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Dendrobium information request

This is a discussion on Dendrobium information request within the Genus Specific forums, part of the Orchid Culture category; I have been reading about some of the dendrobium flowers here and there. I recently ...

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  1. #1
    IdahoOrchid's Avatar
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    Default Dendrobium information request

    I have been reading about some of the dendrobium flowers here and there. I recently "assisted" my MIL with hers and got it to flower. Last year I got flower buds, but no flowers. This year I got one bud and had a OS friend put it in his greenhouse and we are now watching the spike extend and the bud swell.

    I understand there are different types of dend that require different culture steps for health and flowering. Could someone please explain these differences and how to identify the plants that need them?

    Oh, the name on my plant is Rinnapa. I will chech the RHS site for information, but if someone else knows of or can find information please jump in. I have a pic I pulled off the internet.

    Thanks

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    Murray has done some good work here on Dendrobiums:

    http://www.rv-orchidworks.com/orchid...ead.php?t=4583

    Also, check out the sub-categories under general information here: http://www.rv-orchidworks.com/orchid...splay.php?f=56

    Cheers,
    BD

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    Hi Steven,

    The difficulty with Dends is that the genus is huge and the cultural requirements vary widely. The genus breaks down into sections, and species within a section tend to have similar requirements. So learning how care for a particular Dend is largely about understanding which sections were used to hybridize your particular plant.

    There's no Den. Rinnapa that I can find. Might that be a cultivar name?

    Bill Lavarack's book is excellent if you'd like to read more about the genus. There are some other new books out that are good, but I can't afford any more books over $100! His was $24 from the large online bookseller.

    McJulie

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    This is what the tag says, exactly (yes, Diana, EXACTLY!!!)

    JR 240
    -212K Den. Rinnapa #3

    Does that help ID it any?

    The back side says: Bright indirect sunlight, 65-85, water 1 or twice a week, foliar fertilize once or twice a month.

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    The only Den that's remotely close in name is Den. Rungnapa. It's 75% Dend. phalaenopsis and bigibbum, so I'd expect a very round purple flower from it.

    Sorry I can't help more, Steven!

    McJulie

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    Not sure why I could not find the attachement feature when originally posting. This is a picture I found that says it is from the plant in question.
    Attached Images Attached Images  

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    Looks like McTagfinder's hit the mark, again!

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    That sure fits the description! Although without DNA testing there's no way to be sure. But it will certainly help you figure out the best culture for that beauty!

    I know they want a dry winter rest, but I'll let Murray give you the specifics.

    McJulie

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    I will put it this way

    http://www.orchidspecies.com/denbiggibum.htm

    Dendrobium phalaenopsis Fitzg. 1880 - See Dendrobium bigibbum Lindley 1852

    ~Dendrobium phalaenopsis var. compactum C.T.White 1941 - See Dendrobium bigibbum Lindley 1852

    ~Dendrobium phalaenopsis Fitz var. statterianum Hort. ex Sander - See Dendrobium bigibbum Lindley 18

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    Quote Originally Posted by Piper View Post
    That sure fits the description! Although without DNA testing there's no way to be sure. But it will certainly help you figure out the best culture for that beauty!

    I know they want a dry winter rest,
    McJulie
    If it needs a winter rest then why is it blooming and sending up a new growth right now? Also, the spikes (one per cane) are coming directly from the very tip-top end of the canes. the leaves have a very heavy substance, much like a phal and maybe even heavier and they are not deciduous.

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