from The American Heritage® Dictionary of the English Language, 5th Edition.

  • noun A thickened, bulbous portion of the stem in many orchids.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

  • noun A storage organ in orchids, derived from the part of a stem between two leaf nodes.


from Wiktionary, Creative Commons Attribution/Share-Alike License

pseudo- +‎ bulb


  • The flower buds are produced from the apex of the pseudobulb, usually encased in a protective sheath, which dries and splits to allow the developing buds to emerge.

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  • Cattleyas make copious roots, which are a joy when they explode from the base of the newly formed pseudobulb The thick, creeping, woody rhizome connecting the pseudobulbs often resins in the development of new growths the rriimm of the pot, and, when the new roots follow, this can be a problem ice the grower.

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  • When leaves are eventually shed, that pseudobulb has no further use for roots, and they will die naturally.

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