THE LASTREAS 



155 



Producta Forster. — Fine slender variety. 

 Smithiesii. — A handsome robust, crispy, congested form, 

 resembles pseudo-mas in its tough make and scaly character. 



Lastrea Pseudo-mas 



Abbreviata crist ata (Plate XIX). — Prettily crested ; found in 

 Borrowdale, Cumberland, by Mr. R. D. Harrison ; a comparatively 

 small grower, a foot to eighteen inches. 



Apospora percristata. — Raised by Mr. Cropper, presumably 

 from L. ps. cristata ; a lovely small - growing Fern, with fine fim- 

 briate and crested subdivisions ; any portion layered and kept 

 close produces prothalli in abundance and young plants shortly 

 after ; a unique variety, but unfortunately very delicate in con- 

 stitution ; one of the most interesting varieties of all, since besides 

 its beauty it is both aposporous and apogamous ; see Life History. 



Congesta cristata. — A dwarf gem raised by Dr. Lyell. 



172. L. pscudo-mas crispa. 



Crispa (Fig. 172). — Found in Wales ; dwarf and crispy. 



