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Dendrobium ID?

This is a discussion on Dendrobium ID? within the Cattleyas, Vandas, Dendrobiums IN BLOOM forums, part of the Orchid Photography category; I received this den last year with a collection. It had no ID. It and ...

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  1. #1
    sciencegal's Avatar
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    Default Dendrobium ID?

    I received this den last year with a collection. It had no ID. It and many of the other dens were infested with a miniature mealy bug. It was so tiny that at first I thought something like a thrip was laying eggs until I put it under the microscope. I had to throw out some of the smaller badly infested ones since this mealy bug seemed impossible to get rid of. This den was large so I kept trying while keeping it away from all other orchids. A month ago I got a 10 gallon trash can, filled it with water and added imidacloprid at 1 tablespoon per gallon then submerged the whole thing for a half an hour. I could not believe the huge number of dead ones that came out of every nook and cranny. So far, no more have shown up but it is still isolated.

    I noticed at that time that it had a few keikis and it naturally divided into two divisions, one small and one larger.

    Then I noticed that one of the keikis did not have leaves but buds. The spike/keiki has roots. This morning it looks like they are open but I don't know if they are open all the way. The flowers are only about a half inch in size. Does anyone know what this is? Maybe it isn't a dendrobium.

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  2. #2
    Chris in Hamilton's Avatar
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    That flowering keiki is cool! It looks like one of the Australian species. Can you show a picture of the whole plant?

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    I think it is a kingianum but I will go take a photo of the whole plant - back in a sec.

    ---------- Post Merged at 10:24 AM ----------

    Here is the whole plant - the larger division;

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    Yes, I would agree on kingianum

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    I am so glad some part of it bloomed so I know what it is and its culture. It sure has a nice fragrance.

  6. #6
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    I concur- it looks like a kingianum

  7. #7
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    I think it is more likely Den x Delicatum,a hybrid between Den. kingianum and Den.speciosum.The labellum does not look like Den.kingianum's.
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    Quote Originally Posted by elldee View Post
    I think it is more likely Den x Delicatum,a hybrid between Den. kingianum and Den.speciosum.The labellum does not look like Den.kingianum's.
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    In looking at photos of xDelicatum it could be that. I wonder, too if the blossoms aren't just deformed. They have not opened up any more since and they are on a keiki that is not normal looking. Could the severe mealy infection have caused a deformity?

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    Parasites cause deformities in humans, why not plants? Delicatum is listed as a natural hybrid between D. kingianum and D. tarberi. I think It would be very hard to come up with a hard ID unless you sent a piece to a lab. I have six different kingianums and kingianum hybrids but I really can't tell them apart except for pb size. The pb's range from 4" to 16". They flower in light and dark pink, mauve, light and dark purple and white. The flowers are all similar otherwise. They all require the same care.

  10. #10
    elldee is offline Member
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    There is definitely a deformed flower but it could be an anomoly.Orchids do weird things from time to time.Den.x delicatum has been superseded as a name by x speciokingianum but we Aussies still use the former.Den.tarberi is a synonym for Den.speciosum var.Hillii.
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