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Oxyglossum Dendrobiums

Discussion in 'Wanted' started by rico, May 9, 2015.

  1. May 9, 2015 #1
    rico

    rico Active Member

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    So, rewind to last summer. I saw a video online and decided to buy a Dendrobium cuthbertsonii from a local-ish nursery. It had a flower that didn't abort and it was starting to open when I went on vacation... But when I got back a squirrel had eaten the whole plant! Any way, fast forward to last month. I went back and bought a replacement. It has been growing nicely, and is already developing two flowers. Well, once I had returned to buy the replacement plant, I found they didn't have as many as last time. They had no D. violaceum for sale as they had all been sold, and the D. subuliferum and D. agathodaemonis were trying to be propagated. Does anyone know any sources for plants like D. delicatulum, D. masarangense, D. cyanocentrum, D. subuliferum, D. sulphureum, D. vexillarius, and others? I prefer not dealing with ebay as many bidders there have considerably more money budgeted for plants than a 14-year-old. Thanks! -rico
     
  2. May 9, 2015 #2
    naoki

    naoki Well-Known Member

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    Ooi Leng Sun had D. subacaule for $20.

    Far East Agriculture had
    D. vexillarius $30 for red and $35 for white
    D. sulphureum $20
    D. violaceum $20

    Both of them come to Redland Fest (and ship to you from FL), but I think it may be a bit too late for pre-order, but you can try contacting them.
     
    rico likes this.
  3. May 10, 2015 #3
    KellyW

    KellyW Orchid wonk Staff Member Supporting Member

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    Rico, the only one I can help with is D. delicatulum. I bought mine from Andy's. Although I haven't bloomed it yet it is probably the white form.
     
    rico likes this.
  4. May 10, 2015 #4
    rico

    rico Active Member

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    Thank you both! I feel like propagation and distribution of this section seems to be going more backwards than forwards with plants just disappearing!
     
  5. May 10, 2015 #5
    KellyW

    KellyW Orchid wonk Staff Member Supporting Member

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    I think a lot of people buy them and aren't able to keep them alive. I have killed 2 cuthbertsonii and now know that I cannot grow the Oxyglossums that need cool conditions. I can grow D. laevifolium, violaceum and delicatulum as they seem to do OK in intermediate conditions. With this group I recommend that you heed the temperature requirements closely, IMO.
     
  6. May 10, 2015 #6
    rico

    rico Active Member

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    I think I will try Andy's delicatulum because that is more intermediate growing and I don't want to immediately dive into the rare and expensive. Thanks! -rico
     
  7. May 10, 2015 #7
    Marni

    Marni Well-Known Member Staff Member Supporting Member

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    You might also check with Darrin Norton of Mountain Orchids.
     
  8. May 11, 2015 #8
    Tom-DE

    Tom-DE Well-Known Member Supporting Member

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    If you have good luck with cuthbertsonii, you might want to try the Den. agathodaemonis(pink variety from Andy's Orchids/not red like the photo). Den. pentapterum is an easy one from the Oxyglossum section.
    Den. delicatulum is not from the Oxyglossum section. It is an okay species(to my taste anyway). If you like tiny ones, go for it.
     
    rico likes this.
  9. May 12, 2015 #9
    rico

    rico Active Member

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    Thanks everyone. Tom, I didn't know D. delicatulum wasn't an Oxyglossum. I guess my books are a little outdated!
     
  10. May 12, 2015 #10
    pacome

    pacome Active Member

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    where did you source this info? Didn't you mess with the almost similarly spelled Dendrobium X delicatum (which obviously isn't an Oxyglossum!)
    I'd be very, very amazed if "they" removed D. delicatulum (parvulum) from Oxyglossum section!!
     
  11. May 12, 2015 #11
    Tom-DE

    Tom-DE Well-Known Member Supporting Member

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    If I mixed up with Den. Xdelicatum, I would not call it tiny, would I?
    Let's say, besides IOSPE, I have read it somewhere last year. With all of the splittings or DNA testing, some of them will be reclassified. Is Oxyglossum still a section of Dendrobium "currently"? I just checked, It is not listed on IOSPE. Has it been lumped into another section of Dendrobium?
    Den. leucocyanum "was" considered as Oxy. Den by some botanist at one time...., I see some similarities on Den. delicatulum, so I am not surprised to see that some experts will take Den. delicatulum out of Oxyglossum. What about Den. petiolatum, should it be an Oxyglossum sp? Somehow, I feel Oxyglossum has a loose definition. So, I am no expert, but let me ask you, what makes a species to be included in Oxyglossum? Should we take the cuthbertsonii group out of Oxyglossum also?
     
    Last edited: May 12, 2015
  12. May 12, 2015 #12
    rico

    rico Active Member

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    Okay, "Dendrobium and its relatives" by Bill Lavarack, Wayne Harris, and Geoff Stocker says that D. cuthbertsonii, D. laevifolium, and D. prasinum are all part of the section Cuthbertsonia Schltr. The section Oxyglossum is composed of about 30 species mainly found on the island of New Guinea... It goes on about distribution, and how the work of Reeve and Woods (1989) clears up some misconception about the related sections Calyptrochilus and Pedilonium, but mentions nothing about Cuthbertsonia. This leads me to believe that they are distinct and there are differences as they apparently would assume no explanation is needed. The species it includes with descriptions (not complete for the section) are, D. brevicaule, D. cyanocentrum, D. dekockii, D. delicatulum, D. habbemense, D. hellwigianum, D. masarangense, D. nebularum, D. pentapterum, D. rupestre, D. subacaule, D. subuliferum, D. sulphureum, D. vexillarius, and D. violaceum.
     
  13. May 12, 2015 #13
    Tom-DE

    Tom-DE Well-Known Member Supporting Member

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    Not to worry, rico. It is all good. No one is going to be certain about what should be included in Dendrobium these days, and we are talking about a small group of species or sections, which it is more "technical" if some may prefer to say so.
     
  14. May 12, 2015 #14
    Tom-DE

    Tom-DE Well-Known Member Supporting Member

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    Is Den. dichaeoides an Oxy. Den.? Some say yes but some say no.

    I always look at cuthbertsonii, prasinum and laevifolium as a separate group although.....
     
  15. May 13, 2015 #15
    Marni

    Marni Well-Known Member Staff Member Supporting Member

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    Den. delicatulum is now considered a synonym of Den. parvulum. Den. delicatulum is in the "Revision of the Dendrobium Section Oxyglossum" T. M. Reeve & P.J.B. Woods, 1989, so definitely has been considered part of the Oxyglossum section. As I understand it though, there is no longer a section Oxyglossum. Several other sections were dissolved but I don't remember all of the details and am a slow learner.:oops:
     
  16. May 13, 2015 #16
    pacome

    pacome Active Member

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    well, following A. Schuiteman's latest book on PNG Dendrobiums, it seems section Oxyglossum is now included in section Calyptrochilus (along with many sp. from former section pedilonum). I think what made the consensus (at one time) was that all species with acute lip and angled to winged ovary were Oxyglossums.
     
  17. May 13, 2015 #17
    Tom-DE

    Tom-DE Well-Known Member Supporting Member

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    I actually don't mind they have lumped some of the sections together, and I used to just call them PNG Dendrobium. Less technical!
    I do have hard time to accept that they put Cadetia and Diplo. all back to Dendrobium though.
     
  18. May 14, 2015 #18
    Marni

    Marni Well-Known Member Staff Member Supporting Member

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    I too have a hard time with the Cadetia and Diplocaulobium, but I must have missed the email where they asked my opinion.o_O