Accepted name: Dendrochilum oreophilum (Ames) L.O.Williams, Philipp. J. Sci. 80: 317 (1952)



Subgenus – Acoridium. Section – Convoluta.


 
 

Synonyms

 

Acoridium oreophilum Ames, Blumea, Suppl. 1: 71 (1937).

 

Origin in the Wild

 

Luzon

 

Elevation in the Wild

 

Not known

 

Habitat in the Wild

 

Not known.

 

All we know is that this species was collected in Rizal province.

 

The Plants Description

 

The pseudobulbs cluster along a short rhizome and are shaped fusiform. The pseudobulbs measure 0.8-2.5cm long and 0.2-0.5cm in diameter. The pseudobulbs are covered by c4 cataphylls while they are growing. The cataphylls disintegrate into persistent fibres as the pseudobulbs mature. The leaves are petiolate; the petiole measures 1.2-1.8cm long. The leaf blades are shaped linear-lanceolate and have obtuse apices. The leaf blades measure 7.7-10cm long and 0.7-1.0cm wide. The leaves have three distinct nerves; the two lateral nerves are 1-2mm from the leaf margin.

 

The Inflorescence

 

The peduncle is synanthous. The peduncle is suberect to curved and measures 4-6-31cm long. The rachis is probably pendent and measures 3.7-5.2cm long. The flowers alternate distichously and are spaced c1.5mm apart. There are 3-4 appressed non-floriferous bracts at the base of the rachis. The flowering sequence is unknown, Henrik Pedersen questioned if the flowers opened simultaneously (Pedersen 1997).

 

The Flowers

 

The dorsal sepal is shaped narrowly obovate and has a subacuminate apex. The dorsal sepal measures 2.9-3.2mm long and 1.3-1.4mm wide. The dorsal sepal is three veined and has an entire margin. The lateral sepals are slightly oblique, shaped elliptic-oblong and have subacuminate apices. The lateral sepals measure 2.9-3.2mm long and c1.3mm wide. The lateral sepals are three veined and have entire margins. The petals are shaped broadly oblanceolate and have acute apices. The lateral sepals measure 2.8-2.9mm long and 0.9-1.0mm 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 1.4-1.6mm wide. The labellum is obscurely three veined, glabrous and has entire margins. The side lobes are erect, shaped falcately oblong and have obtuse apices. The side lobes slightly exceed the mid-lobe. The mid-lobe is shaped transversely oblong and is slightly 3-lobed. The lobes on the mid-lobe have obtuse apices. There are two conical shaped calli located at the base of each side lobe, the median callus is located at the centre of the hypochile. The column is straight and measures 0.8-0.9mm long. The column is hooded. Stelidia and column foot are absent.

 

Herbarium Specimens

 

Holotype

 

AMES

 

Specimen 925 (photo)

 

 

Isotype

 

Philippine National Herbarium, (PNH)

 

Specimen - Destroyed

 

AMES

 

Specimen - 44 (photo)

 

Scent

 

I could find no record.

 

Flowering Season

 

I could find no record.

 

Culture

 

I do not think this species is in cultivation.

 

Similar Species

 

Dendrochilum reniforme

 

Other Information

 

Ames wrote that this species is closely related to Dendrochilum reniforme a statement that L.O. Williams and Henrik Pedersen agreed with. Henrik Pedersen wrote that he was tempted to reduce this as a variety of Dendrochilum reniforme but the 2 species differ by minor detail on the roots, petals, labellum and rostellum. Pedersen stated that if further specimens are collected this species will be able to be studied further and may be reduced to a variety of Dendrochilum reniforme (Pedersen 1997).

 

Reference -

 

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

 

World Checklist of Selected Plant Families. 16 February 2008. The Board of Trustees of the Royal Botanic Gardens, Kew. Published on the Internet; http://www.kew.org/wcsp/ accessed 16 February 2008.