Lakeside Daisy State Nature Preserve encompasses 19 acres of old limestone quarried land on the Marblehead Peninsula of Lake Erie in Ottawa County.

This preserve was established to protect the only natural United States population of the Lakeside Daisy, a federally threatened plant species which only occurs at a handful of sites. Also a state endangered species, this is one of Ohio's most spectacular wildflowers.

In early to mid-May, its bright yellow flowers adorn the otherwise bleak, sun-baked landscape of the Marblehead quarry.

The Lakeside Daisy (Hymenoxys herbacea) is the rarest of the plants currently listed as endangered in Ohio. This distinction is due to its limited distribution both in Ohio and throughout its geographic range.