58 CALIFORNIA ACADEMY OF SCIENCES. [Proc. 3D Ser. 



EXPLANATION OF PLATE VIL 



Nitophyllu m ruprech tia nn m . 



Fig. 26. Typical plant, showing stalk, branching, venation, proliferations, 

 and sori on proliferations. One-third natural size. 



Fig. 27. Portion of frond, showing flabellately disposed sori. One-third 

 natural size. 



Fig. 28. Same, showing sori (linear) confined to apices of branches. One- 

 third natural size. 



Fig. 29. Weathered frond, cystocarpic, with prostrate frond. One-third 

 natural size. 



Fig. 30. Portion of frond, showing linear sori confined to ends of branches 

 and rounded sori on marginal proliferations. One-third natural 

 size. 



