Accepted name: Dendrochilum ramosissimum (Ridl.) J.J.Sm., Bull. Jard. Bot. Buitenzorg, III, 5: 37 (1922)

Subgenus – Platyclinis. Section – Eurybrachium.


 

 

 

Synonyms

 

Platyclinis ramosissima Ridl., J. Fed. Malay States Mus. 8(4): 89 (1917).

 

Origin in the Wild

 

Sumatra

 

Elevation in the Wild

 

2,400 – 3,000 metres

 

Habitat in the Wild

 

This species was collected on Mount Kerinci in Western Sumatra.

 

The Plants Description

 

The rhizomes measure up to 50cm long, hang and branch. The pseudobulbs are shaped almost terete and are broader basally that apically. The pseudobulbs are spaced 4.5cm apart along the rhizome. The pseudobulbs measure 1.75-3.5cm long. The leaves are petiolate; the petiole measures 1cm long. The leaf blades are shaped narrowly lanceolate, and narrow abruptly 3cm from their apices. The leaf blades measure 7-13.5cm long and 1-2cm wide. The leaves growing on the main rhizome are larger than those on branching rhizomes.

 

The Inflorescence

 

The inflorescence is synanthous and pendent. The peduncle measures 4-5.5cm long and the rachis 6.75-13cm long. The flowers are spaced 4mm apart.

 

The Flowers

 

The flowers measure 1cm long and 7mm wide. The flowers are coloured light green, the labellum is darker green; sometimes the labellum has a brownish-green blotch on it. The sepals are shaped broadly lanceolate. The sepals measure 5mm long and 1.5mm wide. The petals are shaped rhomboid-lanceolate, curve upwards and have acute apices. The petals measure 5mm long and 1.5mm wide. The labellum is 3-lobed. The side lobes are situated close to the base of the labellum, rounded and just under 1mm long and 2mm wide. The mid lobe is shaped ovate and has an acuminate, acute apex. The mid-lobe measures 3mm long and 1.25mm wide. There are two semicircular keels at the base of the labellum; the keels are connected by a short transverse ridge. The column is very small and measures 1.3mm long. The apical hood has 2-3 teeth on its margin, the stelidia are only small swellings located just under the anther cap.

 

Herbarium Specimens

 

Holotype

 

I could not locate the type

 

Other herbarium specimens

 

National Herbarium Netherlands (L)

 

Specimen L0322716

 

Scent

 

I could find no record

 

Flowering Season

 

Flowering plants have been collected in the wild during April.

 

Culture

 

I do not think this species is in cultivation

 

Similar species

 

Dendrochilum cornutum

Dendrochilum dentiferum

Dendrochilum fuscescens

Dendrochilum ophiopogonoides

Dendrochilum rigidulum

 

 

Additional Comments

 

This species is considered to be closely related to Dendrochilum cornutum but differs as it has larger flowers; the sepals are longer with acuminate apices, the inflorescence emerges as the leaves are undeveloped. The stigma is large and covers the whole face of the column.

 

Reference

 

COMBER, J.B. Orchids of Sumatra, 2001, Royal Botanic Gardens Kew

 

World Checklist of Selected Plant Families. 02 September 2008. The Board of Trustees of the Royal Botanic Gardens, Kew. Published on the Internet; http://www.kew.org/wcsp/ accessed 02 September 2008.