50 



ARKIV FÖR BOTANIK. BAND 1. 



Sterile orbicular fronds are nearly 5 mm long and 6 mm 

 broad. Fertile ones reach a length of 6 mm (the involucre 

 included). For these measurements, specimens from French 

 Guiana (Sagot, n. 847, ex parte) are observed, fig. 28. The 

 Brazilian specimens from Rio de Janeiro (Mosén, n. 2719 V'2), 

 which I believe to belong to this species, fig. 29, are not 



Fig. 29. Trichomanes myrioneuron Lindm. u. sp. ( x 10), a specimen from 

 Rio de Janeiro, coll. hy Mosén, n. 2719 ^'2. 



quite so large, fertile fronds being only 4^-5 mm long (the 

 involucre included). These latter also have a more slender 

 stipes and caudex, which are much less hairy or partially 

 naked; they bear perhaps the same relation to the speci- 

 mens from Gruiana, as my South Brazilian Trich. fonfanum 



