Trout Lilies, also called Dog-Tooth Violets or Adder's Tongues are a spring flowering woodland native. These ephemerals flower from early April through May in rich woods before the tree canopy leaves open.
Trout Lilies have light green leaves with gray mottling.
Its flowers have 6 white petals and bright yellow anthers that hang downwards. Emerging bees will nectar on these flowers.
The yellow flowers are 6 petaled as well with red anthers. These flowers are about the same size as the White Trout Lily, around 3/4 inch in diameter.
This Trout Lily is much smaller in size than the other two and can have anywhere from 4-6 petals. The one pictured here has four petals. The flowers are much smaller too, less than 1/2 an inch in diameter and are a whitish-pink in color. Note the size of the fly on the leaf above the flower.
Other differences include: "Fruits of E. propullans are also smaller and, when mature, are nodding rather than erect.
Offshoots of E. propullans arise not from the bulb as in E. albidum but from the stem above the bud, and only from flowering plants." (Minnesota DNR)
If you want to see the White and Dwarf Trout Lily, visit Nerstrand Woods State Park in late April.