Ferns and Fern Culture. 21 
thin and membranaceous, semi-transparent, and delicate. 
In some species they are undivided, as those of the 
Asplenium (Neottopteris) Australasicum, which attain a 
height of 5ft. or 6ft. and 1ft. in width; while others, as 
those of Todea superba and Adiantum gracillimum, are 
divided into minute segments, or leaflets, of exquisite 
beauty. 
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ADIANTUM GRACILLIMUM. 
(Showing minute subdivision of fronds.) 
Fern fronds are also of the most varied shades of 
colour. They range from the palest to the deepest green. 
Some are beautifully variegated with white, yellowish 
green, or red. Several have three colours in their fronds, 
Pteris tricolor being an example, having deep red mid- 
