LIFE HISTORY OF THE FERN 
335 
Figure 306. — Diagram of Life History of Fern. 
O 
—Spores 
c 
Prothalltum / 
1 \ i*— New Fern 
! 
' " r ( 'T* 
1 / : /p W#ri — Attachment 
/ 
F-Protorrema \ / 
) ( °f Fern to 
■ / x//: /# m- Prothallium 
/ /m 
K Wtm 
f b / frt 
V f 11 IV 
• 1 /// k 
V |o 
Rhizoid / •' I 
Archegonia 
'■ Antheridia 
Figure 307. — Sporangia of Fern. 
A, incomplete ring of elastic cells; B, region of thin cells; C, stalk of 
sporangium; D, spores. 
