Embryo (e), the initial plantlet.
Radicle (r),
the rudimentary stem or first internode.
Cotylēdon (c), the seed leaf at the primary node.
Plūmule (p), the growing points above the cotyledons.
Albūmen (a),
the food for the plantlet’s first growth, stored outside the embryo.
Kinds.—(1.) General Form: Orthotropous,