From Calscape:
Brackens (Pteridium) are a genus comprising several species of large, coarse ferns. … Brackens are in the family Dennstaedtiaceae, which are noted for their large, highly divided leaves. They are commonly found on moorland. Brackens are cosmopolitan, being found on all continents except Antarctica and in all environments except deserts. The genus probably has the widest distribution of any fern genus in the world. In the past, the genus was commonly treated as having only one species, Pteridium aquilinum, but the recent trend is to subdivide it into about ten species.
- Subspecies or variety
- Pteridium aquilinum var. pubescens