24 BRITISH FERNS. — SUB-ORDER II. TRIBES 4, 6. 
3. crispa, Lowe (Dickieana crispa, Tait). A dwarf variety found 
near Aberdeen by Mr. Tait. A copy of Dickieana with crisp 
fronds. 
4. cristata, Lowe. A variety with crested fronds raised by Mr. 
C. El worthy at Nettlecombe. In 1871 Mr. R. Moule of Ilfracombe 
raised another with fronds 8 inches in length in which the fronds 
are very variable, sometimes symmetrically crested, at others 
capitate, ramose, or ramose and crested. Mr. Keale of Wantage 
and Mr. Mapplebeck of Birmingham have raised others, and Mr. 
J. M. Barnes has found it at Sedgwick. 
5. decurrens, Moore. Found near Wemyss Castle, Fifeshire, by 
Mr. Tait of Edinburgh. Pinnae deflexed and distant, pinnules 
decurrent ; characters intermediate between Dickieana and the 
normal form. 
6. dentata, Hooker. A not uncommon variety. Length 4 to 8 
inches, narrow, pinnules somewhat confluent and blunt toothed. 
7. Dickieana, Moore. Found near Aberdeen by Dr. Dickie, 
near Dunkeld by Dr. Balfour, and Isle of Arran (Galway), by Mr. 
D. Moore of Glasnevin. A dwarf form. Pinnae twisted, deflexed, 
and over-lapping, pinnules crowded and overlapping. More 
recently at Mountain near Chepstow, by Mrs. Curre, and in S. Wales 
by Mrs. Bagnall Oakeley. 
8. furcans, Moore. Found at Killin by Mr. S. O. Gray, and on 
Clova by Messrs. Stansfield. It is of the normal type, with the apex 
and a portion of the pinnae forked. 
9. interrupta, Wollaston. Found at Windermere by Mr. I. 
Huddart. Very narrow ; pinnae variable, much depauperated, and 
some wanting ; segments deeply cut and apex truncate. A very 
singular variety. 
10. lineare, O' Kelly. Length of frond 12 inches. A large, lax, 
very narrow frond, with linear segments. Found in the Burren, 
county Clare, by Mr. P. B. O’Kelly of Glanarra House, Bally- 
vaughan. 
11. minutissima, Jones. Origin unknown. A diminutive bushy 
variety, crowded with fronds, but never exceeding 2 or 3 inches in 
height. It came into the possession of Colonel Jones with other 
ferns. 
12. obtusa, Moore. Found in Scotland by Mr. A. Tait, near 
Whitby by Mr. Clapham, Llyn Ogwen by Mr. S. O. Gray, and in the 
Lake district by Mr. Clowes and Mr. Wollaston. Length 12 inches, 
lanceolate, pinnules blunt. 
13. quadrata, Clapham. Found near Rydal by Mr. A. Clapham. 
Length 6 inches, basal pinnae remote, pinnules rounded, and a 
portion, especially the basal ones, flat. Minutely dentate. 
14. sempervirens. Found at Tunbridge Wells, and in Devon, 
but supposed to have been introduced from Madeira. It has a 
short creeping rhizoma, and in a cool greenhouse is evergreen. 
1 5. truncata, Lowe (truncata-interrupta). A truncate form, 
differing from interrupta in having much broader, dilated, and 
rounded apices. 
