PROPERTIES AND USES, 395 
Ophioglossum vulgatum. 
Adders' Tongue Fern in this country is extensively 
collected by herb gatherers ; being mucilagenous it is used 
in the preparation of salves, but now, with its congener, 
the moonwort, its use has become obsolete. 
Helminthostachys dulcis, 
A native of Ceylon, India, and Malay Islands, and is 
used as a pot herb; the young fronds are eaten as 
asparagus, 
