In late winter, stumbling across a blooming patch of Trout Lily is an unexpected bonus, like discovering a $20 bill in the pocket of a rarely-worn jacket. Erythronium americanum, Trout Lily, is sometimes called the Yellow Dogtooth Violet or Adder’s Tongue. It would take an active imagination to conjure the delicate yellow flowers with brown or bronze reverse into a fish, canine teeth, or a snake’s tongue.
This lovely ephemeral is native to the eastern US. “Ephemeral” means “fleeting,” which is exactly how this plant behaves. It blooms in early spring before tree leaves emerge, about the same time as Crocus. Soon after flowering, the plant produces seeds and then withers away. The seeds will eventually develop into corms, a type of bulb. They are sold as corms, not seeds. Plant in fall for best results. Most corms prefer shallow planting, but Trout Lily likes a deep hole (five inches) which seems unusual for such a small bulb. The seeds are spread around by ants.
Plants thrive in moist, shady woodlands with acidic soils. It takes a year or two for juvenile plants to start blooming. Juveniles are easy to spot since they only produce a single leaf rather than the paired leaves of mature specimens. Plants reach a mere six inches in height, with the bloom stems slightly taller. Older plants may stop flowering if the bulbs become too congested. In this case, lift and divide just as the plants begin to go dormant.
Trout Lily leaves have a mottled appearance. Flower petals curl back toward the stem, described by botanists as recurving. Blooms are one- to three-inches in diameter. Flowers contain six yellow stamens and reddish-brown anthers. There is a less common white form, E. albidum, whose white flower petals are flushed with lavender on the reverse side. Adder’s Tongue, E. propullans, is a pink-flower form found only in Minnesota. Strangely, it bears a small bulblet halfway up the stem.
Trout Lily looks delicate but it is quite sturdy, making its appearance early in the year when frosts and freezes are still common. The flowers attract bees. The corms, unfortunately, are tasty to small forest critters although deer usually leave them alone. Protect them with a circle fence of buried fine-mesh wire or a gravel moat. Since I have both cats and dogs, I researched their toxicity. One source said that the bulbs were edible, with a cucumber-like taste. Another said that the bulbs were an emetic (makes one vomit). No further testing on my part! I opted for the protection of the wire mesh to prevent my pets from tasting.
The bronze backs of the Trout Lily petals are evident in this photo. Note the mottled leaves.
Trout Lily bloom detail