Accepted name: Dendrochilum loheri Ames, Orchidaceae 3: 12 (1908)


Subgenus – Acoridium. Section – Acoridium.


 
 

Synonyms

Acoridium loheri (Ames) Ames, Orchidaceae 7: 81 (1922).

Origin in the Wild

 

Luzon

 

Elevation in the Wild

 

c1600 metres

 

Habitat in the Wild

 

This species has been collected in Benguet Province on Mount Data, Baguio and on Mount Santo Tomas.

 

The Plants Description

 

The pseudobulbs cluster on a short rhizome. The pseudobulbs are shaped ellipsoid to somewhat fusiform and measure 0.4-1.2cm long and 0.2-0.3cm in diameter. The pseudobulbs are covered by 3-4 cataphylls while they are growing. The cataphylls disintegrate into non-persistent fibres as the pseudobulbs mature. The leaves are petiolate; the petiole measures 0.2-0.9cm long.  The leaf blades are shaped linear to lanceolate and have obtuse to subacute apices, sometimes finely mucronate. The leaf blades measure 1.7-6.2cm long and 0.2-0.5cm wide and have 3 distinct nerves

 

The Inflorescence

 

The inflorescence is synanthous and is free from the subtending leaf at the time of flowering. The peduncle is suberect or curved and measures 1.8-9cm long. The rachis is nodding to pendent and measures 0.6-4cm long. The flowers are arranged distichously, flexuose and spaced 3-6mm apart. There are 1-2 non-floriferous bracts at the base of the rachis. The flowers open at the proximal section of the rachis.

 

The Flowers

 

Between 1 and 8 flowers grow on an inflorescence (Pedersen 1997). The sepals and petals open widely and are coloured white or rose, the labellum is yellow with a carmine mid-lobe. The dorsal sepal is shaped lanceolate and has an acuminate apex. The dorsal sepal measures 5.3-5.5mm long and 1.5-1.7mm wide. The dorsal is one veined and has an entire margin. The lateral sepals are shaped obliquely elliptic-oblong and have obtuse to subacuminate apices. The lateral sepals measure 4.8-5.1mm long and 2-2.2mm wide. The laterals are one veined and have entire margins. The petals are shaped oblique, lanceolate-ovate and have acuminate apices. The petals measure 4.4-5.4mm long and 1.3-1.8mm wide. The petals are one veined and have entire margins. The labellum is porrect and 3-lobed. The labellum measures 0.8-0.9mm long and 2.6-2.7mm wide. The labellum is obscurely 1-3 veined and has entire margins. The side lobes are erect and embrace the column. The side lobes are shaped broadly obovate-spathulate to flabellate and have rounded apices. The mid-lobe is shaped transversely oblong to broadly reniform and has a slightly apiculate apex. There are 2 lateral calli that are shaped transversely oblongoid to somewhat pyramidal and located at the base of the side lobes. The median callus is small and located at the centre of the hypochile. The column is suberect and measures 0.7-0.9mm long; the column is hooded at its apex. The anther cap is subquadrate from its upper view and rounded-obtuse from its front.

 

Herbarium Specimens

 

Holotype

 

US

 

Isotype

 

AMES

 

Specimen 18838 (photo)

 

Scent

 

I could find no record

 

Flowering Season

 

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

 

Culture

 

I do not think this species is in cultivation

 

Similar Species

 

Dendrochilum pulogense

Dendrochilum microchilum

Dendrochilum parvulum

 

Other Information

 

Oakes Ames compared this species to Dendrochilum microchilum and Dendrochilum parvulum var strictiforme (venustulum). L.O Williams wrote that Dendrochilum loheri was closer to Dendrochilum pulogense a statement that Henrik Pedersen agreed with.

 

Ames found this species in the US National Herbarium on the same sheet as Dendrochilum cinnabarinum. Ames described the species from Loher's original collections.

 

Reference -

 

AMES, Oakes. 1908, Illustrations and studies of the Family Orchidaceae Facsimile 3, Ames Botanical Laboratory, North Easton, Massachusetts, Boston.

 

AMES, Oakes. 1920, Illustrations and studies of the Family Orchidaceae Facsimile 6 The Orchids of Mount Kinabalu British North Borneo, 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. 01 December 2008. The Board of Trustees of the Royal Botanic Gardens, Kew. Published on the Internet; http://www.kew.org/wcsp/ accessed 01 December 2008.