Paphiopedilum callosum

Paphiopedilum callosum 

Paphiopedilum callosum                                                                                                                                                 photo C. Solimbergo
     
taxonomy described by (Reichenbach f.) Pfitzer, Ernst Hugo Heindrich
  published in        Botanische Jahrbücher für Pflanzengeschichte und Pflanzengeographie  19 : 40    1895
     
  family Orchidaceae
  subfamily Cypripedioideae
  tribe --
  subtribe --
  genus Paphiopedilum  Pfitzer 1886
  section Barbata  Kränzlin 1897
     
  chromosomes  2n = 32
  metabolism  CAM pathway, stomata of the leaves are open at night. 
    (K.Silvera, L.S. Santiago, J.C. Cushman, K. Winter - International Symposium on Plant Biology, August 2013)
    it is useful give the soluble mineal nutriens, on the roots.
     
native of origins primary mist forests, in Thailand (Loei, Central and Eastern Province, Ping River, northwest, Chiengmai, 
    Me Tun), Cambodia
  altitude 300 - 2000 m  (990 - 6600 ft)
  habitat climate informations from Loei (Loei, Thailand) 
    Köppen climate classification : Aw, tropical savanna climate  (with a dry season and a rainy season)
    the weather station data (temperatures are calculated for an altitude of 1150 m / 3800 ft):
    Paphiopedilum callosum b gr uk
  photoperiod  in Loei this orchid blooms with a photoperiod, which varies during the year, from 13 h 09 m' to 10 h 51 m'
  life form geophyte in debris of leaves on soils rich in silicates or granite rocks 
    to bloom induction, need a december rest   (Lance A. Birk)
  brightness    partial shade to low
     
inflorescence     length 14 - 16 cm  (5.6" - 6.4"), from the base of the leaves  
  nr flowers 1 - 2
  size single flower  8 L 7 cm  (3.2" L 2.8")
  duration  single flower 60 days     
  time from birth to bloom, about 70 - 80 days
     
CITES appendix  I

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