Accepted name: Dendrochilum reniforme Ames, Orchidaceae 5: 63 (1915)

Subgenus – Acoridium. Section – Convoluta.


 
 

Synonyms

 

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

Acoridium urciforme Ames, Blumea, Suppl. 1: 76 (1937).

Dendrochilum urciforme (Ames) L.O.Williams, Philipp. J. Sci. 80: 316 (1952).

 

Origin in the Wild

 

Luzon

 

Elevation in the Wild

 

I could find no record.

 

Habitat in the Wild

 

Specimens have been collected from Ifugao Province on Mount Polis, Laguna Province at San Antonio and Rizal Province on Mount Kanumay

 

The Plants Description

 

The pseudobulbs cluster along a short rhizome and are shaped fusiform. The pseudobulbs measure 1.3-3.5cm long and 0.2-0.5cm in diameter. The pseudobulbs are covered by 4-5 cataphylls while they are growing. The cataphylls disintegrate into persistent fibres as the pseudobulbs mature. The leaves are petiolate; the petiole measures 0.7-1.7cm long. The leaf blades are shaped lanceolate and have obtuse apices that are sometime finely mucronate. The leaf blades measure 4-11.6cm long and 0.5-1.0cm wide. The leaves have 3-5 distinct nerves, the two lateral nerves are 1-2mm from the leaf margin.

 

The Inflorescence

 

The inflorescence is synanthous. The peduncle is suberect to curved and measures 2.4-10.5cm long. The rachis is nodding to pendent and measures 3.6-9cm long. The flowers alternate distichously and are spaced 1-1.5mm apart. There are 1-4 appressed non-floriferous bracts at the base of the rachis. The flowers open from the proximal section of the rachis.

 

The Flowers

 

The flowers are yellow. The sepals and petals open widely. The dorsal sepal is shaped narrowly obovate to lanceolate-oblong and has an acuminate 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 oblique, shaped lanceolate to elliptic-oblong and have acuminate apices. The lateral sepals measure 3.3-4.5mm long and 0.9-1.8mm wide. The lateral sepals are three veined and have entire margins. The petals are shaped obliquely linear-lanceolate to narrowly oblong and have acuminate apices that recurve. The petals measure 2.7-3.8mm long and 0.6-1.4mm wide. The petals are 1-3 veined and have entire margins. The labellum is porrect and entire. The labellum measures 0.5-0.8mm long and 1.2-1.8mm wide. The labellum is obscurely three veined, glabrous and has an entire margin. The labellum is shaped reniform to transversely oblong and has a rounded to emarginate apex that is often finely apiculate. The labellum is concave at its base and the lateral margins are incurved. There are two calli located at the base of each side lobe along the lateral nerves, the median callus is located at the centre of the concave part of the hypochile. The column is straight to slightly incurved and measures 0.5-0.9mm long. The column is slightly hooded. Stelidia and column foot are absent.

 

Herbarium Specimens

 

Holotype

 

AMES

 

Specimen 63 (photo) (Acoridium urciforme)

 

 

Lectotype

 

AMES

 

Specimen 51 (photo)

 

 

Isotype

 

BM

 

Royal Botanic Garden, Kew (K)

 

I could not locate the specimen

 

New York Botanical Garden (NY)

 

Specimen 39524 (Isolectotype)

 

Scent

 

I could find no record.

 

Flowering Season

 

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

 

Culture

 

I do not think this species is in cultivation

 

Similar Species

 

Dendrochilum oreophilum (visit this page for differences)

 

Other Information

 

Ames wrote that this species is a close ally of Dendrochilum microchilum due to the slight indentations at the front of the labellum. Henrik Pedersen wrote that the two species are different on account of the leaf ptyxis and the labellum structure.

 

Henrik Pedersen could not find a distinction between Dendrochilum urciforme and Dendrochilum reniforme and for this reason made D. urciforme a synonym of Dendrochilum reniforme.

 

Ames wrote that Dendrochilum urciforme is closely related to Dendrochilum turpe a statement that Henrik Pedersen agreed with. Pedersen wrote that D. reniforme is the sister species of D. oreophilum (Ames 1915).

 

Reference

 

AMES, Oakes. 1915, Illustrations and studies of the Family Orchidaceae Facsimile 5, 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. 12 February 2009. The Board of Trustees of the Royal Botanic Gardens, Kew. Published on the Internet; http://www.kew.org/wcsp/ accessed 12 February 2009.