CRYPTOGAMIA— FILICES. Cystea. 287 



V. 3. 338, has thriven well, in a common garden pot, plentifully 

 supplied with water, for above seven years. I sowed at the 

 same time what appeared, if not another species, a striking 

 variety, from Derbyshire also } but the produce of both pots 

 was precisely the same. 



2. C. dentata. Toothed Bladder-fern. 



Frond oblong-lanceolate, doubly pinnate; leaflets ovate, 

 obtuse, pointless, bluntly toothed, partly pinnatifid. 

 Partial midribs bordered. Masses crowded ; finally 

 confluent. 



Polypodium dentatum. Dicks. Cnjpt.fasc. 3.1.^.7. H. Sicc.fasc.5. 



16. With. 776. Hull 238. 

 P. n. I 702. Hall. Hist. v. 3. 14 ? Yet perhaps not Aspidium Pon- 



tederce, Willdenow's ?j. 124. 

 Cyathea dentata. Fl. Br. 1 141. Etigl. Bot. v. 23. t. 1588. Davies 



Welsh Botanol. 99. 

 Aspidium dentatum, Sw. Syn. Fil. 59. Willd. Sp. PL v. 5. 273. 



Hook. Scot. p. 2. 155. 

 Filicula alpina, foliolis rotundioribus et crenatis. Segu. Feron. 



Suppl. o4. t. ].f.2. 



In the clefts of alpine rocks, in Scotland and Wales. 



On rocks in the Highlands of Scotland. Dickson. At the foot of 

 the walls of Castle Dinas Bran, Flintshire ; and at Llangollen, 

 Denbighshire ; also in Anglesea. Rev. H. Davies. On Snow- 

 don. Mr. Griffith. 



Perennial. July. 



Rather smaller than C.fragilis, but agreeing with it in texture, 

 colour, and general aspect. Root tufted, small. Frond for 

 the most part correctly bipinnate, a few of the lower leaflets 

 only, in luxuriant specimens, being pinnate, or pinnatifid. 

 The lenjlets are exactly ovate, or rounded, obtuse, pointless, 

 copiously and bluntly serrated, or toothed ; their ribs wavy; 

 their base not decurrent, though seated on a winged midrib. 

 Masses prominent, at length entirely confluent, of a uniform, 

 rich, chesnut brown. I do not perceive, in the younger ones, 

 that peculiar blackness which is observable in the foregoing. 

 The cover is short, jagged, concave, I have never seen it in an 

 early state, before bursting. 



Prof. Hoffmann, in his Flora Germanica, adverts to this plant 

 under C.fragilis, but I think he possibly may never have seen 

 a specimen. It does not answer to any of his figures of sup- 

 posed varieties of that species, in Roemer and Usteri's Maga- 

 zine. The ovate shape, and indentations, of the leaflets are 

 very characteristic, differing from all varieties of the /rogifc, 

 and still more from every other species, whether British or 

 exotic. 



