Botrychium simplex, the little grapefern, is a species of fern in the family Ophioglossaceae that is native to North America and Greenland.

[2] It is listed as a special concern species in Connecticut and is believed extirpated.

[3] It is endangered in Illinois, Indiana, and Ohio.

It is listed as endangered and extirpated in Maryland, threatened in Iowa, exploitably vulnerable in New York, special concern in Rhode Island, and sensitive in Washington (state).

[4] This species is extremely rare in most European countries.