Accepted name: Dendrochilum galeatum H.A.Pedersen, Nordic J. Bot. 15: 396 (1995 publ. 1996)

Subgenus – Platyclinis. Section – Platyclinis.


 
 

Synonyms

 

None

 

Origin in the Wild

 

Flores

 

Elevation in the Wild

 

1640-1800 metres

 

Habitat in the Wild

 

The type was collected on Flores at Lusang and Mangarei, Ruteng.

 

The Plants Description

 

The pseudobulbs cluster along a rhizome and are shaped ellipsoid to fusiform. The pseudobulbs measure 1.3-1.8cm long and 0.4-0.7cm 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 leaves are petiolate, the petiole measures 0.4-2.8cm long. The leaf blade is shaped linear-lanceolate and has an acute apex. The leaf blades measure 3-10.6cm long and 0.6-1.3cm wide. The leaf margins are entire, the leaves are thin textured and have 5 distinct nerves.

 

The Inflorescence

 

The inflorescence is synanthous. The peduncle is curved and measures 6.5-12.5cm long. The rachis is nodding to pendent and measures 6.2-9.3cm long. The flowers alternate distichously and are spaced 3-4mm apart.  There are 1-2 non floriferous bracts on the rachis.

 

The Flowers

 

The flowers are widely spreading. The dorsal sepal is shaped narrowly elliptic-oblong and has an acute apex. The dorsal sepal measures 5-6.1mm long and 1.9-2.6mm wide. The dorsal sepal has an entire margin and is three veined, with a slight ridge/keel. The lateral sepals are shaped narrowly ovate and have subacute apices. The lateral sepals measure 4.7-5.7mm long and 2.4-2.7mm wide. The lateral sepals have entire margins and are three veined with a slight ridge/keel. The petals are shaped narrowly elliptic-oblong and have obtuse to acute apices. The petals measure 4.2-5.4mm long and 1.7-2mm wide. The petals have finely erose margins and are three veined. The labellum is elastically attached to the column, entire and pendent to porrect. The labellum is shaped pandurate and has a rounded to subacute apex. The labellum measures 3.9-4.7mm long and 2.6-2.9mm wide. The labellum is 3-veined. There are two raised keels on the outermost nerves; some flowers have a small keel in the middle as well. The margin on the labellum is irregular. The column is suberect, incurved and measures 2.7-3.1mm long. The apical hood has a rounded apex and irregular dentate margin, the apical hood exceeds the anther cap. The stelidia grow from the top of the column and are equal to the column apex. The stelidia are level with the anther cap and make the top of the column look like a helmet structure. The stelidia are shaped falcately linear and have acute apices.

 

Herbarium Specimens

 

Holotype

 

National Herbarium Netherlands, Leiden (L)

 

Specimen L0058437 (photo)

 

Other herbarium specimens

 

National Herbarium Netherlands, Leiden (L)

 

Specimen L0322485

Specimen L0322486

 

Scent

 

I could find no record

 

Flowering Season

 

The type was collected in flower during April.

 

Culture

 

I do not think this species is in cultivation

 

Similar Species

 

Dendrochilum anomalum

 

Other Information

 

Henrik Pedersen wrote that this species is related to Dendrochilum anomalum from Borneo but differs by its narrower leaves, entire labellum and smooth column surface.

 

This is the only Dendrochilum that is endemic to the Lesser Sunder Islands

 

The epithet refers to the helmet like structure of the stelidia and apical hood.

 

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.

 

World Checklist of Selected Plant Families. 25 September 2008. The Board of Trustees of the Royal Botanic Gardens, Kew. Published on the Internet; http://www.kew.org/wcsp/ accessed 25 September 2008.