350 BRITISH FERNS 



XLIV 



Congestum Preston ( Woll.) 

 Mr. R. P. Preston, Yelland, Carnforth. Lancashire. 1S71. 



1 1 in. 

 Syn. Prestonii {Moore) 



Mr. Barnes records the discovery in the north of the following 

 plumose forms of the species : — Prestonii, found in 1871 on the 

 limestone range called Warton Crag, Lancashire, by Mr. Preston, 

 of Yelland ; Barrowii, found in 1874 near Witherslack, West- 

 moreland, by Thomas Barrow, a stonemason, of Lindale; Hadieinii, 

 found in 1875 near Silverdale, Lancashire, by Mr. Hadwin, of 

 Liverpool. Mr. Lowe has a fine plumose form which is said to 

 have been found near Macclesfield, by the gardener of the late Mr. 

 Brocklehurst of that town. There is also Mr. Ivery's Cambricum 

 erection, a very robust deltoid form which is said to be fertile, and 

 whose history appears to be lost. Prestonii is the nearest approach 

 to a congested form. 



Under glass by Mr. Barnes. "This plant was found by Mr. 

 Preston not far from his own farm; it was very small, growing in 

 the crevice of a rock, — and so fast that he could not get it out ; he, 

 however, managed to break off the piece of rock on which it was 

 growing, and with true patience and perseverance got it safely 

 home." — Note by Mr Barnes. 



Perfectly barren, — in fact a close-growing plumose form. 



