Accepted name: Dendrochilum johannis-winkleri J.J.Sm., Mitt. Inst. Allg. Bot. Hamburg 7: 36 (1927)

Subgenus – Platyclinis. Section – Platyclinis.


 
 

Synonyms

 

None

 

Origin in the Wild

 

Brunei and Kalimantan

 

Elevation in the Wild

 

800-1500 metres

 

Habitat in the Wild

 

Jeffrey Wood wrote that this plant is found in lower montane forest. Nothing else is recorded on its habitat. Collections have been made on Mount Retak and Tudal Hill in Brunei’s Temburong District. In Kalimantan this plant has been collected in Kalimantan Barat on Tilung Hill.

 

The Plants Description

 

This species is an epiphyte. The rhizome branches and can measure up to 3cm long. The pseudobulbs grow along the rhizome and are shaped oblong-ovoid. The pseudobulbs measure 0.8-1cm long and 0.4-0.5cm in diameter. The pseudobulbs are covered by 3 cataphylls while they are growing. The cataphylls disintegrate into persistent fibres as the pseudobulbs mature. The leaves are petiolate; the petiole measures 0.6-1.4cm long. The leaf blades are shaped linear-subspathulate, sometimes broadest toward their apex. The leaf blades have rounded apices; the apices are equally and shallowly retuse. The leaf blades measure 4.75-11cm long and 0.55-0.8cm wide. The leaves have 3 distinct nerves.

 

The Inflorescence

 

The inflorescence is synanthous. The peduncle is erect and measures 8.5-10cm long. The rachis is erect to curving and measures 6cm long. The rachis is quadrangular in cross-section. The flowers alternate distichously and are spaced 2mm apart. There are 1 or no non-floriferous bracts at the base of the rachis.

 

The Flowers

 

The flowers are greenish-white. The sepals are concave and the petals slightly concave. The dorsal sepal is shaped oblong and has a subacute or acute apex. The dorsal sepal measures 4mm long and 1.5mm wide. The dorsal sepal has an entire margin and is three veined; the margin is sometimes suberose at its apex. The lateral sepals are shaped obliquely subovate-oblong and have acute, sometimes somewhat falcate apices. The lateral sepals measure 3.7-3.8mm long and 1.5mm wide. The laterals have entire margins and are three veined. The petals are shaped obliquely oblong and have acute, sometimes somewhat falcate apices. The petals measure 3.2-3.3mm long and 1.2-1.3mm wide. The petals have minutely erose margins and are three veined. The labellum is obscurely 3-lobed and clawed at its base. The labellum measures 2.2mm long and 1mm wide across the side lobes. The side lobes are obscure and have rounded apices. The margins on the side lobes have erose margins. The mid-lobe is shaped oblong-trullate and has a subacute to acute apex. There are 3 papillose ridges that run most of the labellum’s length; the ridges join at the base of the labellum. The column is gently curved and measures 1.7-1.8mm long. The column foot is incurved. The apical hood is rounded or retuse and minutely papillose. The stelidia grow upwards from the middle of the column and exceed the column apex. The stelidia are shaped obliquely linear-oblong and have obtuse apices. The stelidia measure 2mm long and are minutely papillose at their apices.

 

Herbarium Specimens

 

Holotype

 

HBG

 

 

Isotype

 

NA

 

 

Other herbarium specimens

 

Royal Botanic Gardens Kew (K)

 

Specimen 60715.000

Specimen 60707.000

 

National Herbarium Netherlands (L)

 

I could not locate the specimen

 

BRUN

 

Scent

 

I could find no record.

 

Flowering Season

 

Flowering plants have been collected in the wild during February and October.

 

Culture

 

I do not think this species is in general cultivation. The National Herbarium in the Netherlands has a specimen in their Hortus Botanicus.

 

Similar Species

 

Dendrochilum simile

 

Other Information

 

J.J. Smith wrote that this species has an affinity to Dendrochilum simile. Jeffrey Wood wrote that this species is distinctive amongst Bornean plants because it has leaves widest at their apex and subspathulate.

 

This species is only known from the type collection and another collection from Brunei.

 

The epithet honours the collector of the type, Professor Hans Winkler.

 

Reference

 

WOOD, Jeffrey. 1997, Orchids of Borneo volume 3. The Sabah Society, Kota Kinabalu, Malaysia.

 

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

 

World Checklist of Selected Plant Families. 26 April 2009. The Board of Trustees of the Royal Botanic Gardens, Kew. Published on the Internet; http://www.kew.org/wcsp/ accessed 26 April 2009.