I'm not certain how deeply they penetrate the wood--if they actually "grow into" it or not, but they do form a very sturdy attachment. I recently tried to remove a bromeliad from a piece of Malaysian drift wood that had been on this for about 6 months or less and couldn't budge it without injuring the base of the plant. There's an article I read recently that was a study on bromeliad attachments. I will need to find this again, but off hand I recall them mentioning something about special cells or structures of some sort. I'll see if I can find this again for you.
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Patty
Pahsimeroi, Idaho

Dendrobates: auratus blue, auratus Ancon Hill, tinctorius azureus, leucomelas. Phyllobates: vittatus, terribilis, lugubris. Epipedobates: anthonyi tricolor pasaje. Ranitomeya fantastica, imitator, reticulata. Adelphobates castaneoticus, galactonotus. Oophagia pumilio Bastimentos. (updated systematic nomenclature)

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