Accepted name: Dendrochilum abortum (Ames) L.O.Williams, Philipp. J. Sci. 80: 310 (1952)

Subgenus – Acoridium. Section – Acoridium.

 


 
 

Synonyms

 

Acoridium abortum Ames, Blumea, Suppl. 1: 68 (1937).

 

Origin in the Wild

 

Luzon

 

Elevation in the Wild

 

I could find no record

 

Habitat in the Wild

 

This species was collected in Rizal Province. Nothing else is known about its location or habitat.

 

The Plants Description

 

The pseudobulbs cluster on a short rhizome and are shaped slenderly fusiform-terete. The pseudobulbs measure 1.0-2.2cm long and 0.1-0.2cm in diameter. The pseudobulbs are covered by cataphylls while they are growing. The cataphylls disintegrate into non-persistent fibres as the pseudobulbs mature. The leaves are petiolate; the petiole measures 0.9-1.8cm long. The leaf blades are shaped narrowly-linear and have acuminate, somewhat cymbiform apices. The blades measure 7.0-12cm long and 0.2-0.3cm wide. There are 3 distinct nerves on the blades; the 2 lateral nerves are 0.5mm from the leaf margin.

 

The Inflorescence

 

The inflorescence is synanthous and free from the subtending leaf at the time of flowering. The peduncle is suberect to curved and measures 3.2-7.2cm long. The rachis is pendent and measures 3.6-11.6 cm long.  The flowers alternate distichously and are spaced c1.0mm apart. There are 4-8 appressed non-floriferous bracts on the rachis. The flowers open from the proximal end of the rachis.

 

The Flowers

 

The flowers open widely. The dorsal sepal is shaped oblanceolate with a subacuminate apex. The dorsal sepal measures 2-2.4mm long and 0.7-0.8mm wide. The dorsal sepal has entire margins and is 1-veined. The lateral sepals are shaped obliquely ovate-lanceolate and have subacuminate apices. The laterals measure 1.8-2.3mm long and 0.7-0.9mm wide. The lateral sepals have entire margins and are 1-veined. The petals are shaped obliquely elliptic-trulliform with obtuse to subacuminate apices. The petals measure 1.4-1.7mm long and 0.7-0.8mm wide. The petals have entire margins and are 1-veined. The labellum is porrect, 3-lobed, obscurely 3-veined and smooth. The side lobes are erect and broadly crescent shaped with obtuse apices. The side lobes distinctly exceed the mid-lobe. The mid-lobe is small, shaped transversely oblong with 3 lobes that have rounded to obtuse apices.  There are 2 calli that are large and located from the centre of the disc well into the side lobes. The calli are roughly the same size as the mid-lobe. The column is suberect and straight, 0.6-0.7mm long and somewhat hooded at its apex. The anther cap is subquadrate from its upper view and lobed at the back. The anther is truncate when looking from the front.

 

Herbarium Specimens

 

Holotype

 

AMES

 

Specimen 18823 (photo)

 

 

Isotype

 

National Herbarium Netherlands, Leiden (L)

 

Specimen L0058471

 

P

 

Scent

 

I could find no record.

 

Flowering Season

 

Flowering plants have been collected in the wild during September.

 

Culture

 

I only know of this species being in cultivation in Australia.

 

Similar Species

 

Dendrochilum asperum

Dendrochilum parvulum var parvulum

Dendrochilum parvulum var strictiforme

Dendrochilum binuangense

Dendrochilum microchilum

Dendrochilum quadrilobum

Dendrochilum mindanaense

 

Other Information

 

Henrik Pedersen grouped this species with the others mentioned above. Pedersen wrote that Dendrochilum abortum may be the sister species of Dendrochilum mindanaense.

 

Reference 

 

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

 

World Checklist of Selected Plant Families. 28 December 2008. The Board of Trustees of the Royal Botanic Gardens, Kew. Published on the Internet; http://www.kew.org/wcsp/ accessed 28 December 2008.