58 
New Zealand Ferns 
( 19 ) H. unilaterale (one-sided). Very similar to H. 
timbridgense, but the frond is usually taller, more rigid, 
more sparingly divided, and the leaflets are often one- 
sided. 
Description .—- Root long, creeping. Stalks ^in. to 1^ inches 
long, slender, wiry, naked. Fronds 1 to 4 inches long by ^in. to 
1 inch broad, dark-green, rigidly membranous, margins serrated. 
Seeds near the midrib, as in H. timbridgense. 
From Te Aroha southwards, chiefly in mountain forests, some- 
what scarce. Sea-level to 3,500 feet. 
The geographical range of this species is nearly the 
same as that of H. timbridgense, but it is a rarer plant. 
