Dendrobium canaliculatum, var. nigrescens

Dendrobium canaliculatum

Dendrobium canaliculatum, var nigrescens                                                                                                            photo C. Solimbergo
     
taxonomy described by       Brown, Robert
  published in      Prodromus Florae Novae Hollandiae  222    1810
     
var. nigrescens    described by Nicholls, William Henry
  published in  Australian Orchid Review  7 : 40    1942
     
  family Orchidaceae
  subfamily Epidendroideae
  tribe Malaxideae
  subtribe Dendrobiinae
  genus Dendrobium Swartz 1799
     
  chromosomes  2n = 38 
  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 on trunk or on branches next to streams' water in Australia (Queensland, from Cairns to Cape York), Papua 
  altitude 0 - 760  m  (0 - 2500 ft)
  habitat climate informations from Mareeba (Queensland, Australia)
    Köppen climate classification : Cfa, humid subtropical climate in all seasons, with very hot summers
    the weather station data (temperatures are calculated for an altitude of 400 m / 1320 ft) :
    Dendrobium canaliculatum a gr uk
  photoperiod in Mareeba this orchid bloom with a photoperiod, that varies during the year, from 13 h 08 m' to 10 h 52 m'
  life form epiphyte
  brightness    sunny to full sun
     
inflorescence    length 20 - 30 cm (8" - 12"), from the upper nodes 
  nr flowers 18 - 29
  size single flower  3 L 4 cm  (1.2" L 1.6") - inflorescence  8 L 9 cm  (3.2" L 3.6")
  duration inflorescence40 days
  time to bloom from birth, ≈ 60 days     
     
CITES appendix II

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