HOW TO KNOW THE SEAWEEDS 



34a Growing point sunken in an apical pit. Fig. 56, and surrounded 

 (at least when actively growing) by long or short hairs. (See Fig. 

 18c) 37 



B 



Figure 56 



Fig. 56. Laurencia sp. 



A cystocarpic branchlet (A.), and a tetrasporic branchlet (B.) to 

 show apical pit of mature branchlets after the hairs, which originally 

 surround the apical cell, have fallen away, X 23. 



34b Growing point not sunken in an apical pit 



35 



55 



