Paphiopedilum sanderianum (Rchb. f.) Stein 1895 SUBGENUS Polyantha SECTION Mastigopetalum Photo courtesy of Nigel Carter

Plant in situ Moonmilk Cave Borneo

Plant Cluster on cliffwall Clearwater Cave, Mulu National Park

Plant in situ Mulu NP in leaf Litter

Mulu National Park Borneo Typical P sanderiana habitat

Photos courtesy of Peter Maxwell

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Common Name Sander's Paphiopedilum [English Orchid Gaqrdener]

Flower Size 4" [10 cm]

A medium sized, hot to warm growing, lithophytic species found on southeastern facing, seeping, vertical limestone cliffs in Borneo at elevations of 150 to 900 meters that has 4 to 5, linear, shiny green leaves and has multiflowered blooms in the spring through winter on a suberect, terminal, purple, 2' [60 cm] long, pubescent inflorescence with an elliptic-lanceolate, red brown, floral bract carrying 2 to 5, simultaneously opening flowers.

This area receives an enormous amount of annual rainfall evenly spread throughout the year and is an area that has a large day to night temperature change and heavy dews.

Synonyms Cordula sanderiana [Rchb.f] Rolfe 1912; Cypripedium foerstermanni Hort.; *Cypripedium sanderianum Rchb. f. 1886; Paphiopedilum sanderanum (Rchb. f.) Pfitzer

References W3 Tropicos, Kew Monocot list , IPNI ; Die Orchideen Schlechter 1915; Atlas des Orchidees Cultivees Constantin 1920 as Cypripedium sanderianum drawing fide; Encyclopedia of Cultivated Orchids Hawkes 1965; Orchid Digest Vol 38 no 6 1974 drawings fide; Orchid Digest Vol 44 No 5 1980 drawing fide; AOS Bulletin Vol 50 No 5 1981 drawing as Cypripedium sanderianum; Orchid Digest Vol 47 No 5 1983 photo fide; Orchidiana Philipiniana Vol 1 Valmayor 1984 erroneous; Orchid Digest Vol 51 No 4 1987 photo ok; AOS Bulletin Vol 57 No 1 1988 photo; A Checklist of the Orchids of Borneo Wood & Cribb 1994 photo fide; Orchids of Borneo Chan, Shim, Lamb & Wood 1994; Orchid Digest Vol 59 No 3 1995 photo fide; AOS Bulletin Vol 68 No 9 1999 photo ; AOS Bulletin Vol 69 No 1 2000 photo; Rudolf Schlechter Die Orchideen Band 1C lieferung 40 pg 2492 - 2564 Brieger 2000; AOS Bulletin Vol 75 No 10 2006 photo; AOS Bulletin Vol 77 No 11 2008 photo