Jack-in-the-pulpit
Arisaema triphyllum, family Araceae
A woodland plant with a hooded flower spike found in eastern North America
Jack-in-the-pulpit is a perennial herb that grows in the shaded forests of eastern North America. Its unusual flower has a hooded bract that hides a spike of tiny blooms, and its bright red berries appear in late summer. All parts of the plant are toxic unless properly prepared, but it was traditionally used by Native Americans for food and medicine.
- Grows in shaded forests from Canada to Florida
- Produces bright red berries in late summer
- Flowers are hidden inside a hooded bract
- All parts are toxic unless cooked
- Plant can change sex as it matures
What does Jack-in-the-pulpit look like?
Jack-in-the-pulpit is a perennial plant that grows from a corm and usually reaches up to two feet tall, though it can be taller in the southern parts of its range. It has one or two leaves, each divided into three leaflets. Its flower is not showy: tiny blooms cluster on a spike called a spadix, which is mostly hidden by a hooded, sometimes striped bract called a spathe. In late summer, the plant produces clusters of bright red berries. All parts of the plant contain crystals that can cause a burning sensation if eaten raw.
Where does Jack-in-the-pulpit come from?
Jack-in-the-pulpit is native to the shaded, moist forests of eastern North America, from Nova Scotia and Manitoba in Canada down to Florida and Texas in the United States. It was first described by Carl Linnaeus in 1753 and later placed in the genus Arisaema. The species is part of a complex of closely related plants found in the region. Its name comes from the three-parted leaves and the distinctive flower structure.
When and how Jack-in-the-pulpit blooms
The plant flowers from April to June, with the exact timing depending on the region. It grows in shaded, moist woodlands, often in rich soil. Each plant develops from a corm and takes several years to mature and flower. The flowers are pollinated mainly by fungus gnats, which are attracted by the scent and become trapped inside the flower structure.
How Jack-in-the-pulpit is used
Native Americans used the cooked root as a food source, despite its toxicity when raw. They also prepared the root for traditional medicine, using it for sore eyes, rheumatism, bronchitis, and snakebites. Some groups reportedly used the plant in hunting or as a test for the fate of the sick. The plant is not commonly used in modern gardens due to its toxicity.
Kinds of Jack-in-the-pulpit
Jack-in-the-pulpit is part of a species complex that includes Arisaema pusillum, Arisaema stewardsonii, Arisaema quinatum, and sometimes Arisaema acuminatum. These species differ in leaf and flower details and are sometimes hard to tell apart. The plant can also change sex as it grows, starting as male and becoming female with age and size.
What Jack-in-the-pulpit means
The plant is known for its unusual flower and sex-changing life cycle, which has led to nicknames like Jill-in-the-pulpit. It is globally secure in its range, though rare in some areas like Manitoba. Its toxic nature is well known, and it is related to other arum family plants that can cause mouth and throat irritation if eaten raw.
Questions people ask about Jack-in-the-pulpit
Where does Jack-in-the-pulpit come from?
Jack-in-the-pulpit is native to eastern North America, growing wild in forests from Nova Scotia and Manitoba in Canada down to Florida and Texas in the United States.
What does the flower look like?
The flower is a spike of tiny blooms hidden inside a hooded, sometimes striped bract called a spathe. In late summer, the plant produces clusters of bright red berries.
Is Jack-in-the-pulpit poisonous?
Yes, all parts of the plant contain calcium oxalate crystals that cause a burning sensation and irritation if eaten raw. Cooking or drying is needed to make it safe to eat.
How was Jack-in-the-pulpit used by Native Americans?
Native Americans cooked the root to eat as a vegetable and also used preparations of the plant in traditional medicine for sore eyes, rheumatism, bronchitis, and snakebites.
Does the plant have any special features?
Jack-in-the-pulpit can change sex as it grows, starting as male and becoming female as the plant matures and grows larger.
Good reading and sources
- Encyclopaedia BritannicaArticle
- Lady Bird Johnson Wildflower CenterLady Bird Johnson Wildflower Center, Article
- Plants of the World OnlineRoyal Botanic Gardens, Kew, Plant database
- Where it has been recordedGBIF, Plant database
- Sightings and photos by naturalistsiNaturalist, Plant database
- Arisaema triphyllum on WikipediaEncyclopedia
- More photos on Wikimedia CommonsPhotos
- Wikidata recordOpen data
The facts on this page come from the Wikipedia article "Arisaema triphyllum", written by its contributors and used under the CC BY-SA 4.0 licence, and from its Wikidata record (CC0). Phool rewrote the text in its own words, with AI assistance, and compares every page with the article to make sure no passage is copied. It may be reused under the same CC BY-SA 4.0 licence with a link back.
It may contain mistakes. It is not medical or foraging advice: many flowers are poisonous, and traditional uses are reported, not recommended. If something is wrong, tell us. Last refreshed 2026-10-03.
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