LINDMAN, AMERICAN SPECIES OF TRICHOMANES SM. 



45 



a solitary and small involucre, the lips of which are 

 only 0,5 mm long, 0,7 mm broad (in Tr. sphenoides almost as 

 large as in Tr. pusillum Sw., fig. 21, viz. 0,7 mm long, 

 0,9 mm broad, see fig. 23); 



Fig. 26. Trichomancs fontanum Lindm. n. sp., a specimen from South 

 Brazil, Rio Grande do Siil, Exped. 1. Regnell., n, A. 1043; the plant in na- 

 tural size, and various fronds X 10. 



a distinct stipes of which the greater part is naked. 

 As further marks for this little plant it may be added: 

 the midrib is rather thicker than in sphenoides, although 

 the latter is of a larger size; 



