LASTREA DILATATA. 293 



Tanacetifolia, Moore. — Found iu Devonshire, Kent, Surrey, 

 Middlesex, Worcestershire, Yorkshire, Lancashire, Nottingham- 

 shire, and Derbyshire. Exceedingly abundant in many places 

 between Clitheroe and Preston, and Clitheroe and Lancaster. 

 A common form. Fronds tripinnate, broadly triangular 

 and large, often very large and lax, making a conspicuous 

 interesting fernery plant. The stipes abundantly scaly, the 

 scales entire, lanceolate, dark brown, with a darker belt down 

 their centre. 



^M ^.fs 



'\ 



Fig. 235. — Pinnte of Lepidota. 



Lepidota, Moore. (Plate XXXIII.) — Said to be found in 

 Yorkshire, but its history obscure. ^Ir. Tait, of Edinburgh, 

 brought it under notice, having procured it from Mr. Stark, 

 a Nurseryman of that city. Singularly distinct, dwarf, and 

 having much-divided fronds. Fronds quadripinnate, very 

 broadly ovate; length about eighteen inches. Pinnae everywhere 

 very unequal, the posterior ones much the largest. Pinnules 

 small and distinct, the primary pinnules elongate-ovate and 

 distant on the rachides, and pinnate. The secondary pinnules 

 also distant, blunt, brief ovate, having a tapering stalk-like 

 base; below they are divided into broad lobes, being tertiary 

 pinnules on the basal posterior pinnule of the basal pinna. 

 The ultimate divisions are small. Densely scaly, with large, 

 entire, lepidote, brown scales. Mr. Moore remarks a striking 

 peculiarity in the development of the fronds, the evolution of 

 the fronds being indefinite, for the basal pinnules of a pinna 

 have matured and scattered their sori before the apex of the 

 same pinna has expanded itself or become unrolled. I am 

 indebted to Mr. Cooling, of Derby, for plants. 



■i Q 



