THE FLORA OF GUERNSEY. 151 



A. Trichomanes, L. Rare. Noted in I., III., VIII. and X. 



A. Ruta-muraria, L. Rare generally, but more frequent in IX. and X. 



Grows on all the country churches or church -yard walls, except V. 

 Athyrium Filix-fcemina, Roth. Common. 



Ceteraeh offieinarum, Willd. Very rare. Noted in VI., VIII. andX. 

 Seolopendrium VUlgare, Sym. Very common. 

 Polystiehum ailgulare, Presl. Rare. Noted in II. and III. 

 Lastraea Filix-mas, Presl. Rather common. 

 L. dilatata, Presl. Rare. Noted in II., IV., VI., VII. and VIII., but 



always sparingly. 



Polypodium VUlgare, L. Common. 



Gymnogramme leptophylla, Desv. Very rare. Only known in the one 



habitat in VII., where it was discovered by Mr. Derrick in 1877. 

 Osmunda regalis, L. Very rare, and now almost extinct. Still exists 



wild, though very sparingly, in VI., VII. and VIII. 

 Ophioglossum VUlgatum, L. Rare. In several fields near the cliffs 



between Corbiere and Creux Mahie. In moist meadows at Grandes 



Rocques, Cobo, and Vazon. Var. polyphyllum. Very rare. L'Ancresse 



Common. 



0. lusitanieum, L. On the southern cliffs. In III. I have noted sixteen 

 stations for this fern between Petit Port and Petit Bot ; one station only 

 in IV., and I have failed to find any trace of it to the westward of the 

 Gouffre. 



EQUISETACE^E. 



Equisetum arvense, z. Frequent. 



E. palustre, L. Grande Mare and neighbourhood. Petit Bot. Var. poly- 

 stachion. Grande Mare Lane, scarce. 



E. limosum, Sm. Wet meadow, King's Mills. Meadows adjoining Grande 

 Mare. 



SELAGINELLACE.E. 



Isoetes Hystrix, Bur. In several parts of L'Ancresse Common. Our form 

 is the var. subinermis. 



CHARACEiE. 



Chara fragiliS, Desv. Grande Mare. Pool near Fort Doyle. Var. 



barbata. Grande Mare. Var. capillacea. Quarry pool at the eastern 



side of L'Ancresse. 

 C aspera, Willd. Grande Mare. Var. subinermis. Grande Mare. 

 C baltiea, Bruz. Var. affinis. Grande Mare. 

 C. vulgaris, L. Pool near Fort Doyle. Var. papillala. Road-side pool on 



the eastern side of L'Ancresse. 



Nitella translueens, Ag. Ditches behind Ivy Castle. 



