Indusium
🔬 Anatomy●●● Advanced
A membranous outgrowth of the frond that covers and protects a sorus (a cluster of spore cases) in many ferns; its shape and attachment help distinguish fern families.
A membranous outgrowth of the frond that covers and protects a sorus (a cluster of spore cases) in many ferns; its shape and attachment help distinguish fern families.