Accepted name: Dendrochilum javieriense Magrath, Bulmer & I.Shafer, Lindleyana 4: 135 (1989)*



Subgenus – Acoridium. Section – Acoridium.


 
 

 

 

Synonyms

 

None

 

Some publications and individuals name this species Dendrochilum javierii (see notes below).

 

*I have chosen, for this website, to follow the name Dendrochilum javierii, as per Jim Cootes. Please see the notes under other information.

 

Henrik Pedersen called this species Dendrochilum javieriense.

 

Origin in the Wild

 

Luzon

 

Elevation in the Wild

 

1830-2440 metres

 

Habitat in the Wild

 

This species was collected in Nueva Vizcaya Province on the Dalton Pass. The type was recorded as growing as an epiphyte on moss covered tree branches where it received 10-30% direct sunlight. The temperature range was recorded as 12-35 degrees.

 

The Plants Description

 

The pseudobulbs cluster along the rhizome and are shaped terete-fusiform. The pseudobulbs measure 2-4.3cm long and 0.3-0.6cm in diameter. The pseudobulbs are covered by 4 cataphylls while they are growing. The cataphylls disintegrate into persistent fibres as the pseudobulbs mature. The leaves are petiolate but not distinctly. The leaf blades are shaped linear and have acute apices. The leaf blades measure 23cm long and 0.7-0.9mm wide. The leaves have 5 distinct nerves, the 2 lateral nerves 1.0mm from the leaf margin. The leaves can have a bronze tinge to them.

 

The Inflorescence

 

The peduncle is enclosed for ¼ of its length by the subtending leaf. The peduncle is suberect to curved and measures 17.5-21.5cm long. The peduncle is polygonal in cross-section. The rachis is nodding and measures 8.2-10cm long. The flowers alternate distichously and are spaced 3-4mm apart. There are c4 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 to sulphur-yellow and have widely spreading sepals and petals. The dorsal sepal is shaped oblong and has a rounded apex. The dorsal sepal measures 6.5-7.3mm long and 2.7-3mm wide. The dorsal sepal is three veined and has an entire margin. The lateral sepals are shaped oblong and have rounded apices. The lateral sepals measure 6.5-8mm long and 3-3.3mm wide. The lateral sepals are 3-4 veined and have entire margins. The petals are shaped elliptic to obovate and have rounded apices. The petals measure 4.8-5.5mm long and 2.5-3mm wide. The petals are three veined and have entire margins. The labellum is porrect and is 3-lobed. The labellum measures 1-1.2mm long and 2.2-2.4mm wide. The labellum is obscurely 3-veined, glabrous and has entire margins. The side lobes recurve, are suberect, shaped obliquely subspathulate and have rounded apices. The mid-lobe is very small, shaped broadly triangular and has an acute apex. There are 2 tiny calli located at the base of each side lobe and close to the front margin, there is no median callus. The column is straight, suberect and measures 0.8-1.0mm long. The column is somewhat hooded. Stelidia and column foot are absent.

 

Herbarium Specimens

 

Holotype

 

OCLA

 

Isotype

 

BRIT

 

MO

 

Marie Selby Botanical Gardens (SEL)

 

Specimen 17372 (photo)

 

Other herbarium specimens

 

Royal Botanic Gardens Kew (K)

 

Specimen 60706.000

Specimen 71421.000

Specimen 63656.000

Specimen 61359.000

Specimen 70233.000

 

Scent

 

Some flowers are reported to be scented but my experience has been unscented. Kew's specimen 70233 states that it is unscented.

 

Flowering Season

 

Flowering plants have been collected in the wild during February and November. In northern hemisphere cultivated plants have flowered during the winter and spring.

 

Culture

 

This species is common in cultivation although frequently mislabelled as Dendrochilum arachnites 'yellow'. See the comments under Dendrochilum arachnites.

 

I have seen plants in the United States, Australia and the European Union.

 

Similar Species

 

Dendrochilum wenzelii

Dendrochilum saccolabium

Dendrochilum banksii

Dendrochilum pseudowenzelii

 

Other Information

 

The epithet refers to Elias Javier and owner of an orchid nursery in the Philippines.

 

Jim Cootes wrote "This species was originally named Dendrochilum javieriense but the specific epithet, which alludes to a locality, is incorrect as the plant was named after Elias Javier. Therefore the correct name for this species is Dendrochilum javierii" (Cootes 2001).

 

Reference -

 

COOTES, Jim. The Orchids of the Philippines, 2001. Timber Press, USA

 

COOTES, Jim. BANKS, David. 1995, The genus Dendrochilum A guide to the species in cultivation, Orchids Australia, AOC

 

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

 

World Checklist of Selected Plant Families. 30 January 2008. The Board of Trustees of the Royal Botanic Gardens, Kew. Published on the Internet; http://www.kew.org/wcsp/ accessed 30 January 2008.