Accepted name: Dendrochilum havilandii Pfitzer in H.G.A.Engler (ed.), Pflanzenr., IV, 50 II B 7: 107 (1907)

Subgenus – Platyclinis. Section – Platyclinis.


 
 

Synonyms

 

Dendrochilum hewittii J.J.Sm., Bull. Dép. Agric. Indes Néerl. 22: 14 (1909).

 

Origin in the Wild

 

Sarawak

 

Elevation in the Wild

 

100 – 400 metres

 

Habitat in the Wild

 

This species is found growing as an epiphyte or lithophyte. Within Sarawak it has been collected in the Bau District at the Bidi Cave and in the Bau Hills. There have been a few collections in the Samarahan District at Kuap. In the Kuching District it has been collected on Mount Siburan. Within the Serian District collections have been made on Serabu Hill and in the Marudi District in the Gunung Mulu National Park on the summit of Berar Hill.

 

Jeffrey Wood wrote (2001) that the habitat is lowland and hill forest on limestone, limestone rocks and cliffs in light shade.

 

The Plants Description

 

The pseudobulbs are crowded along the rhizome and are shaped cylindrical or terete to narrowly ovate. The pseudobulbs measure 4.5-9.0cm long and 0.5-1.0cm in diameter. The pseudobulbs are covered by 3-4 cataphylls while they are growing. The cataphylls disintegrate into persistent fibres as the pseudobulbs mature. The leaves are petiolate; the petiole measures 3.5-7.5cm long. The leaf blades are shaped narrowly elliptic to lanceolate-obovate and have obtuse to subacute apices. The leaf blades measure 11-28cm long and 2.0-3.5cm wide. The leaves are tough, coriaceous and have 5 distinct nerves. The leaf blades are shiny above and mat underneath.

 

The Inflorescence

 

The inflorescence is synanthous. The peduncle is erect and measures 12.5-28cm long. The rachis is slightly curved to curved and measures 10.5-16cm long. The flowers alternate distichously and are spaced 2-2.5mm apart. There is one non-floriferous bract at the base of the rachis. The bracts are white.

 

The Flowers

 

Jeffrey Wood wrote that the flowers are white to cream and fade to pale lemon-yellow or pale greenish (Wood 2001). The dorsal sepal is shaped linear-lanceolate and has a conical-acute apex that is reflexed. The dorsal sepal measures 7.3-8mm long and 1.5-1.7mm wide. The dorsal sepal has an entire margin and is three veined. The lateral sepals are shaped slightly obliquely linear-lanceolate and have conical-apiculate apices that are incurved. The lateral sepals measure 7-7.1mm long and 1.2-1.7mm wide. The lateral sepals have entire margins and are three veined. The petals are shaped linear-lanceolate and have acute apices that are somewhat concave and reflexed. The petals measure 6-7mm long and 1.1-1.4mm wide. The petals have entire margins and are three veined. The labellum is 3-lobed, versatile, strongly decurved at its middle, concave at its base, 3-veined and finely papillose. The labellum measures 4.6-4.7mm long and 1.4-1.5mm wide. The side lobes are erect or decurved, tiny, tooth-like and shaped subulate-falcate with acute apices. The mid-lobe is concave, shaped oblong-elliptic or oblong-rhomboid and has an obtuse to subacute apex. The margins are entire on the labellum. There are two short keels that run from the base of the hypochile and terminate just beyond the side lobes. There is a prominent nerve located between the two keels. The column is gently incurved and measures 2.5mm long. The column foot is prominent. The apical hood has a somewhat truncate dentate apex. The stelidia grow upwards from the middle of the column on each side of the stigmatic cavity. The stelidia equal or slightly exceed the apical hood. The stelidia are shaped linear-ligulate and have acute to acuminate apices. The stelidia measure 1.8-1.9mm long.

 

Herbarium Specimens

 

Holotype

 

Royal Botanic Gardens (K)

 

Specimen K000079111 (photo) (Syntype) (Dendrochilum hewittii)

Specimen K000079110 (photo)

Specimen K000079112 (photo) (Syntype) (Dendrochilum hewittii)

 

BO

 

Specimen (Dendrochilum hewittii)

 

 

Isotype

 

SING

 

 

Other herbarium specimens

 

Royal Botanic Gardens (K)

 

Specimen 54800.000

Specimen 60702.000

 

National Herbarium Netherlands (L)

 

Specimen L0269602

Specimen L0269603

Specimen L0269604

Specimen L0269605

 

SAR

 

SING

 

AMES

 

I could not locate this specimen

 

BO

 

E

 

MEL

 

W

 

Scent

 

I could find no record

 

Flowering Season

 

Flowering plants have been collected in the wild from August to December.

 

Culture

 

I do not think this species is in cultivation

 

Similar Species

 

Dendrochilum coccineum (not the flowers though)

 

Other Information

 

The epithet refers to George Haviland who collected the type. G. Haviland was a curator at the Sarawak Museum in Kuching.

 

Reference

 

BEAMAN, Teofila, WOOD, Jeffrey, BEAMAN, Reed, BEAMAN, John. 2001, Orchids of Sarawak, Natural History Publications Borneo, Kota Kinabalu, Malaysia.

 

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

 

World Checklist of Selected Plant Families. 15 July 2009. The Board of Trustees of the Royal Botanic Gardens, Kew. Published on the Internet; http://www.kew.org/wcsp/ accessed 15 July 2009.