electronmicrograph of Helminthostachys zeylanica eusporangium showing sporangial wall cells (SWC), tapetum (T) and sporocytes(Sp)	electronmicrograph of young sporocytes (Sp) of Helminthostachys zeylanica	electronmicrograph of young sporocytes (Sp) of Helminthostachys zeylanica during cell wall deposition and showing plasmodesmata (pd)
electronmicrograph of early plasmodial tapetum (T) adjacent to young sporocytes (Sp) of Helminthostachys zeylanica eusporangium	electronmicrograph of older sporocytes (Sp) of Helminthostachys zeylanica showing cell walls (CW), lipid bodies (l), nuclei (N), plastids (pl) and vacuoles (va)	electronmicrograph of Helminthostachys zeylanica spore tetrad (ts) surrounded by plasmodial tapetum (p) and showing exospore layer (ex2)