sorus

English Thesaurus

1. cluster of sporangia usually on underside of a fern frond (noun.plant)

hypernym	:	reproductive structure,
definition	:	the parts of a plant involved in its reproduction (noun.plant)

part holonym	:	indusium,
definition	:	a membrane enclosing and protecting the developing spores especially that covering the sori of a fern (noun.plant)

2. a spore-producing structure in certain lichens and fungi (noun.plant)

hypernym	:	reproductive structure,
definition	:	the parts of a plant involved in its reproduction (noun.plant)