sorus

A cluster of sporangia borne on the underside of a fern frond.

A reproductive structure in certain fungi and lichens.

In botany, a heap or aggregation.

One of the fruit dots, or small clusters of sporangia, on the back of the fronds of ferns.

In parasitic fungi, any mass of spores bursting through the epidermis of a host plant.

In lichens, a heap of soredia on the thallus.

Any reproductive structure, in some lichens and fungi that produces spores

A cluster of sporangia on the edge or underside of a fern frond

cluster of sporangia usually on underside of a fern frond