# California Agaricus (*agaricus californicus*)

The California Agaricus is a delightful mushroom that often pops up in gardens and forests. Kids can spot its white cap and learn how it helps nature by breaking down old plant material!

- **Category:** [Fungi](https://www.snappit.app/explore/categories/fungi)
- **Rarity:** Common
- **Danger:** 1/5 · Very low
- **Habitat:** California Agaricus thrives in forests, gardens, and grassy areas.
- **Also known as:** California Mushroom, Garden Agaricus

![California Agaricus](https://commons.wikimedia.org/w/index.php?title=Special:Redirect/file/Agaricus_californicus_2.jpg&width=800)

Photo: pellaea, CC BY 2.0 · [Wikimedia Commons](https://commons.wikimedia.org/wiki/File:Agaricus_californicus_2.jpg)

## Appearance

The California Agaricus has a white to yellowish cap, often bruising yellow, and a robust white stem. Its gills start pinkish and darken to chocolate brown as spores mature, making it visually distinct from some edible look-alikes.

## Taxonomy

- **Kingdom:** Fungi
- **Phylum:** Basidiomycota
- **Class:** Agaricomycetes
- **Order:** Agaricales
- **Family:** Agaricaceae
- **Genus:** Agaricus

## Interesting facts

- Despite its tasty-looking appearance, this mushroom will give you a tummy ache!
- It smells distinctly like carbolic acid, sometimes compared to ink or phenol!
- Its tiny spores, released by the billions, can travel far on the wind to grow new mushrooms.
- Mushrooms are actually more closely related to animals than they are to plants!

## Special abilities

- **Stinky Warning:** California Agaricus releases a strong carbolic (ink-like) odor that helps warn animals it's not good to eat.
- **Hidden Web:** California Agaricus has a vast underground network of mycelium that helps it break down nutrients in the soil.
- **Stomach Shield:** California Agaricus can produce compounds that cause stomach upset, helping protect itself from hungry creatures.

## Measurements & details

- **Height:** 5-10 cm
- **Edible:** poisonous
- **Size:** 8-18 cm
- **Growth Substrate:** soil
- **Season:** Fall, winter, spring
- **Spore Color:** Dark brown

## Ecological connections

- **Eaten by:** [Leopard slug](https://www.snappit.app/explore/leopard-slug) (*Limax maximus*) — Slugs sometimes munch on the mushroom's cap.
- **Eaten by:** Fungus gnat (*Sciara coprophila*) — Their larvae feed on the mushroom's tissues.
- **Depends on:** [Coast Live Oak](https://www.snappit.app/explore/coast-live-oak) (*Quercus agrifolia*) — Decomposes fallen leaves and organic debris nearby.

## Traits

- [Solitary](https://www.snappit.app/explore/traits/solitary): Solitary animals live alone for most of their lives, only interacting with others for mating or parental care.
- [Colorful](https://www.snappit.app/explore/traits/colorful): Colorful describes organisms or objects displaying a wide range of bright and distinct colors.
- [Herbivorous](https://www.snappit.app/explore/traits/herbivorous): This trait characterizes organisms whose diet consists entirely or primarily of plant material.
- [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

- [Fungi](https://www.snappit.app/explore/collections/fungi)

## Safety

**Danger:** 1/5 · Very low

Always ask an adult before picking or eating wild mushrooms!

## Frequently Asked Questions

### How to identify California Agaricus?

Compare the cap shape, the underside, the stem and base, and whether the fungus grows on wood or soil. Some fungi have gills, others pores or teeth. A cap seen only from above often hides the most useful features. Mushroom Identifier: upload a photo and compare the visible details.

### How tall is California Agaricus?

5-10 cm

### Is California Agaricus edible?

poisonous

### How big is California Agaricus?

8-18 cm

### Where is California Agaricus usually found?

California Agaricus thrives in forests, gardens, and grassy areas.

### What does California Agaricus grow on?

soil

### When is California Agaricus in season?

Fall, winter, spring

### What color are California Agaricus spores?

Dark brown

## Where to spot

- [Booster Park](https://www.snappit.app/guides/places/booster-park) — California, US · Park

## More Fungi

- [Field Mushroom](https://www.snappit.app/explore/field-mushroom) (*Agaricus*)
- [Button Mushroom](https://www.snappit.app/explore/button-mushroom) (*Agaricus*)
- [Portobello Mushroom](https://www.snappit.app/explore/portobello-mushroom) (*Agaricus*)
- [Shiitake](https://www.snappit.app/explore/shiitake) (*Lentinula*)

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Source: [California Agaricus: Facts & Places to See — Snappit](https://www.snappit.app/explore/california-agaricus)