Proliferous and Viviparous Species, 6wc. 
59 
rougli fibrous peat, and coarse silver sand, in equal 
proportions, form a mixture that gives the most satis- 
factory results. In this the cut-up rhizomes should 
be laid with but a very superficial covering of the 
same material, when the young growths will make 
headway in a remarkably short time, especially if 
the whole is subjected to the influence of a warm, 
Fig. 28. Oak Fern (Polypodium Dryopteris), a familiar 
example of a species having creeping rhizomes. 
moist atmosphere, such as that of an ordinary pro- 
pagating-case, or of a melon- or forcing-pit. 
Proliferous and Viviparous Species, <Scc. 
To propagate the Proliferous and Viviparous 
Ferns is a very simple matter. With those species 
and varieties that produce solitary and terminal 
bulbils, the ends of the fronds should be securely 
pegged down to the soil, or else to the moss sur- 
rounding the plants. Soon an independent existence 
is set up. Similarly, when bulbils are produced on 
