Phalaenopsis sumatrana Korth. & Rchb. f. 1860 SUBGENUS Polychilos
SECTION Zebrinae Pfitz 1889 Photo by © Parkside Orchids Website.
Common Name The Sumatran Phalaenopsis
Flower Size 2 to 3" [6-7.6 cm] Fragrant
Found in Sumatra, Borneo and the Malay pennisula as well as the
Philippines as a medium sized, warm to hot growing epiphyte in
lowland to mixed montane forests on trees and shady nooks near
streams at elevations to 700 meters with a short stem completely
enveloped by persistent, imbricating leaf bases carrying fleshy,
obovate or oblong-elliptic, arched or pendant, acute or rounded
leaves that blooms on a to 12" [30 cm] long, ascending, several 
to many flowered, racemose or few branched, fractiflex inflorescence
with triangular floral bracts and mildly fragrant, fleshy, color
variable flowers occuring in the spring through fall.
Synonyms Phalaenopsis acutifolia Linden 1886; Phalaenospsis
corningiana var flava Hort. ex Fowlie 1982; Phalaenopsis
paucivittata [Rchb.f] Fowlie 1985; Phalaenopsis sumatrana var
paucivittatas Rchb.f 1882; Phalaenopsis sumatrana subvar.
paucivittata [Rchb.f] Veitch 1891; Polychilos sumatrana [Korth &
Rchb.f] Shim 1982