Accepted name: Dendrochilum anfractum (Ames) Pfitzer in H.G.A.Engler (ed.), Pflanzenr., IV, 50 II B 7: 118 (1907)

Subgenus – Pseudacoridium. Section – Luzonorchis.


 
 

 

Synonyms

 

Acoridium anfractum Ames, Proc. Biol. Soc. Wash. 19: 148 (1906).

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

 

Origin in the Wild

 

Luzon

 

Elevation in the Wild

 

1880 - 2150 metres

 

Habitat in the Wild

 

This species grows as an epiphyte is mossy forest in Benguet Province on Mount Boadan, Mount Simakoko and Mount Data and in Ifugao Province on Mount Polis.

 

The Plants Description

 

The pseudobulbs cluster on a short rhizome. The pseudobulbs are shaped fusiform and measure 1-4.1cm long and 0.2-0.4cm in diameter (Pedersen 1997). Ames wrote that the pseudobulbs are shaped oblong and measure 1-3cm long. The leaves are petiolate, the petiole measures 0.3-1.5cm long. The leaf blade is shaped (linear) lanceolate and measures 2.7-10.4cm long and 0.4-1.4cm wide. The leaves are thin textured to somewhat leathery and have 3-5 distinct nerves.

 

The Inflorescence

 

The peduncle is suberect to curved and measures 2.2-13cm long. The rachis is nodding to pendent and almost flexuose. The rachis measures 2.3-7cm long. The flowers alternate distichously and are spaced 5-6mm apart. There are between 1-5 non-floriferous bracts at the base of the rachis. The flowers open from the proximal section of the rachis.

 

The Flowers

 

Between 4 and 14 flowers grow on an inflorescence (Pedersen 1997). The flower colour is red to pale brown, dark reddish brown and rarely white. The labellum is usually a darker shade than the sepals and petals. The dorsal sepal is shaped (elliptic)-oblong to ovate-oblong with an obtuse to rounded apex. The dorsal sepal measures 5-6.5mm long and 2.2-3mm wide. The dorsal sepal has entire margins, is 3-veined, generally glabrous or with a few tiny trichomes. The lateral sepals are shaped obliquely ovate (oblong) and have obtuse or finely mucronate, acuminate apices. The lateral sepals measure 4.9-6.4mm long and 2.3-3.3mm wide. The lateral sepals are 3-4 veined and have entire margins. The petals are shaped broadly (orbicular) obovate and have obtuse to acute apices. The petals measure 4.8-5.9mm long and 3.4-4.3mm wide. The petals are glabrous, 3-veined and have entire margins and can be finely erose. The labellum is porrect, 3-lobed and measures 1.5-1.9mm long and 3.7-4.2mm wide. The side lobes exceed the mid lobe in length and have subacuminate-caudate apices. There are pyramidial shaped calli on the side lobes. The mid lobe is shaped truncate-rounded and apiculate in its middle. The column is erect to slightly incurved and measures 1.4-1.6mm long. The anther cap is elliptic from the upper view and obtuse from the front.

 

Herbarium Specimens

 

Holotype

 

Philippine National Herbarium (PNH)


Specimen - destroyed

 

Isotype

 

AMES


Specimen 25 (photo)

 

Other herbarium specimens

 

British Natural History Museum (BM)

 

Specimen Ramos, M. & Edaño, G.E. 39

Specimen Ramos, M. & Edaño, G.E. 40

 

Scent

 

The flowers are fragrant

 

Flowering Season

 

Flowering plants have been collected in the wild from August to October.

 

Culture

 

I do not think this species is in cultivation.

 

Similar Species

 

Dendrochilum apiculatum

Dendrochilum anfractum var anfractoides (see this page for the differences)

 

Other Information

 

Ames wrote that this species is allied to Dendrochilum pumilum. The 2 species are now considered to be in separate subgenus.

 

There are many plants and photos labelled as Dendrochilum anfractum on the internet, nurseries, show tables etc. These photos and plants are all Dendrochilum cootesii. As far as I am aware there are no plants of Dendrochilum anfractum in cultivation and no photos of a living plant are in existence.

 

Reference -

 

AMES, Oakes. 1908, Illustrations and studies of the Family Orchidaceae Facsimile 2, 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. 08 October 2008. The Board of Trustees of the Royal Botanic Gardens, Kew. Published on the Internet; http://www.kew.org/wcsp/ accessed 08 October 2008.