42 



STOVE TEENS. 



pinnae about 9 inches long, sessile. Pinnules overlapping and 

 leathery, rather truncate at base; margin slightly crenulate. 



Stipes, rachis, and midrib cover- 

 ed densely with reddish-brown- 

 coloured down and scales. It 

 is very apt to throw off its 

 leaflets if allowed to become dry. 

 It can only be increased by 

 spores. Those who have seen 

 it growing wild say that it grows 

 naturally in a light rich soil. 



DIPLAZniM. 



In this genus, formed by 

 Professor Swartz, the cultivator 

 of Ferns will find several that 

 he has known as Aspleniums. 

 They are separated on account 

 of the spore-masses being placed 

 in pairs, with each back opposite, 

 on a single small vein : hence 

 its characteristic name, from 

 diplazo, to double. 



DIPLAZIUM ACUMINATTJM 

 (Tapering). The spores of this 



very distinct species were sent from Ceylon to a gentleman OE 

 the Continent a few years ago. He was very fortunate in 

 raising them, and the species has now become pretty plentiful. 

 The fronds are quite smooth, almost shining, pinnate, and about 

 18 inches in length. 



D. ALTEENIPOLIUM ( Alternate-leaved) . This species is some- 

 times called also D. integrifolium, because, while young, the 

 fronds are undivided. As they attain maturity they produce 

 two pairs of side pinnae, and one larger terminal one. The 



Fig. 20. Didymochlsena truncatula. 

 (Top of pinna full size.) 



