FILICES. 



253 



958. P. Robertianum, llojfm. Limestone Polypody. 



Native ; on limustone, raro and local. 



In Loigli Wood, raro. Shierclijfs Ouido, 1789. Wc 

 understand that before tlie construction of the 

 Suspension Bridge and its approaches, the high 

 gi-ound on the Leigh side, above Mghtingale VaUey, 

 . was covered with heath, sand, and loose stones ; 

 and that P. Uohertianum gi'ew among the latter. 

 Plentiful at Cheddar. ISrockley. Burrington. 

 Cleeve. Kbbor Gorge ; Miss Liveit. V. VIll. 



LASTR/EA, Prcsl. 



959. L. Thelypteris, Presl. Marsh Fern. 



Native ; in wot peat bogs, very local. 



S. Once seen in a boggy spot between Portishead 

 and Clovedon ; Mr. 11. V. Skerrimj. Abundant on 

 the peat-iuoors at the southern limit of the dis- 

 trict. VII. Vlll. 



960. L. Oreopteris, i'rcsL Stveot Mountain Fern. 



Native; in woods and about heatlis and coirmu)ns, 

 rather rare. 



G. Conham ; Ilerh. Stephens. Hcnbury ; Herb. 

 Powell. 



S. Sparingly in Leigh Wood ; Mr. S. Bootsey ; Dr. 

 'fhwaites; and Mr. T. B. Flower. Ashton Manor 

 Woods; Miss Atwood; Swete, Fl. 96. Portbury. 

 Two or throe plants in Norton's Wood, by Clove- 

 don ; Mr. li. V. Sherring. A great many in a small 

 combo between Cleevo and Brockloy. In some of 

 the combes of Bliickdown. On Mendip near Cran- 

 m.ore Tower, where the old j-ed sandstone occurs ; 

 Pr. II. F. Parsons. VII. 



