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BRITISH FERNS. — SUB-ORDER II. TRIBE 9. 
Group II. Truncate. 
Section a. TRUNCATUM. (Ending abruptly.) 
1. accisum, Lowe. Found in Devon ; and recently at Carron, by 
Mr. P. B. O’Kelly. i2Xi| inches. Normal, except at the apex, 
which terminates in a leafy frill within the frond. 
2. constrictum, Moore. Found in Guernsey by the late Mr. 
James. 6x ii inches. Depauperate ; and naked to stem in centre. 
Very irregular, laciniate, and slightly marginate. 
3. corniculatum, Lowe. From the late Colonel Jones’s collection. 
8x1 inches. Truncate, cornute, rugose (except a broad flat 
rachis) ; the rugose margin j-inch thick. Stipes, 4 e inches. _ 
4. cornutum, Lowe (truncato-cornutum, Mapplebeck). Raised 
in 1872 by Mr. Mapplebeck. 9^x2^ inches. Frond terminating 
in a horn ij inches long. No pouch, hound also in the Lake 
district by Mrs. Hodgson and Mr. J. Crossfield. One raised by 
myself is 6x2 inches ; with wavy margin. 
5. obtuso-dentatum, Moore. Found in 1 85 5 5 near Ilfracombe, by 
Rev. J. M. Chanter. I2 Xi£ inches. Apex blunt, margin having 
uniform dentate crenatures. 
6. O’Kellyi, Lowe (truncatum, O'Kelly). Found at blackhead 
by Mr. O’Kelly, where he also found another small rotund form. 
7. renifonne, [Vilhums. Found in several localities. 4X2 
inches. Abrupt and kidney-shaped. Mrs. Grant has the best form. 
8. significans, Lowe. Raised by myself. 5 ^ inches. Rugose 
and truncate. „ . . , „ 
9. subcornutum, Tail. 8 X 1 inches. Rigid. Crenate ; apex 
abruptly rounded. Cornute. 
10. supra-cornutum, Lowe. Horned above. 
it. truncatum, Ivery. Not uncommon. A nice form has been 
found at Black Head, Co. Clare, by Mr. P. B. O’ Kelly. 
Sub-section. PERAFERENS. (Bearing a pouch.) 
1. acetabulum, Lowe. Raised by myself. A shallow cup at 
apex, and there supralineate. i2X2f inches (of which 7 is the 
2. anomalum, Lowe (perafero-anomalum, Mapplebeck). Raised 
by Mr. Mapplebeck in 1872. 8x if inches ; stipes 4 inches long. 
Pouch muricate, but frond smooth. 
3. crispissimum, Lowe. Raised by myself. Wavy in a enspum- 
like manner. 
4. excurrens, Moore. Found in 1864, at Whitbarrow, by Mr. G. 
Stabler. Homed on the upper side. 
5. fimbriatum, Lowe (marked 102 in the late Colonel Jones s 
collection). 6xi | inches. The edges of the cup fringed ; cornute. 
Mr. W. H. Phillips found a similar form at Gormanstown. 
6. incurvare, Lowe. Raised by myself. 10 X inches. Costa 
dividing 2 inches from the apex, forming an imperfect pouch at 
the top, which faces the front of the frond. There are two horns 
at the base on the underside bearing sori. 
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