Filmy Ferns. 
19 
for from eight to ten years or more. In nearly 
e\ery part of the globe these Transparent Ferns are 
found. Britain, it is true, contributes but a very 
Fig. 14. One of the so=called Flowering Ferns — Anemia collina, 
the "flower'* spike appearance being merely due to a 
contraction of the fertile segments. 
insignificant proportion compared with New Zealand, 
Tasmania, and Chili ; still our native Trichomanes 
radicans, Hymen ophyJhcvi tunhridgense (Fig. 13), 
and H. unilateral e are so beautiful that they should 
not be overlooked. For years Filmies were killed 
