LASTREA DILATATA. 



291 



Glen, near Ardrie, Lanarkshire, by Mr. Tait; it is named by- 

 Mr. Moore as a sub-variety (erecta), having long stipites and 

 ovate triangular fronds, very erect in habit, pinnae distinctly 

 concave, pinnules as distinctly convex, having a crispy appear- 

 ance. Lensrth of frond above two feet. 



Fig. 233.— Frond. 



Interrupta, Moare. (Fig. 233.) — Found near Harrogate, 

 Yorkshire, by Mr. Clapham, of Scarborough. The fronds are 

 lanceolate-ovate in form, of medium size, and of irregular 

 development; occasionally ramose as well as interrupted; the 

 pinnae are sometimes wanting, or reduced to less than half their 

 usual length, the pinnules being irregularly incised or laciniated 

 on the margin, occasionally more or less normal. Subsequently 

 found by Mr. C. Monkman in the Hole of Hercum, Yorkshire, 



