Frond Parts
A frond tip or apex
B pinnae
C rachis
D basal pinnae
E stipe or petiole
F rhizome
G blade
H frond or leaf
I blade
J crosier or fiddlehead
K pinna
L stipe or petiole
M rhizome
N roots
Pinna Parts
O pinna stalk
P pinnule
Q costa
R costule
S rachis
T-V ultimate segments
Drawings by Anna Stone from
Hawai`i's Ferns and Fern Allies
, Daniel D. Palmer, 2003.