Accepted name: Dendrochilum flexuosum H.A.Pedersen, Nordic J. Bot. 15: 383 (1995 publ. 1996)



Subgenus – Platyclinis. Section – Platyclinis.


 
 

Synonyms

 

None

 

Origin in the Wild

 

Visayas and Mindanao

 

Elevation in the Wild

 

c968 metres

 

Habitat in the Wild

 

Within the Visayas islands this species has been recorded on Western Samar on Mount Concord (Pedersen writes that the ID is uncertain). On Mindanao this species has been collected in Surigao del Norte Province on Mount Kabatuan.

 

The Plants Description

 

The pseudobulbs cluster on a short rhizome and are shaped ovoid to obpyriform. The pseudobulbs measure 0.4-0.8cm long and 0.3-0.6cm in diameter. The pseudobulbs are covered with c4 cataphylls when they are growing; the cataphylls disintegrate into persistent fibres as the pseudobulbs mature. The leaves are petiolate; the petiole measures 0.1-0.6cm long. The leaf blades are shaped linear and have obtuse apices. The leaf blades measure 2.5-5.6cm long and 0.3-0.4cm wide. The blades are thin-textured and have three distinct nerves.

 

The Inflorescence

 

The inflorescence is synanthous and appears with the new growth. The peduncle is suberect to somewhat curved and measures 6.6-7.4cm long. The rachis is nodding and measures 3.1-3.4cm long. The flowers alternate distichously and are spaced 3.0-4.0mm apart. There are 3-5 appressed non floriferous bracts at the base of the rachis.  The flowers open from the proximal section of the rachis.

 

The Flowers

 

Between six and eight flowers grow on an inflorescence (Pedersen 1997). The flowers are light salmon pink (Pedersen 1997). The sepals and petals spread widely. The dorsal sepal is shaped oblanceolate and has an acute apex. The dorsal sepal measures c4.5mm long and c1.4mm wide. The dorsal sepal is three veined and has a quite entire margin. The lateral sepals are shaped linear-lanceolate and have acute apices. The lateral sepals measure c5.2mm long and c1.6mm wide. The lateral sepals are three veined and have quite entire margins. The petals are shaped elliptic and have obtuse apices. The petals measure c3.9mm long and c1.7mm wide. The petals are three veined and have finely erose margins. The labellum is easily versatile, porrect and slightly 3-lobed. The labellum measures c4.5mm long and c2.2mm wide. The labellum is three veined and has erose margins from the base of the labellum to the apices of the side lobes the rest of the margin is entire. The side lobes are minute, flat, shaped obliquely triangular and have subacute apices. The mid-lobe is shaped broadly oblong-elliptic and has a rounded apex. There are three keels that interconnect to join an M shaped transverse ridge at the base of the labellum. The column is erect; slightly incurved and measures 3.0-3.3mm long. The apical wing is prolonged into a truncate apex and has a quite entire margin. The apical wing distinctly exceeds the anther cap. The column foot is short. The stelidia grow upwards from the middle of the column and are shorter than the column apex, reaching the rostellum. The stelidia are shaped linear and have obtuse apices.

 

Herbarium Specimens

 

Holotype

 

PNH

 

Other herbarium specimens

 

National Herbarium Netherlands, Leiden (L)

 

Specimen L0322479

 

Scent

 

I could find no record.

 

Flowering Season

 

Flowering plants have been collected during March and possibly May.

 

Culture

 

I do not think this species is in cultivation

 

Similar Species

 

Dendrochilum malindangense

 

Other Information

 

There has only been one positively identified collection of this species from Mindanao. Pedersen wrote that the other collection cited from Western Samar could be referred to this species (Pedersen 1997).

 

Henrik Pedersen wrote that this species is closest to Dendrochilum malindangense based on its overall flower morphology but is a much smaller plant and has a different habit (Pedersen 1997).

 

Reference -

 

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

 

World Checklist of Selected Plant Families. 27 July 2009. The Board of Trustees of the Royal Botanic Gardens, Kew. Published on the Internet; http://www.kew.org/wcsp/ accessed 27 July 2009.