GYMNOGRAMHA. 



63 



covered with clear sulphur- coloured powder. Like most of the 

 others, it is easily raised from spores. 



G. TARTAREA (Infernal). So named, we suppose, because 

 the stems are black as ink. As a contrast to the deep black- 

 ness of the stalks, the under side of the fronds is densely 

 covered with a white powder : hence it has been called the 

 Silver Fern. The fronds are broader at the base than the 

 former species, often tripinnate; and the leaflets, or pinnse, 

 are oval, the lowest one divided into lobes. The grand 

 distinguishing mark, however, is the white powder. Its cul- 

 ture is the same as for the preceding. 



Gr. TO^IENTOSA (Hairy), Fig. 29. Native of Brazil and 

 West Indies. It is very beautiful 

 and tender. Fronds bipinnate, 

 hairy, varying from 1 to 2 feet in 

 height. Sori medial, obliquely 

 forked. Stalk black. 



G. TRIFOLIATA (Three-leaved). 

 This curious species has recently 

 been imported from the West 

 Indies. It is perfectly distinct in 

 its appearance from any other Fern 

 in cultivation. The fronds, which, 

 it must be recollected, are rather 

 brittle, grow quite- upright; and, 

 when full grown, they will probably 

 attain a height of 4 feet. They 

 produce clusters of pinnse in threes 

 all the way up the stem ; they are 

 shaped like long and narrow wil- 



low leaves - The 7 are slightly 

 dusted with yellow powder. There 

 seem to be two varieties of this Fern imported, one with 

 stems smooth, the other covered with brown scales. 



There are many other species of Gymnogramma to be found 





