Arachnis calcarata, subsp longisepala

not yet in bloom
Arachnis calcarata subsp longisepala        
taxonomy        described by Holttum, Richard Eric 
  published in      Sarawak Museum Journal  5 : 172    1949
subsp longisepala     described by  Wood, Jeffrey James 
  published in  Orchid Review  89 (1050) : 113    1981
  Family Orchidaceae
  Subfamily    Epidendroideae
  Tribe Vandeae
  Subtribe Aeridinae
  Genus Arachnis  Blume 1825
  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 origin forests in Malaysia on the trunks of trees (Borneo, Kinabalu, Lahad, Datu)
  altitude ≈ 610 m (1800 - 2013ft)               
  habitat climate informations from Tambunan (Borneo, Sabah, Malaysia)
    Köppen climate classification : Af, humid tropical climate of the rainforest
    (no winter season, more abundant rainfall)
    the weather station data (temperatures are calculated for an altitude of 600 m / 1980 ft) :
    Arachnis calcarata a gr uk
  photoperiod  in Tambunan this orchid bloom with a photoperiod, that varies during the year, from 12 h 23 m' to 11 h 37 m'
  life form epiphyte
  brightness partial shade
inflorescence    length  
  nr flowers  
  time to bloom from birth, ~ days
CITES appendix II

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