# Sumpweed (*Iva annua*)

Sumpweed is a tall plant that grows in wet areas. It has green leaves and small flowers that attract many insects. It's a great plant for helping the environment!

- **Category:** [Plants](https://www.snappit.app/explore/categories/plant)
- **Rarity:** Common
- **Danger:** 1/5 · Very low
- **Snaps:** 2
- **Habitat:** Wetlands

![Sumpweed](https://commons.wikimedia.org/w/index.php?title=Special:Redirect/file/Iva_annua_%28USDA%29.jpg&width=800)

Photo: Public domain · [Wikimedia Commons](https://commons.wikimedia.org/wiki/File:Iva_annua_%28USDA%29.jpg)

## Appearance

The Sumpweed is a tall, often bushy annual plant with sturdy, reddish-brown stems and lance-shaped, coarsely toothed leaves. Its tiny, greenish-yellow flowers are clustered inconspicuously, appearing along the upper stems rather than as showy blooms.

## Taxonomy

- **Kingdom:** Plantae
- **Phylum:** Tracheophyta
- **Class:** Magnoliopsida
- **Order:** Asterales
- **Family:** Asteraceae
- **Genus:** Iva

## Interesting facts

- Ancient people cultivated Sumpweed, harvesting its protein-rich seeds as a vital food source!
- Archaeologists find Sumpweed seeds in 4,000-year-old sites, revealing its prehistoric importance!
- Before corn arrived, Sumpweed was a staple food, feeding early North American communities!
- Despite its name, this "weed" was once a treasured crop for its nutritious seeds!

## Special abilities

- **Wetland Wanderer:** Sumpweed has roots that thrive in soggy, nutrient-rich soils, helping it colonize floodplains and outcompete other plants.
- **Seed Spreader:** Sumpweed produces abundant, small, oily seeds, ensuring its species can rapidly regenerate and spread in disturbed areas.
- **Wind Weaver:** Sumpweed relies on wind to carry its pollen, allowing it to reproduce efficiently without needing specific insect visitors.

## Measurements & details

- **Height:** 100-300 cm
- **Spread:** 30-60 cm
- **Bloom Season:** Late summer to fall
- **Edible:** Yes
- **Toxicity:** None
- **Lifecycle:** Annual
- **Pollination Method:** Wind

## Ecological connections

- **Eaten by:** [White-crowned Sparrow](https://www.snappit.app/explore/white-crowned-sparrow) (*Zonotrichia leucophrys*) — Feasts on abundant Sumpweed seeds in autumn.
- **Eaten by:** [White-footed Mouse](https://www.snappit.app/explore/white-footed-mouse) (*Peromyscus leucopus*) — Gathers Sumpweed seeds for winter caches.
- **Eaten by:** [Human](https://www.snappit.app/explore/human) (*Homo sapiens*) — Prehistoric people harvested its nutritious seeds.

## Traits

- [Deciduous](https://www.snappit.app/explore/traits/deciduous): Deciduous plants periodically shed all their leaves, typically during autumn or dry seasons.
- [Ornamental](https://www.snappit.app/explore/traits/ornamental): Ornamental plants are cultivated primarily for their aesthetic appeal, enhancing landscapes and gardens with their attractive foliage, flowers, or form.
- [Medicinal](https://www.snappit.app/explore/traits/medicinal): Medicinal plants possess chemical compounds that can be used for therapeutic purposes to treat illnesses or maintain health.
- [Pollinator Magnet](https://www.snappit.app/explore/traits/pollinator-magnet): Describes plants that are particularly attractive and beneficial to a wide range of pollinating organisms.
- [Rapid Growing](https://www.snappit.app/explore/traits/rapid-growing): Rapid growing plants exhibit accelerated growth rates, quickly increasing in size and biomass within a short period.
- [Wetland](https://www.snappit.app/explore/traits/wetland): This habitat trait identifies species found in wetlands, which are areas of land saturated with water, either permanently or seasonally, including marshes, swamps, and bogs.
- [Keystone Species](https://www.snappit.app/explore/traits/keystone-species): Describes a species whose presence and role have a disproportionately large effect on its environment.

## Collections

- [Plants](https://www.snappit.app/explore/collections/plants)

## Safety

**Danger:** 1/5 · Very low

Always look but don't touch plants unless a grown-up says it's okay.

## Frequently Asked Questions

### How to identify Sumpweed?

Start with the whole plant, then compare leaf arrangement, leaf edges, stems and any flowers or fruit. Opposite leaves grow in pairs; alternate leaves come one at a time along the stem. These details tell you far more together than a single green leaf does. Plant Identifier: upload a photo and compare the visible details.

### How tall is Sumpweed?

100-300 cm

### How wide does Sumpweed spread?

30-60 cm

### When does Sumpweed bloom?

Late summer to fall

### Is Sumpweed edible?

Yes

### Is Sumpweed toxic?

None

### What is Sumpweed's lifecycle?

Annual

### How is Sumpweed pollinated?

Wind

## Where to spot

- [Illinois Caverns State Natural Area](https://www.snappit.app/guides/places/illinois-caverns-state-natural-area) — Illinois, US · State Park
- [Luverne Historic District](https://www.snappit.app/guides/places/luverne-historic-district) — Alabama, US · Historic District

## More Plants

- [white snakeroot](https://www.snappit.app/explore/white-snakeroot) (*Ageratina altissima*)
- [tree-of-heaven](https://www.snappit.app/explore/tree-of-heaven) (*Ailanthus altissima*)
- [western sword fern](https://www.snappit.app/explore/western-sword-fern) (*Polystichum munitum*)
- [common milkweed](https://www.snappit.app/explore/common-milkweed) (*Asclepias syriaca*)

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Source: [Sumpweed: Characteristics, Facts & Places to See — Snappit](https://www.snappit.app/explore/sumpweed)