EXPLANATION OF PLATES 



The photographs of jjlate 31 were taken by Eobert L. Pendleton, and the 

 drawings were all made by Dr. Helen M. Gilkey, under the directions of the 

 writer. 



PLATE 31 



Cumagloia Andersonii (Farlow) Setchell and Gardner 

 A tetrasporic plant profusely branched and showing small disk-shaped 



Cystocarpic plants Avithout bases, a common form with short lateral 



Fig. 1 

 holdfast. 



Fig. 2 

 branches. 



Fig. 3. A group of plants all arising from the same holdfast. 



Fig. 4. A group of small inflated plants, an abnormal condition. 



The plants of this plate were all photographed from dried specimens and 

 reduced one-half. 



[408] 



