POLYPODIUM. 247 



narrow fronds have their lower leaflets pretty uniformly divided, and all 

 are finely toothed, especially towards the summit.— Zoz^e, Our Native Ferns, 

 i, fig. 31. 



P. Y. serrulatum— ser-rul-a'-tum (small-toothed), Moore. 



A dwarf variety, with fronds of normal outline. It was simultaneously 

 found in Devonshire and near Malton, growing on trunks of trees. It is 

 distinguished by the teeth of the leaflets being very minute. — Lowe, Our 

 Native Ferns, i., fig. 32. Moore, Nature-printed British Ferns. 



P. Y. sinuatum — sin-u-a'-tum (waved), Moore. 



This variety, originally found at Tunbridge Wells, is allied to 

 P. V. Interrwptum. Its fronds are short and broad, and the leaflets, long 

 and undulated at their edges, are rarely ever divided at their summit. — Lowe, 

 Our Native Ferns, i., fig. 33. Moore, Nature-printed British Ferns. 



P. Y. S. Monkmanii^ — Monk-man'-i-i (Monkman's), Moore. 



A very dwarf-growing and extremely variable form, originally found 

 at Hest Bank, Morecambe Bay. Its fronds vary as widely as possible in 

 general appearance, being depauperated, multifid, laciniated, interrupted, and 

 in other respects very irregular. The leaflets are often much shortened, 

 forked, notched, cleft, and occasionally united throughout, sometimes totally 

 wanting. — Lowe, Our Native Ferns, i., fig. 34. 



P. Y. trichomanoides — trich-om'-an-o-i'-des (Trichomanes-like), Moore. 



This variety, whose origin is practically unknown, though it is supposed 

 to be a break from P. v. cornuhiense, is undoubtedly the most beautiful 

 of its section. All that is known about its first appearance is that it 

 was brought from the South of England by Messrs. J. Backhouse and Sons, 

 who distributed it about 1873. Its beautiful fronds, Iffc. or more in length, 

 are of a slightly arching habit ; they are highly compound, every leafit 

 being so divided and lacerated that, instead of the usual flat surface, the 

 frond is converted into a plumose mass of most delicate and charming 

 appearance. — R. Potter, Gardeners' Chronicle, 1884, p. 435. Druery, Choice 

 British Ferns, p. 121. 



