Accepted name: Dendrochilum apiculatum (Ames) L.O.Williams, Philipp. J. Sci. 80: 331 (1952)

Subgenus – Pseudacoridium. Section – Luzonorchis.

 

The drawing above is by Oakes Ames and from a type at the Ames herbarium.

 

 

 

Synonyms

 

Acoridium apiculatum Ames, Blumea, Suppl. 1: 70 (1937).

Pseudacoridium apiculatum (Ames) Szlach. & Marg., Polish Bot. J. 46: 114 (2001).

 

Origin in the Wild

 

Luzon

 

Elevation in the Wild

 

I could find no information.

 

Habitat in the Wild

 

From Rizal Province. I could not find any further information about the habitat or specimen location.

 

The Plants Description

 

The pseudobulbs are clustered on a short rhizome and are shaped fusiform-terete. The pseudobulbs measure 2-2.7cm long and 0.3-0.4cm in diameter. The pseudobulbs are covered by c4 cataphylls while they are growing. The cataphylls disintegrate into persistent fibres when the pseudobulbs mature. The leaf is petiolate; the petiole measures 1.1-1.2cm long. The leaf blades are shaped broadly lanceolate and have obtuse apices. The leaf blades measures 6.3-7.5cm long and 1.3-1.9cm wide. The leaf blade has 7 distinct nerves; the 2 lateral nerves are 0.5-1mm from the margin.

 

The Inflorescence

 

The peduncle is suberect and measures 7.3-9.5cm long. The rachis is probably pendent and measures 7.1-8.2cm long. The flowers alternate distichously and are spaced 2.0-3.0mm apart.

 

The Flowers

 

Approximately 25 flowers are on the inflorescence of the AMES specimen. The flowers spread widely and are a yellow colour with an orange labellum. The dorsal sepal is shaped elliptic and has an obtuse apex. The dorsal sepal measures 5.8-6.1mm long and 2.3-2.9mm wide. The dorsal sepal is 3-veined and has entire margins. The lateral sepals are shaped somewhat oblique, narrowly elliptic with acuminate apices. The lateral sepals measure 5.6-6.6mm long and 2.1-2.4mm wide. The lateral sepals are 3-veined and have entire margins. The petals are shaped obovate and have obtuse apices. The petals measure 5.3-6.2mm long and 2.2-2.8mm wide. The petals are 3-veined and have fimbriate margins. The labellum is porrect, sessile and 3-lobed. The labellum measures 2.3-2.5mm long and 3-3.6mm wide. The side margins are entire, the mid lobe margin is serrate. The side lobes are erect, shaped falcately ovate and have acuminate apices. The side lobes exceed the mid-lobe. The mid-lobe deeply emarginated, shaped broadly obovate and has a long apiculum in the centre of the apex. There are two calli at the base of each side lobe. The calli are shaped somewhat pyramidal. The column is strongly incurved and clavate. The column measures 1.7-1.8mm long. The column has an apical hood. The anther cap is transversely elliptic from the upper view and truncate from the frontal view

 

Herbarium Specimens

 

Holotype

 

AMES

 

Specimen 27 (photo)

Specimen 217870 (drawing of the type)

 

Scent

 

I could find no information.

 

Flowering Season

 

The label on the holotype state that the plant was collected in January; Lohr's field notes say that the specimen was collected in November.

 

Culture

 

I do not think this species is in cultivation

 

Similar Species

 

Dendrochilum anfractum

 

Other Information

 

This species is most closely related to Dendrochilum anfractum.

 

The epithet refers to the apiculum on the labellum.

 

Reference -

 

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

 

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