LASTREA DILATATA. 



309 



frond narrow, lengthy, subtriangular-ovate. Pinnse opposite, 

 horizontal, distinct. Pinnules at right angles, the basal ones 

 pinnatifid. Lobes blunt, with acuminate teeth. Scales dark 

 and two-coloured. It is unnecessary to give an illustration. 



.IM^\f 



Fig. 2-54.— Pinna. 



Stricta, Moore. (Fig. 254.) — Found in Somersetshire. This 

 is an unusual-looking oblong-fronded variety, having a narrow 

 lamina, of eight or nine inches in length, to the up right -growing 

 fronds. The pinnae are also all point upwards at an angle of 

 45^ I am indebted to Mr. Elworthy, of Xettlecombe, for 

 fronds. 



Fig. 255.— Portion of Frond. 



Irregularis, Moore. (Fig. 255.) — Found on Witherslack 

 Moss, in 1862, by Mr. J. M. Barnes, of Levens, near ^lilnthorpe. 

 A dwarf Fern, irregvdar in the size of the pinnae and pinnules. 

 Pinnae subopposite below, alternate above. Pinnae irregular in 

 size; pinnules, some large and divided into lobes, others brief, 



2 S 



