FLORA OF THE EAST RIDING OF YORKSHIRE. 221 



1.S93. Lastrsea Filix-mas. P/vs/., 112. 



(Male-fern). 



Native, Brit., 1-7 July, lY. 



In all the districts, but, like most of the other ferns, not 

 at all abundant in the East Riding, except in some of the 

 woods, and chiefly west of the Wolds. 



1896. L. cristata. Prrs/., 10. 



Native, Eng., 5, 6, 7. August, I\'. 



Very rare. Only in one place, in Derwent-land — Kennv- 

 thorpe Moor (M.B.S.). Probably also in CliffWood Q.J.M.'), 

 but 1 have not seen a specimen from the last place. A form, 

 or species gathered by C.W. and the author in September, 

 igoo, on Skipwith Common, coines ver}' near this species, or 

 Z. iili's'niosa. 



189S. L. spinulosa. Pn-sl., 83. 



Native, Eng. , i, 2, 6, 7. August, I. 



Frequent. Scots Bog Wood, Cottingham (G.N.), and in 

 Houghton Woods with the next species, 1888 (V.N.U.),""' 

 Birkhill Wood, igoi.* 



1899. L. dilatata. Pi-csL, 77. 



Native, Brit., 1-7. 



More frequent than the species immediately above, in 

 Houghton Woods* ; Houghton and Cottingham Commons 

 (G.N.); near Leckonfield, 1897,* and Swine, 1899.* 



1901. Polypodium vulgare. Linn., 112. 



(Common Polypody). 



Native, Brit., 2, 6, 7. August, II. 



Not common, but occasionally on old hawthorn hedge- 

 rows. Haltemprice Lane and Swine (G.N.); Routh, 1888*; 

 near Market Weighton, 1899.* 



