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Dendrobium species

Discussion in 'Orchid Identification Section' started by Marni, Apr 18, 2009.

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  1. Marni

    Marni Well-Known Member Staff Member Supporting Member

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    I'm hoping someone knows what this is. The flowers look like a white form of D leucocyanum and the plant looks like D petiolatum. The flowers are about 1/2" (1.25 cm) and the pseudobulb plus leaf is 2" (5cm) tall. The inflorescence can emerge from the top or side of the pseudobulb, no fragrance.
    Dend.tarlow.plant..jpg Dend.tarlow.close..jpg
     
  2. Tom-DE

    Tom-DE Well-Known Member Supporting Member

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    Can't help you with the ID but it is a beauty.
     
  3. mini-catts

    mini-catts Member

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  4. Marni

    Marni Well-Known Member Staff Member Supporting Member

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    Peter, the flowers are definitely similar, but the plant is really different, not only in size but also the shape of the psbs. Thanks for the suggestion and links. Co-incidentally the specimen plant was in the exhibit I did with 3 friends last year at POE, I don't remember for sure, but it was either Judy Carney or Cindy Hill (who told me today that you care coming to the Bay Area).
     
  5. mini-catts

    mini-catts Member

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    Hi Marni, yes your plant habit does seem different. Is it possible that it could be an alba form of petiolatum?
    I will be speaking in Oakland on Monday at the orchid society. My topic is on mini-catts!
    Peter T.
     
  6. Marni

    Marni Well-Known Member Staff Member Supporting Member

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    Ron Parsons has looked at it several times and doesn't know what it is. He isn't impressed with it, but I like it.
     
  7. Marni

    Marni Well-Known Member Staff Member Supporting Member

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    Peter, the flowers are very different from D petiolatum. I have two somewhat different forms of petiolatum, but only have images of one of them which I am posting here.

    I rarely go to the Oakland meetings, but I am considering coming down to hear your talk. It is a bit of a drive for hybrids (nothing personal, you understand).
    dend.petio.generos..jpg
     
  8. Lika[Sweden]

    Lika[Sweden] Svenska

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    Marni I agree with you, you don't have D. petiolatum, since your plant does not have any petiols.
    I have had a look at the book 'Notes from the Royal botanical garden in Edingborough'
    Your plant is problobly from the section Pedilonium and not from the Oxyglossum section. Either it's an D. leucocyanum var. alba, or it's a new species.
     
  9. Tom-DE

    Tom-DE Well-Known Member Supporting Member

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    I don't think it is Den leucocyanum. Den. leucocyanum has completely different growths.
     
  10. Marni

    Marni Well-Known Member Staff Member Supporting Member

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    Thank you all for looking. Any recommendations on a taxonomist I could ask?
     
  11. piotrm

    piotrm Well-Known Member

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  12. vmijct

    vmijct Clif

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    nice.
     
  13. Marni

    Marni Well-Known Member Staff Member Supporting Member

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    Piotr, Thank you very much. You came up with two I didn't know. I feel very comfortable with Dendrobium constrictum ID. The flowers are very similar. From the images, mine might have a slightly wider dorsal sepal, but maybe not. The plant however does look the same.

    The D rupestre looks different in both flower and foliage, but much closer than most of what I've looked at. Definitely something some thing I would like to grow.
     
  14. Lika[Sweden]

    Lika[Sweden] Svenska

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    Hello Marni and Piotr

    I showed this thread to Mikael who is very interested in the Oxyglossum and Pedilonium sections. He says your plant is from the Pedilonium section. And that it could very well be D. constrictum.
    However, the ID D. contrictum must be used with causion. There is much confusions between dwarf forms of D. capituliflorum and D. constrictum. A useful note about this is writen by Peter Byrne here http://www.mail-archive.com/[email protected]/msg02868.html

    Piotr shows a link to Flickr where a plant has the name D. rupestre. This is completely wrong. The plant shown is most likely D. leococyanum (and a very nice plant too).

    Mikael scanned photos of the true D. rupestre for you. I can also send a scan of the text from the same book. Hope this helps.

    afarm4.static.flickr.com_3618_3485992465_47b323cfe1_o.jpg

    afarm4.static.flickr.com_3296_3485992307_ab6f934ebe_b.jpg
     
  15. Marni

    Marni Well-Known Member Staff Member Supporting Member

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    Thank you Linda, and please thank Mikael for his input. I hope at some point he will be interested in posting on OI. He has helped me with identification of a couple of plants and I'm sure we have a lot of the same interests in orchids.
     
  16. Alexis

    Alexis New Member

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    I agree...
     
  17. Forrest

    Forrest Really Neat

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    +3
     
  18. Jon

    Jon Mmmm... bulbophyllum...

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    I think he would make a wonderful addition to the OI community.
     
  19. Tom-DE

    Tom-DE Well-Known Member Supporting Member

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    I would like to see Mikael post here also.
     
  20. Jon

    Jon Mmmm... bulbophyllum...

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    Let's start a petition.