THE POLYPODIES 



179 



Fig. 202. P. v. camb. Hadwinii. 



C. Barrowii, c. Hadwinii (Fig. 202), c. Oakleys, c. Prestonii 

 (Appendix No. XLIV). — These are all quite distinct forms of Cam- 

 bricum, and very beautiful ; Barrowii is a robust grower with 

 longer and more acutely pointed divisions than Cambricum, and 

 Prestonii is much denser in make ; Hadwinii is a narrow form 

 with blunter divisions, and Oakleyce a smaller grower than the 

 others ; all are perfectly barren. 



Cornubiense. — Found in Cornwall by Mr. White and others, 

 as a result of which it has been also named elegantissimum and 

 Whiteii, the first indicating locality, the next character, and the 

 last one of the finder's names. It is one of our most curious 

 varieties, producing indiscriminately three kinds of fronds, viz. 

 perfectly normal ones, very finely cut ones consisting of tripinnate 

 or even quadripinnate, very narrow segments, and a coarser type 



