Accepted name: Dendrochilum flos-susannae J.J.Wood, Orchid Rev. 105: 142 (1997).



Subgenus – Platyclinis. Section – Platyclinis.


 
 
 

Synonyms

 

None

 

Origin in the Wild

 

Sarawak

 

Elevation in the Wild

 

200 metres

 

Habitat in the Wild

 

This species was collected in Sarawak in the Lanjak-Entimau Park, along the Ensirieng River.

 

The habitat has been described as primary mixed dipterocarp forest (Wood 2001).

 

The Plants Description

 

I could not find a description of the pseudobulbs or leaves. J.J. Smith wrote that the habit is similar to Dendrochilum gracile (Wood 2001).

 

The Inflorescence

 

The peduncle is subpendent and measures up to 21.5cm long. The rachis is quadrangular is cross section, pendent and measures 13.0-28.0cm long. The flowers alternate distichously and are spaced 5.0-12.0mm apart. There is one non-floriferous bract at the base of the rachis.

 

The Flowers

 

Between 16 and 32 flowers grow on an inflorescence (Wood 2001). The sepals and petals are light brownish olive; the labellum is light orange at the base. The side lobes are chocolate brown; the mid-lobe is light brownish olive with chocolate brown coloured keels separated by an orange line. The dorsal sepal is concave basally, shaped lanceolate and has an acuminate reflexed apex. The dorsal sepal measures 14.0-17.0mm long and 3.8-3.9mm wide. The dorsal sepal is three veined and has an entire margin. The lateral sepals are concave basally, shaped obliquely lanceolate and have acuminate reflexed apices. The lateral sepals measure 13.0-17.0mm long and 3.0-4.0mm wide. The lateral sepals are three veined and have entire margins. The petals are shaped lanceolate and have acute apices. The petals measure 12-15mm long and 3.0-3.1mm wide. The petals are three veined and often have slightly irregular margins. The petals have a few scattered minute trichomes basally. The labellum is stipitate to the column by a long claw, porrect, concave and 3-lobed. There are three prominent veins on the labellum. The labellum measures 11.0-13.8mm long and 3.8-4.0mm wide. The side lobes are erect to spreading, shaped obliquely triangular and have acuminate apices. The upper margins of the side lobes are serrate to erose. The mid-lobe is shaped rhomboid from a liner-oblong claw and has an acute apex. The mid-lobe margin is minutely erose. There are two keels that are not joined at the base of the labellum. The keels terminate half way along the mid-lobe of the labellum and nearly join where they terminate. The keels are separated by a deep groove that widens closer to the apex; the groove creates a keel on the underside of the labellum. The column is gently curved and measures 6.0-7.0mm long. The column foot is prominent. The apical hood is elongated into an oblong shaped hood and has an irregular margin. The stelidia grow upwards from the centre of the column and are shorter than the apical hood. The stelidia measure 2.0-2.9mm long. The stelidia are shaped narrowly falcate and have acute apices.

 

Herbarium Specimens

 

Holotype

 

National Herbarium Netherlands (L)

 

I could not locate the specimen

 

Isotype

 

Royal Botanic Gardens Kew (K)

 

Specimen 63264.000

 

Other herbarium specimens

 

Royal Botanic Gardens Kew (K)

 

Specimen K000078908 (drawing)

Specimen K000078907 (drawing)

 

Scent

 

Yes, a slight fragrance.

 

Flowering Season

 

A flowering plant has been collected in the wild during January.

 

Culture

 

I do not think this species is in cultivation

 

Similar Species

 

Dendrochilum megalanthum

Dendrochilum gracile

Dendrochilum oxylobum

 

Other Information

 

This species is the largest flowered Dendrochilum on Borneo. This species differs from the Sumatran Dendrochilum megalanthum by its larger flowers, rhomboid shaped mid lobe and oblong claw. This species differs from Dendrochilum gracile and Dendrochilum oxylobum by the larger flowers. The keels do not unite basally to form an M shape as they do in Dendrochilum gracile.

 

The name honours Susanne Stuart-Smith who has drawn many Dendrochilum species particularly for the Dendrochilum of Borneo publication.

 

Reference

 

WOOD, Jeffrey. Dendrochilum of Borneo, 2001. Natural History Publications (Borneo), Malaysia.

 

World Checklist of Selected Plant Families. 24 July 2009. The Board of Trustees of the Royal Botanic Gardens, Kew. Published on the Internet; http://www.kew.org/wcsp/ accessed 24 July 2009.