78 NOTES ON COLLECTING FERNS.—BY D. H. CAMPBELL. 
Helminthostachys has but a single species. It is usually 
found in rich humus soil in the lower forest. It is a foot 
or so in height. 
Both genera, Ophioglossum and Helminthostachys , are 
reported from Sarawak, but they are evidently rare, and 
the chances of finding their prothallia are small. 
