Paphiopedilum callosum (Rchb. f.) Pfitzer 1895

SUBGENUS Sigmatopetalum SECTION Barbata SUBSECTION Barbata Photo courtesy of Lourens Grobler

Another Flower Photo courtesy of Oak Hill Gardens

to and EARLY

Common Name The Callus Paphiopedilum - In Thailand - V'ang Kang Kop[Chang-mai], Maeng phu,ueang khang kop, rongthao nari, rongthao nang, ueang khangkhok

Flower Size about 4" [to 10 cm]

Blooming in the spring and early summer, this medium sized, hot to cool growing, terrestrial or lithophytic orchid has 3 to 5, narrowly elliptic, oblong-elliptic or obovate, mottled dark green with pale green, acute and equally 2 or 3 lobed apically leaves and a single flowered [occasionally 2], purple, purple pubescenct, erect, to 8 to 14" [20 to 40 cm] long, terminal inflorescence with ovate to elliptic, acute to subacute floral bracts that are 1/3 the length of the ovaries and carrying 1 to rarely 2, showy flowers and is found in Thailand, Cambodia, Vietnam and Laos in primary, closed, evergreen seasonal, broadleafed lowland forests, mixed and coniferous woods and primary highland cloud forests in soils rich in silicates or on granite and sandstone at altitudes of 300 to 2000 meters that grows with even water and fertilizer, plus humid, very shady conditions, year round.

Synonyms Cordula callosa Rolfe 1912; Cypripedium barbatum var. warnerianum T.Moore 1878; *Cypripedium callosum Rchb.f 1886; Cypripedium callosum var. sublaeve Rchb.f. 1888; Cypripedium crossii E. Morren 1865; Cypripedium schmidtianum Kraenzl. 1901; Paphiopedilum amabile sensu Guillam 1937; Paphiopedilum callosum subsp. sublaeve (Rchb.f.) Fowlie 1972; Paphiopedilum callosum var angustipetalum Guillam. 1924; Paphiopedilum callosum var. potentianum (O.Gruss & Roeth) P.J.Cribb 1998 ; Paphiopedilum callosum var schmidtianum [Kraenzl] Pfitzer 1903; Paphiopedilum callosum var. sublaeve (Rchb.f.) P.J.Cribb 1987; Paphiopedilum callosum var. viniferum (Koop. & N.Haseg.) Cavestro 2001; Paphiopedilum callosum var. warnerianum (T.Moore) Aver. 2007; Paphiopedilum crossii [Morren] Braem & Senghas 2000; Paphiopedilum crossii f. viniferum (Koop. & N.Haseg.) Braem & Chiron 2003; Paphiopedilum crossii var. potentianum (O.Gruss & Roeth) Braem & Senghas 2000; Paphiopedilum crossii var. sublaeve (Rchb.f.) Braem & Senghas 2000; Paphiopedilum potentianum O.Gruss & Roeth 1995; Paphiopedilum sublaeve (Rchb.f.) Fowlie 1979; Paphiopedilum viniferum Koop. & N.Haseg. 2000

References W3 Tropicos, Kew Monocot list IPNI ; Die Orchideen Schlechter 1915 photo fide; Die Orchideen Schlechter 1915 as P callosum var rossianum; Die Orchideen Schlechter 1915 as P callosum var sanderae; Die Orchideen Schlechter 1915 as P callosum var schmidtianum; Die Orchideen Schlechter 1915 as P callosum var sublaeve; Atlas des Orchidees Cultivees Constantin 1920 as Cypripedium callosum drawing fide; Flora of Malaya Vol 1 Holttum 1957; The Orchids of Thailand Seidenfadden & Smitnand 1959; AOS Bulletin Vol 33 No 3 1964 photo; Encyclopedia of Cultivated Orchids Hawkes 1965; AOS Bulletin Vol 39 No 11 1970 photo; Orchid Digest Vol 36 No 1 1972 photo fide; Orchid Digest Vol 36 No 4 1972 photo fide; Orchid Digest Vol 36 No 5 1972 as P callosum subs sublaeve photo fide; Orchid Digest Vol 38 no 5 1974; Orchid Digest Vol 38 no 4 1974 as P callosum var sublaeve photo fide; Beautiful Thai Orchid Species Kamemoto & Sagarik 1975 photo fide; Orchid Digest Vol 45 No 2 1981 photo fide; Orchid Digest Vol 45 No 2 1981 as P sublaeve photo fide; Orchid Digest Vol 45 No 2 1981 as P thailandensephoto fide; AOS Bulletin Vol 50 No 5 1981 drawing; AOS Bulletin Vol 50 No 6 1981 photo; Orchid Digest Vol 45 No 2 1981 as P sublaeve photo; Orchid Digest Vol 45 No 2 1981 photo; AOS Bulletin Vol 51 No 7 1982 photo; AOS Bulletin Vol 51 No 10 1982 photo; AOS Bulletin Vol 52 No 2 1983 photo; AOS Bulletin Vol 54 No 2 1985 photo; AOS Bulletin Vol 55 No 12 1986 photo; AOS Bulletin Vol 56 No 5 1987 photo; AOS Bulletin Vol 56 No 12 1987 drawing; Schlechteriana Vol 2 No 1 1991 photo as P callosum subs sublaeve; The Orchids of Penninsular Mayasia and Singapore Seidenfaden & Wood 1992 drawing fide; Thai Orchid Species Rakpaibulsombat 1992 photo fide; AOS Bulletin No 63 No 11 1994 photo; Orchid Digest Vol 59 No 3 1995 photo fide; Orchid Digest Vol 59 No 3 1995 as P callosum var sublaeve photo fide; Orchid Digest Vol 59 No 4 1995 photo fide; The Genus Paphiopedilum Vol 1 & 2 Braem 1999; Australian Orchid Review Vol 65 No 6 2000 photo as P callosum f viridiflorum; Rudolf Schlechter Die Orchideen Lieferung 39 2000 as P crossii; Rudolf Schlechter Die Orchideen Lieferung 39 2000 as P crossii var sublaeve; A field Guide to the Wild Orchids of Thailand Vaddhanaphuti 2001 photo fide; A field Guide to the Wild Orchids of Thailand Vaddhanaphuti 2005 as P callosum var sublaeve photo fide; A to Z of South East Asian Orchid Species Vol 1 O'Byrne 2001 photo fide; AOS Bulletin Vol 73 No 4 2004 photo as P crossii; AOS Bulletin Vol 73 No 4 2004 photo as P viniferum; A field Guide to the Wild Orchids of Thailand Vaddhanaphuti 2005 photo fide; A field Guide to the Wild Orchids of Thailand Vaddhanaphuti 2005 as P callosum var sublaeve photo fide; AOS Bulletin Vol 76 No 3 2007 photo; Orchid Digest Vol 71 No 3 2007 photo; Wild Orchids in Myanamar Vol 3 Tanaka 2007; Orchids of Vietnam, Illustrated survey, part 1 Averyanov 2008; Wild Orchids of Penninsular Malaysia Ong, O'Byrne, Yong & Saw 2011 photo fide;Flora Of Thailand Orchidaceae Vol 12 Part 1 Pedersen, Kurzweil, Suddee & Cribb 2011 drawing/photo fide; A to Z of South East Asian Orchid Species Vol 2 O'Byrne 2011 photo fide

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