Symplocarpus foetidus

Photo Credit: Paul Drobot @ University of Wisconsin- Stevens Point
Symplocarpus foetidus
Common Name: skunk cabbage
Plant Functional Group: Forb
Class > Order > Family: Magnoliopsida > Alismatales > Araceae
Where is the species found?
States & Provinces
CT, DC, DE, IA, IL, IN, MA, MD, ME, MI, MN, NC, NH, NJ, NY, OH, PA, RI, TN, VA, VT, WI, WV
Which phenophases should I observe?
Do you see...?
Leaves Initial growth
New growth of the plant is visible after a period of no growth (winter or drought), either from above-ground buds with green tips, or new green or white shoots breaking through the soil surface. Growth is considered "initial" on each bud or shoot until the first leaf has fully unfolded. For seedlings, "initial" growth includes the presence of the one or two small, round or elongated leaves (cotyledons) before the first true leaf has unfolded. For Symplocarpus foetidus, this phenophase typically begins when the mottled purple hood (spathe) starts to swell or expand in late winter or spring as the flowers develop inside, and continues until the first leaf has unfolded, sometimes several weeks later.
More...


Leaves
One or more live, fully unfolded leaves are visible on the plant. For seedlings, consider only true leaves and do not count the one or two small, round or elongated leaves (cotyledons) that are found on the stem almost immediately after the seedling germinates. Do not include fully dried or dead leaves.
More...


Flowers Flowers or flower buds
One or more fresh open or unopened flowers or flower buds are visible on the plant. Include flower buds or inflorescences that are swelling or expanding, but do not include those that are tightly closed and not actively growing (dormant). Also do not include wilted or dried flowers. For Symplocarpus foetidus, watch for the presence of the mottled purple hood (spathe), which contains and hides the flowers. Please do not tear open the hood to look for the individual flowers.
More...

How many flowers and flower buds are present? For species in which individual flowers are clustered in flower heads, spikes or catkins (inflorescences), simply estimate the number of flower heads, spikes or catkins and not the number of individual flowers.

  • Less than 3
  • 3 to 10
  • 11 to 100
  • 101 to 1,000
  • More than 1,000
Fruits Fruits
One or more fruits are visible on the plant. For Symplocarpus foetidus, the fruit is a fleshy berry, crowded with many other berries in an egg-shaped cluster, that changes from white to rosy-purple to red-brown to brown-black.
More...

How many fruits are present?

  • Less than 3
  • 3 to 10
  • 11 to 100
  • 101 to 1,000
  • More than 1,000
Ripe fruits
One or more ripe fruits are visible on the plant. For Symplocarpus foetidus, a fruit is considered ripe when it has turned brown-black.
More...

What percentage of all fruits (unripe plus ripe) on the plant are ripe?

  • Less than 5%
  • 5-24%
  • 25-49%
  • 50-74%
  • 75-94%
  • 95% or more
Recent fruit or seed drop
One or more mature fruits or seeds have dropped or been removed from the plant since your last visit. Do not include obviously immature fruits that have dropped before ripening, such as in a heavy rain or wind, or empty fruits that had long ago dropped all of their seeds but remained on the plant.
More...

How many mature fruits have dropped seeds or have completely dropped or been removed from the plant since your last visit?

  • Less than 3
  • 3 to 10
  • 11 to 100
  • 101 to 1,000
  • More than 1,000
What do these phenophases look like?

There is currently no photoguide available for this species. If you'd like help us create one, use the guidance document and species template provided here. Then send it via email to education@usanpn.org when it is complete.

USDA PLANTS profile for skunk cabbage (USDA Symbol: SYFO )