Indusium
Indusium , noun
[Latin, an under garment, from induere to put on: compare French indusie the covering of the seed spots of ferns.]
(a)
(Botany) A collection of hairs united so as to form a sort of cup, and inclosing the stigma of a flower.
(b)
(Botany) The immediate covering of the fruit dots or sori in many ferns, usually a very thin scale attached by the middle or side to a veinlet.
(c)
(Botany) A peculiar covering found in certain fungi.