Accepted name: Dendrochilum cinnabarinum var. sanguineum (Ames) H.A.Pedersen, Opera Bot. 130: 22 (1997)

Subgenus – Acoridium. Section – Convoluta.

 

 

 

Synonyms

 

Acoridium sanguineum Ames, Blumea, Suppl. 1: 72 (1937).

Dendrochilum sanguineum (Ames) L.O.Williams, Philipp. J. Sci. 80: 323 (1952).

 

Origin in the Wild

 

Luzon

 

Elevation in the Wild

 

2300-2930 metres

 

Habitat in the Wild

 

This species variety has been recorded as an epiphyte in mossy forest. Plants have been collected from Benguet Province on Mount Data, Mount Tabayoc and Mount Pulog. A specimen was collected and recorded as growing in oak forest another was obtained and recorded as growing in primary forest of one storey bordering open grassland.

 

The Plants Description

 

The pseudobulbs cluster on the short rhizome and are shaped fusiform to obpyriform. The pseudobulbs measure 0.5-2.4cm long and 0.2-0.4cm in diameter. The pseudobulbs are covered by c4 cataphylls while they are growing. The cataphylls soon disintegrate into persistent fibres as the pseudobulbs mature. The leaves are petiolate; the petiole measures 0.8-4.1cm long. The leaf blades are shaped linear and have acute apices. The leaves measure 3.3-10.5cm long and 0.3-0.6cm wide. The leaves have 3 distinct nerves; the 2 lateral nerves are 0.5-1.0mm from the leaf margin.

 

The Inflorescence

 

The inflorescence is synanthous. The peduncle is suberect to curved and measures 4.4-17cm long. The rachis is nodding and measures 3-7.1cm long. The flowers alternate distichously and are spaced 3-5mm apart. There is 1 appressed non-floriferous bract at the base of the rachis. The flowers open from the proximal section of the rachis.

 

The Flowers

 

Henrik Pedersen described the flowers as orange to blood-red (Pedersen 1997); the Leiden isotype states that the flowers are red. The sepals and petals open widely. The dorsal sepal is shaped ovate and has an obtuse apex. The dorsal sepal measures 4.1-4.6mm long and 2.3-2.7mm wide. The dorsal sepal is 3 veined and has entire margins. The lateral sepals are shaped broadly and obliquely ovate and have rounded apices. The lateral sepals measure 3.2-3.9mm long and 2.9-3.6mm wide. The lateral sepals are 3 veined and have entire margins. The petals are shaped broadly elliptic-trulliform and have subacuminate apices. The petals measure 3.8-4.1mm long and 1.8-2.4mm wide. The petals are 3 veined and have entire margins. The labellum is porrect and 3-lobed. The labellum measures 1.5-1.9mm long and 1.8-2.4mm wide. The labellum is obscurely 1-3-veined, glabrous and has entire margins. The side lobes are erect and shaped obliquely to falcately oblong with subacute apices. The side lobes contain a few ocelli. The mid-lobe is shaped linear-oblong and has a subacute apex. The mid-lobe is never auriculate at its base unlike variety cinnabarinum. There are 3 calli located at the centre of the disc, the lateral calli are rounded and the median callus is oblongoid. The column is suberect to slightly incurved. The column measures 0.9-1.1mm long. The column is slightly hooded at its apex. Stelidia and column foot are absent.

 

Herbarium Specimens

 

Holotype

 

AMES

 

Specimen 52 (photo)

 

Isotype

 

National Herbarium Netherlands, Leiden (L)

 

Specimen L0058454

 

New York Botanical garden (NY)

 

Specimen 39512

 

AMES

 

BM

 

Royal Botanic Gardens, Kew (K)

 

I could not locate the specimen

 

National Herbarium Netherlands, Leiden (L)

 

I could not locate the specimen

 

P

 

SING

 

US

 

W

 

Other herbarium specimens

 

National Herbarium Netherlands, Leiden (L)

 

Specimen L0322421

Specimen L0322422

Specimen L0322423

 

Scent

 

I could find no record.

 

Flowering Season

 

Flowering plants have been collected in the wild from January to March and May to July.

 

Culture

 

I do not think this species is in cultivation

 

Similar Species

 

Dendrochilum cinnabarinum var cinnabarinum

Dendrochilum turpe

 

Other Information

 

Ames wrote that Dendrochilum sanguineum was very similar to Dendrochilum cinnabarinum.

 

Henrik Pedersen grouped this species with Dendrochilum curranii, tenuifolium and especially Dendrochilum turpe to which Pedersen thought it was closest to.

 

Reference -

 

 

AMES, Oakes. 1908, Illustrations and studies of the Family Orchidaceae Facsimile 3, 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. 18 January 2009. The Board of Trustees of the Royal Botanic Gardens, Kew. Published on the Internet; http://www.kew.org/wcsp/ accessed 18 January 2009.