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Weedy looking orchid

This is a discussion on Weedy looking orchid within the General Orchid Culture forums, part of the Orchid Culture category; Arundina is not native to Central America. From your description and size, maybe it is ...

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  1. #11
    paphioboy is offline Senior Member
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    Arundina is not native to Central America. From your description and size, maybe it is a species of Dimerandra (D. stenopetala)?

  2. #12
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    Apparently Arundina has naturalized in many parts of the world including Central America and is even treated as a nuisance in some places. I don't think it is stenopetala but I am going to check out that genus as the plant is very small compared to Arundina to have bloomed because the old flower stocks are so thin. Thanks again!

    ---------- Post Merged at 05:26 AM ----------

    Quote Originally Posted by Yug View Post
    Other Arundina species will flower when that size, but a typical A. graminifolia is usually about 4 ft or more when it blooms unless stunted by harsh conditions.
    I thought graminifolia was the only species in the genus?

  3. #13
    paphioboy is offline Senior Member
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    Quote Originally Posted by Chris in Hamilton View Post
    I thought graminifolia was the only species in the genus?
    There is arundina caespitosa from Vietnam, which is miniature and hybrids and backcrosses have been made between this and graminifolia which flower at a small size (30-40cm or less).

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    Whoa! I think you nailed it! The grower must have been mistaken about where this came from. I noticed many of his plants were mislabeled or not labeled. He had started concentrating on Paph. later in life and those were in good shape but everything else pretty much went to pot. Thanks again Li!

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    This is definitely not Dimerandra. I've killed enough of them to know what they look like.

  6. #16
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    Quote Originally Posted by PaphMadMan View Post
    This is definitely not Dimerandra. I've killed enough of them to know what they look like.
    No, but possibly Arundina caespitosa?

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    Arundina caespitosa isn't universally accepted as more than a subspecies of graminifolia. Since graminifolia is a variable species, and there are apparently hybrids between the (species or subspecies), and I doubt anyone knows what form(s) account for all the naturalized populations around the world, it is likely that it would take flowers and a truly professional opinion to make such a determination. Since this is not growing wild in unfettered natural conditions, and all species are variable, if it happens to bloom at a size that is less than average for a fully mature graminifolia that is hardly conclusive. Out of billions of plants of Arundina graminifolia tipo worldwide, some are blooming at this size. No criticism of anyone's suggestions, the casepitosa form is worth noting, but far less likely without knowing origin.

  8. #18
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    Quote Originally Posted by PaphMadMan View Post
    Arundina caespitosa isn't universally accepted as more than a subspecies of graminifolia. Since graminifolia is a variable species, and there are apparently hybrids between the (species or subspecies), and I doubt anyone knows what form(s) account for all the naturalized populations around the world, it is likely that it would take flowers and a truly professional opinion to make such a determination. Since this is not growing wild in unfettered natural conditions, and all species are variable, if it happens to bloom at a size that is less than average for a fully mature graminifolia that is hardly conclusive. Out of billions of plants of Arundina graminifolia tipo worldwide, some are blooming at this size. No criticism of anyone's suggestions, the casepitosa form is worth noting, but far less likely without knowing origin.
    Agreed! Maybe I'm just hoping it will stay small

  9. #19
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    An update on the weedy looking thing. Or perhaps 'weed' would be more appropriate. In flower now and they are about 5/16" across. Any ideas?

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    Last edited by Chris in Hamilton; November 21st, 2016 at 06:06 PM.

  10. #20
    paphioboy is offline Senior Member
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    Seems like all our guesses were wrong. lol Looks like a dendrobium or Eria of some sort.

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