Accepted name: Dendrochilum carnosulilabrum J.J.Sm., Repert. Spec. Nov. Regni Veg. 32: 177 (1933)

Subgenus – Platyclinis. Section – Eurybrachium.

 

 

 

Synonyms

 

Dendrochilum ovatum J.J.Sm., Bull. Jard. Bot. Buitenzorg, III, 10: 30 (1928), nom. illeg.

 

Origin in the Wild

 

Sumatra

 

Elevation in the Wild

 

2,100 – 2,200 metres

 

Habitat in the Wild

 

This species has been collected from the summit of Mount Pinto in Northern Sumatra. Mount Pinto is close to Berastagi, Mount Sibayak must be climbed first to reach it.

 

The Plants Description

 

The rhizome is pendent, branching and grows to 58cm long. The pseudobulbs are spaced 7-12cm apart along the rhizome. The pseudobulbs measure 2.4-3.2cm long. The leaves are petiolate; the petiole measures 1.2cm long. The leaf blade is shaped obliquely-ovate with long-acuminate apices; the leaf margins at the apex sometimes fold inwards to meet one another. The leaf blade measures 5.5-12.5cm long and 1.7-5cm wide. The leaves are shorter when growing from a side branch.

 

The Inflorescence

 

The inflorescence is synanthous. The peduncle arches and measures 3-7cm long. The rachis measures 13-19cm long. The flowers are spaced 3-5mm apart.

 

The Flowers

 

I counted 50 flowers on the Leiden specimen’s inflorescence. The flowers measure 6mm wide and 8.5mm long. The dorsal sepal is shaped narrowly oblong and has an acute or apiculate apex. The dorsal sepal measures 5.7mm long and 2mm wide. The lateral sepals are shaped obliquely lanceolate. The lateral sepals measure approximately the same size as the dorsal sepal. The petals are shaped oblong-elliptic and have acute apices. The petals measure 5mm long and 2.25mm wide. The upper petal margins are erose. The labellum does not have distinct side lobes however the margins at the base are erect. The labellum is shaped broadly ovate and narrows at the apex. The labellum measures 3.5mm long and 2.6mm wide. The labellum is minutely hairy. The labellum has 2 keels that are connate from the base and separate to form a U-shape. The column measures 1.5mm long. The apical hood is broad, concave and mildly dentate. The stelidia grow from above the middle of the column and incurve at their obtuse apices; the stelidia do not reach the column apex.

 

Herbarium Specimens

 

Holotype

 

National Herbarium Netherlands, Leiden (L)

 

Specimen L0058455 (photo)

 

Scent

 

I could find no record

 

Flowering Season

 

The specimen above was collected during January

 

Culture

 

I do not think this species is in cultivation

 

Similar Species

 

Dendrochilum latilobum

 

Other Information

 

I have mostly used Jim Combers description. Jim Comber based his description on J.J Smith’s description of Dendrochilum ovatum in 1928. When J.J Smith wrote that description he forgot that he had already used Dendrochilum ovatum in 1922 for a different species. J.J Smith changed the name to its current name when he compiled his enumeration of Sumatran orchids in 1933.

 

Jim Comber wrote that this species is closely related to Dendrochilum latilobum.

 

Reference

 

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

 

World Checklist of Selected Plant Families. 03 October 2008. The Board of Trustees of the Royal Botanic Gardens, Kew. Published on the Internet; http://www.kew.org/wcsp/ accessed 03 October 2008.