Paphiopedilum gratrixianum (Masters) Guillaumin
- Described: Masters in Gardener's Chronicle, 3rd series, 37: 76-77, fig. 35 (1905) - based on plants exhibited by Mssrs. Sander & Sons who had imported them from Annam, Laos, where they had been collected by Wilhelm Micholitz
- Transferred: Guillaumin in Bulletin de la Societe Botanique de France, 4th series, 24: 548-558 (1924)
- Etymology: Named for Mr. S. Gratrix of Manchester, England.
- Varieties & Forms: none
Paphiopedilum affine - De Wildeman in La Tribune Horticle, 1: 57 (1906) - correct status of taxon unclear
- Chromosome Count -
- Leaves: 4-8, up to 30 cm long, 2-4 cm wide, above green, below purple-spotted at base
- Inflorescence: 1-flowered, up to 35 cm long, green, finely purple-pubescent
- Bloom: 7-12 cm wide
- Distribution -
- Elevation: 900-1100 m
- Peak Flowering in the Wild: October-December
- Ecology: closed evergreen forest on steep slopes and cliffs of granite, gneiss, and rhyolite mountains
- Mean Temperature Range: 9-22° C
- Light: light-moderate shade
- Medium: acidic, calcium-free, humic, silicate soils with a high moisture content
- Water (D-drier, M-moderate, W-wetter) - from Averyanov, 2003: "They lack a dry period due to the constant formation of heavy clouds and mists during winter and early spring that is usually the dry season in northern Vietnam."
- From Christenson, 2004: "The plants that have been called P. gratrixianum consistently in botany (Seidenfaden, 1992) and in horticulture (Gruss, 1994) are correctly P. affine described by DeWildemann in 1906 based on plants thought to have come from Tonkin in Vietnam. In addition to having quite different leaf proportions, these two species differ in their overall stature and pigmentation of the leaves. In P. gratrixianum the inflorescences are about half the length of the distinctively long scapes of P. affine, a feature which is conspicuously dominant in the hybrids of the latter. While both species have purple markings on the undersides of the leaves toward the base, the patterns are different. In P. gratrixianum the purple markings are distributed in a dense field of uniform marbling. Paphiopedilum affine, in contrast, has a less dense, nonuniform field of pigment that is punctuated by conspicuous bold spots, spots which are totally absent from P. gratrixianum."
- Averyanov, L. et al. Slipper Orchids of Vietnam. Portland, OR: Timber Press, 2003.
- Braem, Guido J., and Guy Chiron. Paphiopedilum. Saint-Genis Laval, France: Tropicalia, 2003.
- Christenson, Eric A. "The Rediscovery of Paphiopedilum Gratrixianum." Orchid Digest 68, no. 3 (Jul/Sep 2004): 146-147.
- Cox, A.V. et al. "Genome Size and Karyotype Evolution in the Slipper Orchids (Cypripedioideae: Orchidaceae)." American Journal of Botany 85, no. 5 (May 1998): 681-87.
- Cribb, Phillip J. The Genus Paphiopedilum. Kota Kinabalu, Malaysia: Natural History Publications in association with Royal Botanic Gardens, Kew, 1998.
|Paph. gratrixianum x
||Lawless Jungle Joy
Return to the Data Sheets Page
Page Created By: Stephen Manza
Last Updated: 7-22-06