2 4 



PLANT LIFE. 



Fig. 30. Fig. 31. 



Fig. 30.— One coenocyte from a branch of Cladophora, showing fifteen nuclei. cA, 



chloroplasts ; k, pyrenoids ; a, starch-grains ; », nuclei. Magnified 270 diam. — 



After Strasburger. 

 Fig. 31 — Part of a plant of CaulerJ>a. See text, f 29. Two-thirds natural size. 



— After Sachs. 



Fig. 32.— Acetabularia. A, an entire plant, natural size — After Woronin. B, dia- 

 grammatic longitudinal section through the upper end of the stalk and the um- 

 brella-like circle of crowded branches which grow together ; «, scars left by fall of 

 an earlier whorl of short branches ; r, «/, rudimentary branches ; C, the base of 

 stalk showing rhizoids for attachment, f % and for storage, b. Magnified 20 diam. — 

 After De Bary and Strasburger. 



