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Paphiopedilum hirsutissimum var. esquirolei (Schlechter) Karasawa & Saito

• Described: Schlechter in Fedde, Repertorium specierum novarum regni vegetabilis, Beihefte, 4: 39-40 (1919), based on plants collected in the Chinese province of Guizhou
• Transferred: Karasawa & Saito in Bulletin of the Hiroshima Botanical Garden, 5: 1-69 (1982)
• Etymology: Named for J. Esquirol, who collected the first plants
• Varieties & Forms:
  Paphiopedilum hirsutissimum var. esquirolei fma. viride Gruss & Roeth in Caesiana, No. 12: 57-65 (1999)
• Synonyms: none
• Chromosome Count -

  2n =	metacentrics	telocentrics	n.f.
  26	26	0	52

Plant Habit

• Inflorescence: hairs shorter than the typical variety
• Bloom: differs from the typical variety in having longer, slightly narrower petals with a more ovate, acute dorsal sepal
• Plant: can grow to 50+ growths in nature

Habitat Data

• Distribution - this variety inhabits the eastern part of its range
  
• Elevation: 500-1100 m
• Peak Flowering in the Wild: March-May, flowers open with flat, straight petals, but the margins quickly become undulate
• Ecology: vertical and near-vertical limestone slopes
• Mean Temperature Range: 12-23° C
• Light: light shade
• Medium: C, pH 7-7.86, leaf litter rich in humus
• Water (D-drier, M-moderate, W-wetter) -

  Month

  Jan

  Feb

  Mar

  Apr

  May

  Jun

  Jul

  Aug

  Sep

  Oct

  Nov

  Dec

  Water

  D

  D

  M

  M

  M

  W

  W

  W

  W

  M

  D

  D

Sources:

• Averyanov, L.V. et al. "Endangered Vietnamese Paphiopedilums, Part 4. Paphiopedilum hirsutissimum var. esquirolei and var. chiwuanum." Orchids 66, no. 4 (Apr 1997): 378-83.
• 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.
• Cribb, Phillip J. The Genus Paphiopedilum. Kota Kinabalu, Malaysia: Natural History Publications in association with Royal Botanic Gardens, Kew, 1998.
• Gruss, O. "Albino Forms of the Slipper Orchids." Orchid Digest 69, no. 4 (Oct/Dec 2005): 204-29.
• Karasawa, K. "Karyomorphological Studies in Paphiopedilum, Orchidaceae." Bulletin of the Hiroshima Botanical Garden 2 (Mar 1979): 1979.
• Tsi ZhanHuo et al. "A Preliminary Report on the Population Size, Ecology, and Conservation Status of Some Paphiopedilum Species (Orchidaceae) in Southwest China." Lindleyana 14, no. 1 (1999): 12-23.

Primary Hybrids - register as P. hirsutissimum

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Page Created By: Stephen Manza
Last Updated: 7-21-06
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