs mature. The leaf is petiolate; the petiole measures 3.2-8.0cm long. The leaf blades are shaped narrowly linear and have acute apices. The leaf blades measure 16.3-27.0cm long and 0.3-0.4cm wide. The leaves are rigid and have three distinct nerves.

 

The Inflorescence

 

The inflorescence is synanthous. The peduncle is suberect and measures 19.0-28.0cm long. The rachis is probably suberect and measures 3.3-4.9cm long. The flowers alternate distichously and are spaced 3.0-4.0mm apart. There are c4 non-floriferous bracts at the base of the rachis. The flowers supposedly open from the proximal part of the rachis.

 

The Flowers

 

Between 8 and 10 flowers grow on the inflorescence; the flowers are yellow (Pedersen 1995). The sepals and petals spread widely. The dorsal sepal is shaped lanceolate and has an acuminate apex. The dorsal sepal measures 8.0-8.4mm long and 2-2.4mm wide. The dorsal sepal is three veined and has a quite entire margin. The lateral sepals are shaped lanceolate and have acuminate apices. The lateral sepals measure 8.0-8.5mm long and 2.4-2.6mm wide. The lateral sepals are three veined and have quite entire margins. The petals are shaped elliptic and have acuminate apices. The petals measure 6.9-7.1mm long and 2.4-2.8mm wide. The petals are three veined and have finely erose to nearly entire margins. The labellum is easily versatile, porrect and 3-lobed. The labellum measures 5.4-5.6mm long and 2.7-3mm wide. The side lobes are suberect, shaped obliquely linear-triangular and have acuminate apices. The mid-lobe is shaped broadly elliptic and has an acuminate apex. The mid lobe is finely papillose, three veined and has a quite entire margin; the lateral margin is upcurved. There are three interconnected keels, the two lateral keels are located along the lateral nerves and are longer than the median one. The keels run from the base to the middle of the labellum. The column is sub-erect, strongly incurved and measures 3.0-3.3mm long. The apical wing is prolonged into a truncate apex with an entire margin. The apical wing distinctly exceeds the anther cap. The column foot is short. The stelidia grow upwards from the base of the column and equal than the column apex. The stelidia are straight. The stelidia are shaped narrowly linear and have acute apices.

 

Herbarium Specimens

 

Holotype

 

PNH

 

 

Isotype

 

AMES

 

Specimen 90561 (photo)

 

 

Scent

 

I could find no record

 

Flowering Season

 

The holotype was collected in flower during April.

 

Culture

 

I do not think this species is in cultivation

 

Similar Species

 

Dendrochilum mucronatum

 

Other information

 

Henrik Pedersen wrote that this species is related to Dendrochilum mucronatum from Sarawak but differs by the peduncle being longer than its rachis, the narrowly linear stelidia and the many nerved bract.

 

Reference

 

PEDERSEN, Henrik. 1995, Thirteen new species of Dendrochilum (Orchidaceae), a new record from Burma, and a checklist of the genus in East Malesia. Nord. J. Bot 15:381-402. Copenhagen, Denmark.

 

PEDERSEN, Henrik. 1997, The Genus Dendrochilum (Orchidaceae) in the Philippines – A Taxonomic Revision. Opera Botanica, Denmark

 

World Checklist of Selected Plant Families. 05 September 2008. The Board of Trustees of the Royal Botanic Gardens, Kew. Published on the Internet; http://www.kew.org/wcsp/ accessed 05 September 2008.