# horsetails (*Equisetum*)

Horsetails are unique plants that look like green, spiky tubes. They grow in wet areas and have been around for millions of years, making them one of the oldest plants on Earth!

- **Category:** [Plants](https://www.snappit.app/explore/categories/plant)
- **Rarity:** Common
- **Danger:** 1/5 · Very low
- **Habitat:** Wetlands
- **Also known as:** Equisetum, Horsetail, Scouring Rush

![horsetails](https://res.cloudinary.com/drieglelr/image/upload/v1771424510/objects/4084.jpg)

## Appearance

The horsetails has unique jointed, hollow stems that are typically green or brownish. Instead of leaves, it has small, scale-like structures in whorls at each joint. Some species have feathery branches or a cone-like spore structure at the tip, making them look very distinct from flowering plants.

## Taxonomy

- **Kingdom:** Plantae
- **Phylum:** Tracheophyta
- **Class:** Polypodiopsida
- **Order:** Equisetales
- **Family:** Equisetaceae
- **Genus:** Equisetum

## Interesting facts

- "Living fossils," horsetails grew tall as trees when dinosaurs roamed the Earth!
- People once used dried horsetail stems to scrub pots and pans like a natural sponge!
- Some horsetail species can grow over 8 feet tall, making them giants among plants!
- Their stems feel like sandpaper because they contain tiny glass-like crystals called silica!

## Special abilities

- **Silica Shield:** Horsetails have tiny silica crystals in their stems, making them rough to touch. This helps them stand tall and deters many plant-eating animals.
- **Deep Drinker:** Horsetails can grow roots (rhizomes) several meters deep, allowing them to find water far underground that other plants can't reach.
- **Ancient Roots:** Horsetails have survived for over 300 million years, thanks to tough rhizomes that help them regrow even after harsh environmental changes.

## Measurements & details

- **Height:** 10-250 cm
- **Spread:** 30-100 cm
- **Edible:** No
- **Toxicity:** Mild
- **Lifecycle:** Perennial

## Ecological connections

- **Eaten by:** [horse](https://www.snappit.app/explore/horse) (*Equus caballus*) — can cause illness if grazed extensively
- **Eaten by:** horsetail midge (*Cricotopus tibialis*) — larvae mine the stems for food
- **Shelter:** mallard duck (*Anas platyrhynchos*) — dense stands provide cover along water

## Traits

- [Grass-Like](https://www.snappit.app/explore/traits/grass-like): Grass-like plants are herbaceous plants that visually resemble true grasses, typically having long, narrow leaves.
- [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.
- [Spore Producing](https://www.snappit.app/explore/traits/spore-producing): Spore-producing organisms reproduce by releasing small, often single-celled, reproductive units called spores.
- [Fiber](https://www.snappit.app/explore/traits/fiber): This human use trait identifies species that yield natural fibers, used by humans for textiles, rope, paper, and other manufactured goods.
- [Ancient Lineage](https://www.snappit.app/explore/traits/ancient-lineage): This trait signifies organisms belonging to a very old evolutionary group with ancestors dating back millions of years.
- [Longevous](https://www.snappit.app/explore/traits/longevous): This trait characterizes organisms with an exceptionally long lifespan compared to others of their kind.
- [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.

## Collections

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

## Safety

**Danger:** 1/5 · Very low

Always explore plants with an adult, and don't touch any you don't know.

## Frequently Asked Questions

### How to identify horsetails?

Compare frond shape, how the leaflets are arranged, the stalk, and any spore clusters you can see. A single detached leaflet often hides the plant's overall growth pattern. Fern Identifier: upload a photo and compare the visible details.

### How tall is horsetails?

10-250 cm

### How wide does horsetails spread?

30-100 cm

### Is horsetails edible?

No

### Is horsetails toxic?

Mild

### What is horsetails's lifecycle?

Perennial

### Where is horsetails usually found?

Wetlands

## Watch

- [Play video: horsetails](https://www.snappit.app/videos/horsetails)
- [YouTube](https://youtube.com/watch?v=hQoEIAnKrMQ)

## 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: [Horsetails: Characteristics, Facts & Places to See — Snappit](https://www.snappit.app/explore/horsetails)