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Photo of a Bracken Fern Frond

Bracken Fern
(Pterifium aquilinum)

Fern growning in a streamThe bracken fern is one of the most widespread and recognizable plants in the Upper Peninsula. They often grow in large colonies and take over the undergrowth in forests. When these die off in the fall they provide flammable fuel if a fire moves through. Fossils show that ferns have been around as long as 55 million years. Bracken ferns can grow in a variety of soils, but it does not do well in waterlogged areas. It can often survive is drier areas than most other kinds of ferns, but it does not like shade.


Bracken Fern frond
The bracken fern can be between four and seven feet tall. It is one of the earliest ferns to appear in spring and one of the first plants to begin growing after a fire. Ferns are actually well adapted to take advantage of fires because its rhizomes Fern Fiddlehead(an underground part of a stem) are buried deep underground and can sprout quickly after the head passes, beating out competing species.The dark green leaves of the bracken fern, called fronds, are feathery and lacy. They usually have a triangular shape with tiny, rounded leaflets. The foliage is poisonous to livestock, pets and people.

Fern unfurlingOne way bracken ferns reproduce is through shedding small, lightweight spores that are easily transported by wind. This is especially successful when the spores land in areas that have been recently burned or disturbed where sun is abundant and competition from other species is limited.

More often, new ferns grow as a result of spreading rhizomes or "runners". Curved leaves, called fiddleheads, emerge from the ground early in spring and unroll into the long triangular leaves.