248 87. FiLiCES. 



of wMch I have seen in its manuscript state, this very 

 objectionable inconvenience is well obviated by the adop- 

 tion of an arrangement and enmneration of the localities, 

 corresponding with the eighteen provinces adopted in the 

 Cybele. The effect of this course is, that the localities 

 are arranged geographically, instead of being cZis-arranged 

 alphabetically ; each locality mentioned in the book, fol- 

 lowing that near to which it is placed in nature. Alto- 

 gether, perhaps, it may now be said that the geographical 

 and topographical distribution of the Ferns is better 

 known than that of the j)hanerogamous plants. But 

 beyond the Filices and Pteridioides we cannot go. The 

 distribution of the British Cellulares remains unknown, 

 and apj)ears likely long to continue unknown. 



1372. Ceterach officinarum, Willd. 



Area 1 2 3 4 5 6 7 8 9 10 11 12 13 * 15 16. 



South limit in Cornwall, Isle of Wight, Kent. 



North limit in Argyle, Perth, Northumberland. 



Estimate of provinces 15, Estimate of counties 50. 



Latitude 50—57. Enghsh tj^^e of distribution. 



Agrarian region. Inferagrarian — Midagrarian zones. 



Descends to the coast level, in the Peninsula. 



Ascends to 200 yards, more or less, in Trent and Ouse. 



Range of mean annual temperature 52 — 46. 



Native. Rupestral. Scarcely to be designated a com- 

 mon plant, although widely distributed, and recorded for 

 upwards of forty counties. Possibly some of its stations 

 in the northern provinces of England may exceed the 

 midagrarian zone, either by altitude or by proximity to 

 the higher hills ; and its few localities in the Highland 

 provinces are near the horizontal hmit of that zone. This 



