34 Choice Ferns for Amateurs. 
between the two parents is clearly shown. Among 
the most striking instances illustrative of satisfactory 
results in intentional crossing, that mentioned in 
Mr. Druery's book on Choice British Ferns ' 
Fig. 26. Portion of Frond oif Gleichenia circinata semi= 
vestita, a remarkably slow=growing variety. 
(p. 44) as being Mr. Clapham's greatest success, and 
the result of a cross between a beautifully-crested 
Polypody (Polypodiiim vidgare bifldo-cristatum) and 
a very finely-divided one (P. elegantissimum) is 
particularly remarkable and conclusive. In this 
