348 -CHARACTERS OF TRIBES AND GENERA. 



** Vernation fasciculate, decumbent. 



T. crispum, Linn, (v v.) ; T. pinnatum, Hedw. (v v.) ; T. 

 lucens, Sw. ; T. Lambertiana, Hook. ; T. attenuatum, Hook. 

 (v v.) ; T. alatum, Sw. (v v.) ; T. Bancroftii, Hook, (v v.) ; 

 T. crinitum, Sw. (v v.) ; T. superbum, Sack, (v v.) 



*** Vernation fasciculate, erect. 



T. javanicnm, SI. (v v.) ; T. Leprieurii, Kunze. (v v.) ; 

 T. rigidum, Sw. (v v.) ; T. fceniculaceum, Bory (v v.) ; T. 

 meifolium, Bory (v v.) ; T. polyanthos, Hook. Ic. PI., t. 703 ; 

 T. strictum, Menz. ; T. gigantum, Bory T. Smithii, Hook. ; 

 T. elongatum, A. Cunn. (v v.) ; T. saxatile, Moore (v v.) ; 

 T. trichophyllum, Moore (v v.) ; T. setigerum, Back, (v v.) 



OBS. I have above shown that the only technical 

 difference between HymenopJiyllum and Trichomanes is that 

 in the latter the receptacle is prolonged beyond the spo- 

 rangia, even in some to the length of a quarter of an inch, 

 having the appearance of bristles excerted beyond the 

 margin of the frond. 



In this country Hymenopliyllacece is represented by three 

 species, namely, Hymenophyllum Turibridgense, H. unilaterale, 

 and Trichomanes radicans. They are, however, very rare, 

 being found in a few special localities ; the latter is becoming 

 very rare in England, but is found in several localities in the 

 south of Ireland. Since the invention of Wardian cases, 

 these *' Filmy Ferns " so called, have become great favourites 

 with amateur cultivators ; and the great demand for them 

 is bringing about their extermination in this country. 



With regard to Exotic species, in my "Catalogue of 

 Cultivated Ferns " for 1846, only two species are enume- 

 rated, which in 1864 had increased to sixty- three, as 

 recorded in " Ferns, British and Foreign," pages 249 and 

 324. 



