

more or 

embry 
ese diagrams which are 
e various protocorms shortly after the differen- 

yos 
resplen represent sectional views of the 
i tion ne the metaco rmat primordia. Haus tral tiame is indicated by — The 
d regi i h i extending 
REH the central region of the sporophore in to the tissue aries es course of 
the primary axis of the metacorm. In Fig. p to 11, the line across each diagram indicates 
All s sa tissue above this point is 
the juncture of protocormal : and metacormal tissue 

originated b their differentiation. 
inditum. - Phylloglossum. 3. ee 4. Pteris. 5. Zeamais. 6. Alisma. 
7. Bursa. 8. phe 9. Cycas. ro. Zamia. tr. Pinus. 
