# Yellow Fieldcap (*bolbitius titubans*)

The Yellow Fieldcap is a bright yellow mushroom that grows in grassy areas. It's fun to spot because its vibrant color stands out against the green grass!

- **Category:** [Fungi](https://www.snappit.app/explore/categories/fungi)
- **Rarity:** Common
- **Danger:** 1/5 · Very low
- **Snaps:** 2
- **Habitat:** Yellow Fieldcaps typically grow in meadows, fields, and grassy areas.
- **Also known as:** Golden Fieldcap, Sunny Fieldcap

![Yellow Fieldcap](https://commons.wikimedia.org/w/index.php?title=Special:Redirect/file/Bolbitius_titubans.JPG&width=800)

Photo: Victor M. Vicente Selvas, CC BY-SA 3.0 · [Wikimedia Commons](https://commons.wikimedia.org/wiki/File:Bolbitius_titubans.JPG)

## Appearance

The Yellow Fieldcap has a vibrant lemon-yellow cap that often fades to grayish-white at its edges as it matures, appearing like a tiny umbrella. Its cap starts bell-shaped but flattens out, often becoming sticky or slimy when wet, and is very delicate.

## Taxonomy

- **Kingdom:** Fungi
- **Phylum:** Basidiomycota
- **Class:** Agaricomycetes
- **Order:** Agaricales
- **Family:** Bolbitiaceae
- **Genus:** Bolbitius

## Interesting facts

- Its bright yellow cap can become almost flat like a pancake as it gets older!
- Its scientific name, Bolbitius titubans, sounds fancy but means 'wobbly'!
- The Yellow Fieldcap has fragile gills that easily get damaged, like delicate paper!
- These tiny mushrooms can appear and melt away in less than 24 hours!

## Special abilities

- **Quick Change Artist:** Yellow Fieldcap can grow incredibly fast after rain, sometimes popping up and dissolving in less than a day.
- **Nature's Recycler:** Yellow Fieldcap helps break down dead grass and plant material, turning old nutrients back into fresh soil.

## Measurements & details

- **Height:** 3-12 cm
- **Edible:** inedible
- **Size:** 1-6 cm
- **Growth Substrate:** soil
- **Season:** Spring to Fall
- **Spore Color:** Rusty brown

## Ecological connections

- **Eaten by:** Grey Field Slug (*Deroceras reticulatum*) — Slugs sometimes munch on its delicate caps.
- **Depends on:** Annual Bluegrass (*Poa annua*) — Decomposes dead blades and roots of this common grass.
- **Depends on:** Perennial Ryegrass (*Lolium perenne*) — Feeds on decaying organic matter from this widespread grass.

## 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.
- [Grassland](https://www.snappit.app/explore/traits/grassland): Grassland habitats are terrestrial biomes dominated by grasses and herbaceous plants, supporting a variety of grazing animals.
- [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.

## Collections

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

## Safety

**Danger:** 1/5 · Very low

Do not touch or eat wild mushrooms without adult supervision.

## Frequently Asked Questions

### How to identify Yellow Fieldcap?

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 Yellow Fieldcap?

3-12 cm

### Is Yellow Fieldcap edible?

inedible

### How big is Yellow Fieldcap?

1-6 cm

### Where is Yellow Fieldcap usually found?

Yellow Fieldcaps typically grow in meadows, fields, and grassy areas.

### What does Yellow Fieldcap grow on?

soil

### When is Yellow Fieldcap in season?

Spring to Fall

### What color are Yellow Fieldcap spores?

Rusty brown

## Where to spot

- [San Luis Obispo Botanical Garden](https://www.snappit.app/guides/places/san-luis-obispo-botanical-garden) — California, US · Botanical Garden
- [Caswell Memorial State Park](https://www.snappit.app/guides/places/caswell-memorial-state-park) — California, US · State 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: [Yellow Fieldcap: Facts & Places to See — Snappit](https://www.snappit.app/explore/yellow-fieldcap)