xx] 



LOXSOMACEAE 



293 



the close agreement as regards the sori of the two species there 

 would seem to be no justification for this change of name'. 



Loxsomaceae. 



The New Zealand genus Loxsoma has marginal sori with a 

 cup-like indusium surrounding an elongated receptacle bearing 



Pig. 228. Matonia pectinata. From a photograph by Mr Tansley of a group 

 of plants in a wood on Guuong Tundok, Mount Ophir. 



pear-shaped sporangia provided with a complete oblique annulus. 

 The genus is chiefly interesting because of its isolated position ; it 

 agrees with Trichomanes (Hymenophyllaceae) in the structure of 

 the sorus and with species of Dicksonia and Davallia in habit; it 

 shows some resemblance also to Gleicheniaceae and Schizaea- 

 ceae^. A new type of fern described by Christ^ from Costa Rica 

 as Loxsomopsis costaricensis affords a striking instance of dis- 

 continuous distribution and emphasises the antiquity and 

 generalised features of the family. 



1 Copeland (08) p. 344. ^ Bower (00) p. 47 ; Gwynne-Vaughan (01). 



3 Christ (04). 



