ACROSTICHUM. 187 



to the upper leaflets, which are only a little smaller than the barren ones, 

 and densely sporangiferous (bearing spore-cases) on their under-side. See 

 Fig. 22. — Hooker, Species Filicum, v., p. 226. Beddome, Ferns of Southern 



Fig. 22, Acrostichum aureum 



(tV nat. size). 



India, t. 204. Eaton, Ferns of North America, t. 58. Lowe, Ferns British 

 and Exotic, vii., t. 62. Nicholson, Dictionary of Gardening, L, p. 18. 



To obtain its full development, this handsome evergreen species requires 

 the temperature of the warm-house, where it should be treated as an aquatic. 



