HYMENOPHYLLACEAE 575 
HYMENOPHYLLACEAE. 
This family includes only the two genera, Aymenophyllum and Tricho- 
manes, but each is represented by a large number of species, distributed 
FIG. 322. 
Habit of Hymenophyllum. A=H. cruentum, Cav. B=H. dilatatum, Sw. C=H. 
australe, Willd. (After Sadebeck, from Engler and Prantl, Mat. Pfanzenfam.) 
chiefly in moist and shaded spots throughout the tropics: they extend 
as stragglers northwards, though more freely to the south, and’ there is 
a special centre of their distribution in New Zealand. 
