skunk cabbage

Scientific name: Symplocarpus foetidus. Verified common names: skunk cabbage, eastern skunk cabbage, swamp cabbage. Family: Araceae (aroids). Genus: Symplocarpus. Aroid family membership places it among other spadix-and-spathe flowering plants, a well-established taxonomic relationship.

A herbaceous perennial that typically emerges from a stout, fleshy rhizome. Plants often appear as a single early-season inflorescence followed by a rosette of large leaves. Flowering structures are a spadix enclosed by a hood-like spathe; the spathe is often mottled green to purplish-brown and may be slightly hooded or tubular, concealing many small flowers on the spadix. Flowers themselves are small and inconspicuous, clustered on the spadix rather than showing distinct petals.

Leaves are broad, bright to deep green, and typically appear after flowering. Leaves are simple, with prominent parallel-to-reticulate veins and a somewhat crinkled or pleated surface; they arise from the base in a clustered arrangement. Distinctive identifying features include the early-season, pungent odor when flowers or leaves are bruised (hence the common name), the hooded, mottled spathe, and the notably large basal leaves that follow flowering. Seasonal variation: the inflorescence generally appears in late winter to early spring (often while ground is still cold or snow remains) and is followed by the emergence and expansion of the leaves through spring and summer; foliage typically dies back in autumn.

Typically found in wetlands and other saturated or seasonally inundated sites: swamps, marshes, wet woodlands, streambanks, seeps, and springy ground. Soil preference is generally organic, mucky, or clay-rich substrates that remain wet; plants occur in conditions ranging from full sun to partial shade but commonly occupy openings in wet areas. Geographic distribution covers much of eastern North America; occurrences include CT, DE, IA, IL, IN and many other states across the northeastern, mid-Atlantic, southeastern, and midwestern United States.

Flowers are known to attract flies, carrion-associated insects, and other early-season pollinators; the plant’s odor and warmth function as attractants. Thermogenic activity in the flowering structure can raise temperatures within the spathe, aiding volatilization of scent and facilitating insect activity in cool conditions. Leaves provide seasonal cover and forage structure in wetland plant communities.

Generally common in suitable wetland habitats across its range and not widely considered at risk. Notable adaptations include thermogenesis in the inflorescence (able to generate heat) and early spring emergence that allows exploitation of early pollinators and the ability to push through snow.