Y ; 
| TS aL * 
wart 
~ 
MINNESOTA BOTANICAL STUDIES. 
Figure 15. Corallina officinalis L. var chilensis (Kiitz.). Me 
ional section of a conceptacle, showing the tetrasporangia. — 
Zeb. ~. % 
Figures 16-17. Corallina vancouveriensis. 
16. f. typica. 
17. f. densa. 
Figures 18-19. Coradllina aculeata. 
18. A portion of frond. x ca. 4. . 
1g. A young frond found ina brackish pool high above 
mark. 
