# Bank Haircap Moss (*Polytrichum formosum*)

Bank Haircap Moss is a soft, green plant that grows in clumps. It loves to live in damp places like forests and along riverbanks, making it a cozy home for tiny creatures.

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

![Bank Haircap Moss](https://commons.wikimedia.org/w/index.php?title=Special:Redirect/file/Polytrichum_Formosum2.jpg&width=800)

Photo: Alexander Klink, CC BY 3.0 · [Wikimedia Commons](https://commons.wikimedia.org/wiki/File:Polytrichum_Formosum2.jpg)

## Appearance

The Bank Haircap Moss is a tall, vibrant green moss, forming dense, upright tufts or mats. Its individual stems resemble miniature conifers, topped with reddish-brown spore capsules that appear on slender stalks, often covered by a distinctive hairy cap.

## Taxonomy

- **Kingdom:** Plantae
- **Phylum:** Bryophyta
- **Class:** Polytrichopsida
- **Order:** Polytrichales
- **Family:** Polytrichaceae
- **Genus:** Polytrichum

## Interesting facts

- Bank Haircap Moss gets its name from the tiny, hairy cap that covers its spore capsules, like a little wig!
- If you look very closely, you might see tiny 'umbrellas' on stalks; these are the parts that make its spores!
- It has tiny 'teeth' on its leaves called lamellae that help it soak up and hold onto moisture like a sponge!
- This moss can act like a mini-forest, with its upright stems creating shade and shelter for tiny creatures below!

## Special abilities

- **Water Tower:** Bank Haircap Moss can soak up and hold large amounts of water, helping it survive dry periods and keep its surroundings moist.
- **Spore Shooter:** This moss sends its spores high into the air on tall stalks, helping them spread far and wide to new locations.
- **Acid Survivor:** Bank Haircap Moss can thrive in acidic soils where many other plants struggle, giving it an advantage in certain habitats.

## Measurements & details

- **Height:** 5-15 cm
- **Spread:** 5-30 cm
- **Edible:** No
- **Toxicity:** None
- **Lifecycle:** Perennial

## Ecological connections

- **Shelter:** Common ground beetle (*Pterostichus melanarius*) — Hides under moss mats from predators.
- **Eats:** Moss mite (*Oribatula venusta*) — Grazes on tiny moss cells and associated fungi.
- **Symbiotic with:** [Reindeer lichen](https://www.snappit.app/explore/reindeer-lichen) (*Cladonia rangiferina*) — Often found growing alongside this moss in similar habitats.

## Traits

- [Furry](https://www.snappit.app/explore/traits/furry): Furry describes animals possessing a dense covering of soft hair or fur.
- [Nonvascular](https://www.snappit.app/explore/traits/nonvascular): This trait characterizes plants lacking specialized vascular tissues (xylem and phloem) for transporting water and nutrients.
- [Cold Hardy](https://www.snappit.app/explore/traits/cold-hardy): Cold hardy plants are able to withstand low temperatures and freezing conditions without significant damage.
- [Decomposer](https://www.snappit.app/explore/traits/decomposer): Describes organisms that break down dead organic material, recycling nutrients back into the ecosystem.
- [Forest](https://www.snappit.app/explore/traits/forest): Forest habitats are terrestrial environments dominated by dense tree cover, supporting a high diversity of plant and animal life.

## Collections

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

## Safety

**Danger:** 1/5 · Very low

It's safe to touch, but be gentle and don't pull it out of the ground.

## Frequently Asked Questions

### How to identify Bank Haircap Moss?

Compare growth form, branching, tiny leaves and any spore capsules. Mosses, liverworts and lichens can share a spot but are very different organisms. Moss Identifier: upload a photo and compare the visible details.

### How tall is Bank Haircap Moss?

5-15 cm

### How wide does Bank Haircap Moss spread?

5-30 cm

### Is Bank Haircap Moss edible?

No

### Is Bank Haircap Moss toxic?

None

### What is Bank Haircap Moss's lifecycle?

Perennial

### Where is Bank Haircap Moss usually found?

Forests

## 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: [Bank Haircap Moss: Facts & Places to See — Snappit](https://www.snappit.app/explore/bank-haircap-moss)