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less depauperated, distant, decurrent, and irregular in size, outline, 
and toothing. It was found by Mr. Elworthy, near Nettlecombe, in 
Somersetshire. [Plate XX D.— Folio ed. t. XII C.] 
21. grandidens (M.). A very graceful variety. The fronds are of 
moderate size, narrowly but irregularly lanceolate, the pinne being 
of various lengths, though less depauperated than in either inter- 
ruptum (22), or dissimile (23), which are nearly related forms. The 
pinne very frequently terminate abruptly, either in a fan-shaped 
confluent leaflet, or in a leaflet resembling the ordinary pinnules. 
The pinnules are of different shapes—ovate, oblong, roundish, or 
obliquely wedge-shaped, and are very remarkable from the large 
coarse deeply-cut teeth of the margin (laciniate-dentate), which are 
acuminately setaceous. When fertile the pinnules in the upper part 
of the frond often grow out into irregular sharp-pointed divergent 
angular lobes. The most marked forms of the variety produce very 
narrow fronds, the pinne being all and nearly equally abbreviated, 
the pinnules small, wedge-shaped, with a few coarse angular teeth, 
and the terminal one larger and fan-shaped. Sometimes the pin- 
nules are all larger but of the same laciniate-dentate character, 
The best forms we have seen were found in—Devonshire: Totnes, 
R. Penwill. Somersetshire: Nettlecombe, C. Elworthy—two forms, 
one dwarfer than the other. Ireland: Killarney, S. Jervis. Fer- 
managh: Lisnaskea, Rev. W. R. Bailey. Other slightly varying 
forms come from—Devonshire: Totnes; Barnstaple, C. Jackson. 
Yorkshire: Rolston Scar, R. Fowton—rather more unequal in the 
pinne. Fermanagh, Rev. R. Eccles; banks of Lough Erin, Rev. 
W. R. Bailey. Antrim. [Plate XX B, and XXV A.] 
22. interruptum (Woll.). This is a variety of remarkably irregular 
growth. In its characteristic state the majority of the pinne are 
greatly abbreviated and more or less truncate or abrupt, sometimes 
reduced to the size of ordinary pinnules, while here and there one of 
full length is produced. These longer pinne usually have a portion 
of their pinnules normal, or nearly so, in character, oblong and 
biserrate, while others are reduced to half their size, and roundish 
or ovate in outline without auricles, and wedge-shaped at the base. 
The abbreviated Dinna have their pinnules changed to a roundish 
or ovate form, with incised or laciniated margins. The apex of the 

