Answer: sorus

AnswerCrossword Clue
SORUSSpore cluster.
SORUSSpore cluster
SORUSCluster on a fern
SORUSFern cluster
SORUSCluster of plant spores
SORUSSpore cluster of a fern
SORUSFern-frond formation
SORUSFern part
sorusa cluster of plant reproductive bodies
sorusone of the clusters of sporangia on the back of the fronds of ferns