scale leaf

/S K EY1 L L IY1 F/
noun
  1. 1

    A small flat leaf resembling a scale, such as on many conifers.

  2. 2

    A small modified leaf, especially a colorless membranous one, such as on a rhizome or forming part of a bulb.

Source: https://en.wiktionary.org/wiki/scale%20leaf