POLYPODIUM. 



241 



of the upper half of the frond quite to the extremity, where it is more or less 

 branched. — Lowe^ Our Native Ferns, i., t. 7a ; New and Rare Ferns, t. 26b. 

 Nicholson, Dictionary of Gardening, iii., p. 195. 



P. Y. dentatum — den-ta'-tum (toothed), Monkman. 



This extremely handsome, large-growing variety, whose fronds often attain 

 l^ft. in length and Sin. or 9in. in breadth, was originally found growing upon 

 a bridge in the grounds of Fountains Abbey, Ripon, Yorkshire. In general 

 outline it somewhat resembles P. v. acutum, but when well established has its 

 leaflets, especially the lower ones, very deeply toothed and sometimes forked. 

 — Lowe, Our Native Ferns, i., iig. 17. 



P. Y. dentrculatum — den-tic-ul-a'-tum (small -toothed), Moore. 



A variety with fronds of normal size and shape, but with leaflets 

 showing small teeth on their margins. It has been found near Hereford, 

 and near Hutton Railway Bridge, in 

 the neighbourhood of Malton ; and, 

 according to Moore, a very similar 

 plant is also found in Portugal and 

 in North America. — Lowe, Our Native 

 Ferns, i., fig. 18. Moore, Nature- 

 printed British Ferns. 



P. Y. elegantissimum — e-Ieg-an- 



tis'-sim-um (most elegant), 



Moore. 



This variety (Fig. 68), though 



closely related to P. v. cornuhiense, 



is quite distinct from that form, its 



fronds being broader and much more 



finely divided. It also produces now and again some fronds partly like 

 the species and partly compound, but very seldom reverts to the type, 

 like P. V. cornuhiense does. The name elegantissimum is also applied to 

 cornuhiense. — Nicholson, Dictionary of Gardening, iii., p. 195. Druery, Choice 

 British Ferns, p. 120. 



VOL. in. li 



Fii. 68. Polypodium vulgare elegantissimum 

 (I nat. size). 



