Northern Adder's Tongue Ophioglossum pusillum

French names: Ophioglosse Family: Adder's Tongue Family (Ophioglossaceae) Distinctive features: Single leaf, single stalk. Very unfernlike. Leaves: Undivided;  Single, undivided. Height: 10-20 cm (4-8 in) Native/Non-native: Native Status: Uncommon. Notes: Easily overlooked. For more information visit: Ontario Ferns Photographs: 7 photographs available, of which 4 are featured on this page. SCROLL DOWN FOR PHOTOGRAPHS.