Polystachya penangensis Ridl., 1896

This specimen collected from rubber plantation in Rokan Hulu, Riau by Mrs. Shiva Ramli. Flowering during January 2013.

Polystachya penangensis Ridl., 1896 describe first time  from specimen collected from Penang island, part of Pensinular Malaysia. The locate is near Riau if we try to connected the possible ID with all heterotypic synonym list. I think the possibility ID also Polystachya singapurensis Ridl., 1896, but the number of leaves not matching with this specimen. Compare to Polystachya flavescens (Blume) J.J.Sm., 1905 from Java its is different  side lobe and mid-lobe  of labellum form.

Polystachya penangensis Ridl., 1896 allied to  Polystachya concreta (Jacq.) Garay & H.R.Sweet, 1974, this species reintroduce  or transfer later in year 1974 by Garay and H. R. sweet from basionym Epidendrum concretum Jacq., 1760

Polystachya penangensis Ridl.

Polystachya penangensis Ridl.

Polystachya penangensis Ridl.

Polystachya penangensis Ridl.

Polystachya penangensis Ridl.

Polystachya penangensis Ridl.

Polystachya penangensis Ridl.

Polystachya penangensis Ridl.

Basionym :
Polystachya penangensis Ridl., J. Linn. Soc., Bot. 32: 344 (1896). 

Distribution 
Peninsular Malaysia (Penang island), Sumatra (Riau)
42 MLY SUM


Lifeform: 
Pseudobulb geophyte or epiphyte


Examination