128 



BRITISH FERNS 



V 



Bifidum. — Found in several places ; tips of frond 

 and pinnae irregularly forked. 



Caudatum (Fig. 118).— Found at Eastwood by Mr. 

 Stansfield ; frond tips reduced and undivided, forming 

 a tail. 



Concinnum. — Found in several places ; a very nar- 

 row form, with toothed, rounded segments which, 

 however, are sometimes irregular in 

 size. In the best form — 



C. Druery, found by the writer 

 on Exmoor, the pinnae are regularly 

 rounded and sharply and evenly 

 toothed, the barren fronds being less 

 than half an inch wide by nine inches 

 long, and like a string of scallop shells ; 

 the fertile are merely beaded stalks. 



Confertum (Fig. 119). — Found by 

 Mr. Clapham in Yorkshire. A dwarf, 

 dense form with crowded pinnae, really 

 an imbricatum. 



^ 



~> 



-T 



b 



w 



■^ Confluens. — A form found by the 

 7 writer in the Gap of Dunloe, on Dart- 

 moor, and near Tintern Abbey, in 

 which the pinnae are joined together 

 towards the frond tip. 



Congestum. — A densely congested 

 form found by Mr. Crouch in Wastdale. 



Contractum. — Found in North 

 Wales by Mr. J. Holmes ; an extreme 

 form of Strictum. 



Fig. 118. 

 B. j. caitdatum. 



Contracto - ramosum. — Found in 

 Scotland by Mr. Horsfall ; a branched 

 form of contractum. 



Crenato - congestum. — Found in 

 Patterdale by Mr. W. Forster ; pinnae 

 densely congested and blunt-toothed. 



B. , 



m 



ig. 119. 



confertum. 



