Phragmipedium section Platypetalum (Pfitzer)Garay
in Orchid Digest 43(4): 133, 1979.

Synonyms :
   Paphiopedilum section Platypetalum (Pfitzer)V.A. Albert & Börge Pettersson in Lindleyana 9(2): 137, 1994.
   Phragmopedilum section Platypetalum Pfitzer in E. Engler, Das Pflanzenreich IV.50, Heft 12: 43, 1903.

Type species :
   Phragmipedium lindleyanum (Schomburgk ex Lindley)Rolfe.

Characteristics : The taxa of the section Platypetalum are characterized by the differently shaped petals and sepals.

Species : This section of the genus Phragmipedium contains one to three species, depending on the taxonomist. For example Leslie A. Garay (1979) recognizes three different species where as Lucile M. McCook (1989) only sees one species (Phrag. lindleyanum). Others see two species and one variety. Olaf Gruss (2003) in his recent checklist of the genus lowers sargentianum to the variety level which results in one species with two varieties. In this website I have followed this view.
The one species and the two varieties can be distinguished by the shape of the staminode, the pouch and by the colouring of the leaves.

Taxonomic history :
 
lindleyanum
kaieteurum
sargentianum
Veitch
1887-1894
Stein
1892
Pfitzer
1903
Fortin
1975
L.A. Garay
1979
Schoser
1983
Hennessy & Hedge
1989
L.M. McCook
1989
C. Cash
1991
O. Gruss
1995
L.M. McCook
1998
O. Gruss
2003
(unknown entity) Paphiopedilum lindleyanum Phragmopedilum lindleyanum lindleyanum lindleyanum lindleyanum lindleyanum lindleyanum lindleyanum lindleyanum lindleyanum lindleyanum
(unknown entity) Paphiopedilum lindleyanum Phragmopedilum lindleyanum var. kaieteurum (not mentioned) kaieteurum kaieteurum kaieteurum lindleyanum lindleyanum var. kaieteurum lindleyanum var. kaieteurum lindleyanum lindleyanum var. kaieteurum
(unknown entity) (unknown entity) Phragmopedilum sargentianum (not mentioned) sargentianum sargentianum sargentianum lindleyanum sargentianum sargentianum lindleyanum lindleyanum var. sargentianum