Accepted name: Dendrochilum longilabre (Ames) Pfitzer in H.G.A.Engler (ed.), Pflanzenr., IV, 50 II B 7: 99 (1907)

Subgenus – Platyclinis. Section – Mindanaorchis.


 
 
 

Synonyms

 

Acoridium longilabre Ames, Proc. Biol. Soc. Wash. 19: 152 (1906).

 

Origin in the Wild

 

Mindanao

 

Elevation in the Wild

 

1700 metres

 

Habitat in the Wild

 

Specimens have been collected from Mount Apo and Mount McKinley in Davao del Sur Province and from the Katanglad Mountains in Bukidnon Province.

 

E.B. Copeland recorded this species as growing solitary or on mossy trees on Mount Apo. Elmer's field notes described the plant as growing in dense clumps on moss covered tree trunks 10 feet above the humus covered moist soil of dense woods.

 

The Plants Description

 

The pseudobulbs cluster on a short rhizome. The pseudobulbs are shaped fusiform to pyriform. The pseudobulbs measure 1.5-3.1cm long and 0.4-1.0cm in diameter. The pseudobulbs are covered by c3 cataphylls while they are growing. The cataphylls soon disintegrate into persistent fibres as the pseudobulbs mature. The leaves are petiolate; the petiole measures 3.8-14.8cm long. The leaf blades are shaped narrowly lanceolate and have obtuse, often minutely mucronate apices. The leaf blades measure 12.5-32.3cm long and 1.1-3.2cm wide. The leaves are thin textured and have 7-9 distinct nerves.

 

The Inflorescence

 

The inflorescence is synanthous. The peduncle is finely setose, suberect and measures 14.5-37.6cm long. The rachis is finely setose, suberect to nodding and measures 2.5-8.3cm long. The flowers alternate distichously and are spaced c1.5mm apart; the rachis twists to form a cylindrical spiral. There are 3-5 appressed non-floriferous bracts at the base of the rachis.

 

The Flowers

 

Henrik Pedersen wrote (1997) that the flower colour is orange to brick red. The sepals and petals spread widely. The dorsal sepal is shaped linear and has an obtuse to rounded apex. The dorsal sepal measures 5.4-8.2mm long and 1.6-1.9mm wide. The dorsal sepal is three veined and has an entire margin. The lateral sepals are shaped linear and have obtuse apices. The lateral sepals measure 5.8-8.5mm long and 1.5-2.2mm wide. The lateral sepals are three veined and have entire margins. The petals are shaped linear and have obtuse to rounded apices. The petals measure 6.0-7.3mm long and 1.1-1.9mm wide. The petals are three veined and have entire margins. The labellum is pendent and entire. The labellum is shaped linear and has an obtuse to rounded apex. The labellum measures 5.4-8.9mm long and 1.8-2.2mm wide. The labellum is three veined and has an entire margin; the lateral margins incurve at the apex. There are two short keels located along the lateral veins. The column is erect, straight and measures 1.7-2.3mm long. The apical hood is prolonged into a truncate, finely dentate to somewhat bilobed apex which distinctly exceeds the anther cap. The column foot is short. The stelidia grow upwards from the middle of the column and are equal to or slightly exceed the column apex. The stelidia are shaped linear-triangular and have obtuse to subacute apices.

 

Herbarium Specimens

 

Holotype

 

Philippine National Herbarium (PNH)

 

Specimen - destroyed

 

 

Isotype

 

AMES

 

Specimen 18874 (photo)

 

Royal Botanic Gardens, Kew (K)

 

I could not locate the specimen

 

 

Other herbarium specimens

 

National Herbarium Netherlands (L)

 

Specimen L0322618

 

Scent

 

Yes, a sour scent.

 

Flowering Season

 

Flowering plants have been collected in the wild during March, April and May and August.

 

Culture

 

I do not think this species is in cultivation

 

Similar Species

 

Superficially from a distance it looks like Dendrochilum coccineum

 

Other Information

 

NA

 

Reference -

 

AMES, Oakes. 1908, Illustrations and studies of the Family Orchidaceae Facsimile 2, Ames Botanical Laboratory, North Easton, Massachusetts, Boston.

 

PEDERSEN, Henrik. 1997, The Genus Dendrochilum (Orchidaceae) in the Philippines – A Taxonomic Revision. Opera Botanica, Denmark

 

World Checklist of Selected Plant Families. 17 January 2009. The Board of Trustees of the Royal Botanic Gardens, Kew. Published on the Internet; http://www.kew.org/wcsp/ accessed 17 January 2009.