Accepted name: Dendrochilum globigerum (Ridl.) J.J.Sm., Recueil Trav. Bot. Néerl. 1: 64 (1904)



Subgenus – Platyclinis. Section – Platyclinis.


 
 

Synonyms

 

Platyclinis globigera Ridl., J. Linn. Soc., Bot. 31: 266 (1896).

Acoridium globigerum (Ridl.) Rolfe, Orchid Rev. 12: 220 (1904).

Platyclinis minima Ridl., J. Straits Branch Roy. Asiat. Soc. 49: 30 (1908).

Platyclinis minor Ridl., J. Straits Branch Roy. Asiat. Soc. 49: 30 (1908).

Dendrochilum minimum (Ridl.) Merr., J. Straits Branch Roy. Asiat. Soc., Spec. No.: 148 (1921).

Dendrochilum minus (Ridl.) Merr., J. Straits Branch Roy. Asiat. Soc., Spec. No.: 148 (1921).

 

Origin in the Wild

 

Sarawak

 

Elevation in the Wild

 

700-900 metres

 

Habitat in the Wild

 

Within Sarawak specimens have been collected on Mount Serapi, Mount Santubong, Mount Matang, Mount Penrissen, Mount Raya and in the Sri Aman District at Tiang Laju Undup.

 

The habitat has been described as Hill and lower montane forest often on sandstone substrate. This species has also been found in low cloud forest where it has been seen on mossy rocks, at the base of small shrubs, on tree branches and tree trunks. This species is common along ridges (Wood 2001).

 

The Plants Description

 

The pseudobulbs cluster on a rhizome that can reach a length of 10cm. The pseudobulbs are shaped ovoid or oblong-ovoid. The pseudobulbs measure 0.5-1.5cm long and 0.6-0.8cm 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 0.7-2.5cm long. The leaf blades are shaped narrowly elliptic and have obtuse apices. The leaf blades measure 3.0-9.0cm long and 0.6-1.5cm wide. The leaves are constricted below the apex, thin textured and have 5 distinct nerves.

 

The Inflorescence

 

The peduncle is erect and measures 3.5-10.0cm long. The rachis is quadrangular in cross section, pale orange, gently curved and measures 2.0-5.0cm long. The flowers alternate distichously and are spaced 2.0-3.0mm apart. There is one appressed non-floriferous bract at the base of the rachis.

 

The Flowers

 

Between 8 and 20 flowers grow on an inflorescence (Wood 2001). The sepals and petals are a creamy white colour; the labellum is brown with a whitish base and margins. The anther cap and column apex are brown. The dorsal sepal is carinate, shaped narrowly-elliptic and has an acuminate apex. The dorsal sepal measures 5.0-6.0mm long and 1.0-1.5mm wide. The dorsal sepal is three veined and has an entire margin. The lateral sepals are carinate, shaped narrowly elliptic and have acuminate apices. The lateral sepals measure 6.0mm long and 1.1-1.5mm wide. The lateral sepals are three veined and have entire margins. The petals are shaped oblong-elliptic or subspathulate and have obtuse apices. The petals measure 2.4-2.5mm long and 1.0mm wide. The petals are one veined; rarely two veined and have entire margins. The labellum is narrowly clawed, porrect, decurved, 3 veined and entire. The labellum measures 2.7-2.8mm long and 1.0-1.5mm wide. The labellum has entire margins. The labellum is shaped oblong to subpandurate and has an obtuse apex. There are three low keels that terminate just over half way along the length of the labellum. The column is gently curved and measures 1.8-2.0mm long. The column foot is prominent. The apical hood is shaped ovate and has an obtuse apex with a denticulate margin. The stelidia grow upwards from the middle of the column and are slightly shorter than the column apex. The stelidia are shaped falcate and have triangular-acuminate apices.

 

Herbarium Specimens

 

Holotype

 

SING

 

Platyclinis minor

Platyclinis minima

 

Isotype

 

Royal Botanic Gardens Kew (K)

 

Specimen K000079106

Specimen K000079105

 

BM

 

Platyclinis minor

 

Lectotype

 

Royal Botanic gardens Kew (K)

 

Specimen K000079104

 

Syntype

 

SAR

 

Other herbarium specimens

 

National Herbarium Netherlands, Leiden (L)

 

Specimen L0269575

Specimen L0269576

Specimen L0269577

 

Royal Botanic Gardens Kew (K)

 

Specimen 32668.000

Specimen 3031.000

Specimen 60419.000

Specimen 60420.00

 

FI

 

G

 

W

 

HBG

 

SAR

 

SING

 

AAU

 

E

 

BO

 

Scent

 

Yes, a sweet fragrance.

 

Flowering Season

 

Flowering plants have been collected in the wild during February, March, April, May, June and November. The collections indicate that it is most often seen in flower from March to May.

 

Culture

 

I do not think this species is in cultivation

 

Similar Species

 

None

 

Other Information

 

The epithet refers to the pseudobulbs.

 

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. 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.