Dendrobium tobaense

Dendrobium tobaense 

Dendrobium tobaense                                                                                                                                                    photo C. Solimbergo
taxonomy      described by Wood, Jeffrey James  &  Comber, James Boughtwood
  published in      Lindeyana  8 ( 3 ) : 115    1993
  family Orchidaceae
  subfamily Epidendroideae
  tribe Malaxideae
  subtribe Dendrobiinae
  genus Dendrobium Swartz 1799

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 pine or fir forests in northern Sumatra (Toba Lake, Mt. Dolok) )
  altitude 1500 m Lake Toba (4950 ft)  /  1000 - 1300 m Mt. Dolok (3300 - 4290 ft)

climate informations from Toba (North Sumatra, Indonesia)

    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 1250 m / 4125 ft) :
    Dendrobium tobaense a gr uk
  photoperiod in Toba this orchid bloom with a photoperiod, that varies during the year, from 12 h 10 m' to 11 h 50 m'
  life form epiphyte
  brightness    partial shade
inflorescence     length 2 cm (0.8"), from the upper nodes 
  nr flowers 1
  size single flower  6 L 6 cm  (2.4" L 2.4")
  duration single flower, ≈ 40 days    
  time to bloom from birth, ≈ 120 days   
CITES appendix II

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