THE LASTREAS 
LASTREA SPINULOSA (THE SPINY BUCKLER FERN) 
(Plate XXII) 
For a description of this Fern, which we regard as a sub-variety 
or sub-species of the L. dilatata section, we cannot do better than 
Fig. 181. Z. spinulosa (part of pinna). 
refer to Fig. 181 and Plate XXII. There are no marked varieties 
which can be imputed to it. 
LASTREA RIGIDA (THE Кісір BUCKLER FERN) 
(Plate XXT) 
This Lastrea is entirely confined to Limestone districts of some 
elevation. It roughly resembles a somewhat small, stiff-growing 
Male Fern, and like that Fern the fronds (Fig. 182) arise in circlets 
Fig. 182. Z. rigida (pinna). 
from an erect rootstock, but as its fronds have a somewhat mealy 
appearance, owing to numerous glands on their surface, it is easily 
distinguished. In cultivation, the usual compost may be used, 
but with an admixture of limestone. It is deciduous. The only 
constant variety, cristata, was found by Mr. Е. A. Barraud, we 
believe near Ingleborough, Yorks; a thoroughbred, prettily crested 
at all tips, but, unfortunately, it is not now in existence, and is 
only mentioned to stimulate further search. 

