phyllon

noun2

1. •
   A leaf, or something (flat) resembling a leaf.

   • In this following the analogy of phyton already appropriated for the integer of the axis plus the phyllon or phylla it bears. — 1868
2. •
   (historical) A specific herb which the ancient Greek Theophrastus asserted could influence the sex of a fetus.

   • The female phyllon plant ensures the conception of issue of the same sex, while the male plant, differing only in its seed, brings about […] — 1922