90 THE BOOK OF FERN CULTURE 



widely distinct in form and habit, yet it is remarkable 

 that we have none with tinted or variegated fronds. 

 Adtantum capillus-veneris has small fronds of a deep 

 sombre green, which are produced from spreading 

 rhizomes, which will spread and root freely on a 

 brick wall. Frequent instances occur where this Fern 

 has germinated from spores and covers moist walls. It 

 is the only hardy species, but there are several distinct 

 varieties, the most beautiful of which is imbricatum, which 

 has large pinnules, irregularly lobed and undulated. 

 The true form of this does not produce spores, but small 

 bulbils are formed round the margins of the mature 

 fronds, and if these are laid on suitable material in a 

 shady position, young plants may soon be established. 

 A. c.-v. cornubiense and daphnites are other desirable 

 species. Among seedlings of the type, much variation 

 may be found. 



Allosorus crispus (the Parsley Fern) is a distinct little 

 Fern with a tufted caudex ; the finely cut fronds rarely 

 attain to more than from three to five inches in length. 

 There is a crested variety of this, but it is rarely seen. 

 This Fern succeeds best in a good loamy compost. 



Aspleniums. The hardy species are mostly of small 

 dimensions. A. adiantum nigrum, which is extensively 

 grown in France for supplying the markets with cut 

 fronds, is one of the most useful. It is found in various 

 parts and grows best round the stumps of trees on 

 sloping banks. When grown in pots loam and leaf- 

 mould should be used. There are several varieties, 

 including one with crested fronds, and that grown 

 in France makes larger fronds than any I have seen 

 growing in England. 



Athyrium filix-faemma (the Lady Fern). This is now 

 included with the Aspleniums, yet it is so distinct and so 

 well known as above, that for garden purposes the name 

 may be retained. As mentioned above the varieties are 



