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yves

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Posts posted by yves

  1. Hi Gary

    It seems cuttings go through 2 phases, first: production of roots from the piece of petiole.

    That's the case of first picture. Then there is  production of a little tuber, 0.5 - 1cm diam.

    The first stem is producted by this little tuber. At the begining, there is just a green eye on the tuber and a few roots

    start to grow at the base of this green shoot. Only after these roots develop, the stem will start to grow. So,  when stems grow, there is already a tuber.

    Tropicbreeze:

    I don't agree with you, the first step of growth is dead easy, there is no dormancy and stems will grow one after another. (one to one and a half year)

    Problems arrive with the first real dormancy, tubers dry very fast if kept to dry but also rot fast if kept to wet. In addition, tuber will awake when it wants.

    On my experience, longer is the dormancy, tougher is the awakening.

    Yves

  2. Hello

    After 6 months finger crossed, I had the chance to succeed in A, titanum leaf cutting.

    Nothing really new, I just followed this recipe : http://forums.gardenweb.com/discussions/1686545/amorphophallus-titanum-leaf-cutting

    Cut a part of the leaf the 4th April, in July I was obliged to repot the cuttings because of a substrate  gnat infestation, just took the opportunity to take a pic.

    5 rooted leaf portions out of 7, then I had to wait 2 more months before the first stem appeared.

    Yves

     

    DSC_0846_zpsrgfxz7i5.jpgDSC_0202_zpszvjoo68i.jpg

    • Like 1
  3.  Hi Fernando

     

     You are absolutely right,

     It is interesting to see the morphological differences between both clones.

     It would be interesting as you said, to collect some more field data.

    On my opinion, despite it doesn't form plantlets at the top of leaves,

    it is more related to P. medusina regarding the shape of flower.

     

     Yves

  4.  Dear Fischermans

     

     I don't agree with you. There are many differences between both of them.

     It is at least a subsp.

     P. heterophylla grows on clay, P. spec. Tonala on gypsum.

     P. spec. Tonala doesn't form large leaves at the beginning of growing period.

     The shape of flower is quite different.

     

     Yves

     

     compar_zps7042d7af.jpg

     

    compar1_zpsd0189d07.jpg

     

    compar2_zpsa02a1dc9.jpg

     

    compar4_zps4d6711d7.jpg

  5. Hi

    Never try another acid, because sulfuric acid works very well.

    Don't think acetic acid will work, not strong enough certainly hydrochloric acid

    will also work. Many seeds can germinate only after having beeing eaten by birds.

    ( that's why I try with sulfuric acid, it is not as smelly as hydrochloric acid).

    Yves

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