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cataphyll -- In cycads, a scale-like modified leaf which protects the developing true leaves.
columella -- A small column of tissue which runs up through the center of a spore capsule. It is present in hornworts, mosses, and some rhyniophytes.
cataphyll search for term- n. (L. from cata, and -phyll) any rudimentary leaf, as a bud scale, preceding the true foliage leaves.cataphyllary leaves search for term- rudimentary or scale-like leaves which act as a covering of buds.
 See also: Plant, Leaf, Rhizome, Cotyledon, Shoot
  
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