Page:Parsons How to Know the Ferns 7th ed.djvu/249



, 34

Archegonia, 34

Alternation of generations, 33

Asexual generation, 34

, 28

Fertile frond, 3

Fertilization, 34

, 31

frond, 30

frond, 29

Pinnæ, 30

Pinnules, 30

Prothallium, 34

, 30

Rootstock, 28

generation, 33

Simple frond, 29

Sori, 30

Sporangia, 30

Spore, 30

Sterile frond, 31

frond, 30

, free, 30