Ophioglossaceae

Ophioglossaceae is a family of ferns known commonly as the "adder's-tongue" ferns. These plants are distinguished by their unique frond morphology, which is typically divided into two parts: a sterile vegetative blade and a fertile spore-producing spike. This unusual structure has led to them being sometimes referred to as "ograze" or "fork-ferns." The family is cosmopolitan, found in a wide range of habitats across the globe, though they are often found in damp or shaded environments.

The reproductive strategy of Ophioglossaceae is also noteworthy. They reproduce via spores, and their life cycle involves a subterranean, saprophytic gametophyte that is difficult to find and study. This has made understanding their reproductive biology a challenge for botanists. The family contains several genera, including the well-known Ophioglossum (adder's-tongue) and Botrychium (moonwort). Evolutionary studies suggest that Ophioglossaceae represents an ancient lineage within the ferns. Their distinctive morphology and life history make them a subject of ongoing botanical research.