sporophyl

from The Century Dictionary.

• noun In botany, the leaf or leaf-like organ which bears the spores, or receptacles containing the spores, in many of the vascularcryptogams.
• noun In algol., a leaflet-like outgrowth upon which occur the sporangia, arising below the large terminal blade in Alaria and other closely related genera of the Phæophyceæ.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• noun leaf in ferns and mosses that bears the sporangia