Accepted name: Dendrochilum ocellatum (Ames) Pfitzer in H.G.A.Engler (ed.), Pflanzenr., IV, 50 II B 7: 117 (1907)

Subgenus – Acoridium. Section – Acoridium.


 
 

Synonyms

 

Acoridium ocellatum Ames, Proc. Biol. Soc. Wash. 19: 151 (1906).

 

Origin in the Wild

 

Luzon

 

Elevation in the Wild

 

2150 metres

 

Habitat in the Wild

 

The type was collected in Benguet Province on Mount Data. No information is available about the habitat for this species. There is one record (bacani/For. Bur. 15908) that states it was collected at the top of a mango tree.

 

The Plants Description

 

The plant is small and tufted and grows pseudobulbs that cluster on a short rhizome. The pseudobulbs are shaped fusiform-ellipsoid and measure 0.5-1cm long and 0.2-0.4cm wide. The pseudobulbs are covered by c3 cataphylls while they are growing. The cataphylls disintegrate into persistent fibres as the pseudobulbs mature. The leaves are petiolate, the petiole measures 0.4-1.2cm long. The leaf blades are shaped linear-oblong and have obtuse apices. The leaf blades measure 1.7-5.6cm long ad 0.4-0.6cm wide. The leaves have three distinct nerves, the two outermost are 0.5-1mm from the leaf margin.

 

The Inflorescence

 

The inflorescence is synanthous; the peduncle is free from the subtending leaf at the time of flowering. The peduncle is suberect to curved and measures 3.7-5.5cm long. The rachis is nodding and measures 1.5-2.9cm long. The flowers alternate distichously, can be flexuose and are spaced 1.5-2mm apart. There are 1-2 non floriferous bracts at the base of the rachis. The flowers open from the proximal section of the rachis.

 

The Flowers

 

Between 10 and 13 flowers have been recorded growing on an inflorescence (Pedersen 1997). The flowers are brown to reddish-black; Ames described them as brownish-red (Ames 1908). The sepals and petals have ocelli scattered all over them. The dorsal sepal is shaped elliptic-oblong and has an obtuse apex. The dorsal sepal measures c2.7mm long and c1.5mm wide. The dorsal sepal has an entire margin and is three veined. The lateral sepals are shaped slightly oblique and have ovate apices. The lateral sepals measure c2.7mm long and 1.7-1.8mm wide. The lateral sepals have entire margins and are three veined. The petals are somewhat oblique, shaped elliptic-oblong and have obtuse apices. The petals measure c2.4mm long and c1.3mm wide. The petals have entire margins and are three veined. The labellum is porrect, entire and three veined. The labellum measures c1.1mm long and c1.8mm wide. The labellum is shaped reniform, has erect lateral parts, and has an acuminate apex. There are three calli that are appressed, the median callus is smaller, shaped oblong and situated in the centre of the labellum, the 2 lateral calli are larger and shaped oblongoid. The column is suberect, somewhat incurved and measures 0.5-0.6mm long; the column is hooded at the apex. The anther cap is subquadrate from its upper view and rounded from the front.

 

Herbarium Specimens

 

Holotype

 

Philippine National Herbarium (PNH)

 

Specimen - destroyed

 

 

Isotype

 

AMES

 

Specimen 42 (photo)

 

 

Scent

 

I could find no record

 

Flowering Season

 

Flowering plants have been collected in the wild during October.

 

Culture

 

I do not think this species is in cultivation

 

Similar Species

 

Dendrochilum oliganthum (please see this page for the differences)

 

Other Information

 

Henrik Pedersen wrote that Dendrochilum ocellatum and Dendrochilum oliganthum are sister species (Pedersen 1997). Ames wrote that this species is different from all other Philippine taxa by the scattered ocelli on its sepals and petals.

 

Oakes Ames wrote in his facsimile 2 “In the herbarium of the Bureau of Science at Manila this species and Dendrochilum ocellatum are mounted on the same sheet. Both species were collected by Mr. Merrill at the same time. Only four plants were found, two of each species. D. oliganthum belongs to that group of species which have the lateral lobes of the lip much smaller, than the middle lobe, and which merge with D. whitfordii and D. ocellatum” (Ames 1908).

 

Reference

 

AMES, Oakes. 1908, Illustrations and studies of the Family Orchidaceae Facsimile 2, Ames Botanical Laboratory, North Easton, Massachusetts, Boston.

 

AMES, Oakes. 1909, Notes on the Philippine Orchids with Descriptions of New Species, Philippine Journal of Science, Manila, Philippines.

 

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

 

World Checklist of Selected Plant Families. 25 November 2008. The Board of Trustees of the Royal Botanic Gardens, Kew. Published on the Internet; http://www.kew.org/wcsp/ accessed 25 November 2008.