# Yellow Mariposa Lily (*calochortus luteus*)

The Yellow Mariposa Lily (Calochortus luteus) is a striking perennial wildflower endemic to California, where it graces grasslands, oak woodlands, and chaparral with its vibrant golden blooms. Rising from a hardy underground bulb, this member of the lily family showcases a remarkable resilience to dry Mediterranean summers, lying dormant during the hottest months before bursting into color in late spring. Its elegant, cup-shaped flowers not only delight hikers and nature enthusiasts but also serve as vital nectar sources for local pollinators, making it an ecological cornerstone of its native habitats.

- **Category:** [Plants](https://www.snappit.app/explore/categories/plant)
- **Rarity:** Common
- **Danger:** 1/5 · Very low
- **Snaps:** 2
- **Habitat:** Found in open grasslands, oak woodlands, and chaparral slopes throughout California, often in heavy clay or gravelly soils.

![Yellow Mariposa Lily](https://inaturalist-open-data.s3.amazonaws.com/photos/1758936/medium.jpg)

Photo: Don Loarie, CC BY 4.0 · [iNaturalist](https://www.inaturalist.org/photos/1758936)

## Appearance

This plant features upright, slender stems reaching 15 to 50 centimeters tall, bearing one to several upright, bell-to-cup-shaped flowers. The petals are a deep, brilliant yellow, intricately decorated on the inside with reddish-brown spots, lines, and a dense, hairy, crescent-shaped nectary gland near the base. The narrow, grass-like leaves are sparse, often drying up by the time the bright golden flowers fully open in late spring or early summer.

## Taxonomy

- **Kingdom:** Plantae
- **Phylum:** Tracheophyta
- **Class:** Liliopsida
- **Order:** Liliales
- **Family:** Liliaceae
- **Genus:** Calochortus

## Interesting facts

- Indigenous peoples of California, such as the Miwok and Maidu, historically harvested and roasted the nutritious bulbs as a seasonal food source.
- The common name 'Mariposa' is the Spanish word for butterfly, which describes how the flowers seem to flutter like colorful wings in the grassland breeze.
- The genus name Calochortus is derived from Greek words meaning 'beautiful grass', referring to its elegant grass-like leaves and stunning flowers.

## Special abilities

- **Summer Dormancy:** The plant survives harsh, dry Mediterranean summers by dying back to an underground bulb, conserving energy and water until winter rains return.
- **Nectary Guides:** Petals feature complex, UV-reflecting yellow-and-red patterns and hairy glands that act as precise maps to guide pollinating insects directly to nectar.
- **Pyrophytic Resilience:** This species is well-adapted to wildfire-prone ecosystems, using deep-seated bulbs that remain unharmed by surface fires and quickly sprout in nutrient-rich post-burn soil.

## Measurements & details

- **Length:** 15-50 cm
- **Lifespan:** 3-10 years

## Diet & Feeding

As a photosynthetic plant, the Yellow Mariposa Lily produces its own food by converting sunlight, water, and carbon dioxide into sugars.

- **Primary Foods:** Sunlight, Water, Carbon dioxide, Soil nutrients

## Ecological connections

- **Mutualism:** Yellow-faced Bumblebee (*Bombus vosnesenskii*) — The bumblebee visits the flowers for nectar, acting as a primary pollinator for the species.
- **Eaten by:** [Botta's Pocket Gopher](https://www.snappit.app/explore/bottas-pocket-gopher) (*Thomomys bottae*) — Pocket gophers burrow underground and feed on the nutrient-rich bulbs of the plant.
- **Eaten by:** [Mule Deer](https://www.snappit.app/explore/mule-deer) (*Odocoileus hemionus*) — Deer graze on the fresh green leaves and tender flower buds in early spring.

## Safety

**Danger:** 1/5 · Very low

No special safety notes yet.

## Frequently Asked Questions

### How to identify Yellow Mariposa Lily?

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 long is Yellow Mariposa Lily?

15-50 cm

### How long does Yellow Mariposa Lily live?

3-10 years

### What does Yellow Mariposa Lily eat?

As a photosynthetic plant, the Yellow Mariposa Lily produces its own food by converting sunlight, water, and carbon dioxide into sugars.

### Where is Yellow Mariposa Lily usually found?

Found in open grasslands, oak woodlands, and chaparral slopes throughout California, often in heavy clay or gravelly soils.

## Where to spot

- [Jasper Ridge Biological Preserve](https://www.snappit.app/guides/places/jasper-ridge-biological-preserve) — California, US · Nature Reserve
- [Monte Bello Open Space Preserve](https://www.snappit.app/guides/places/monte-bello-open-space-preserve) — California, US · Nature Reserve
- [Angel Island Immigration Station](https://www.snappit.app/guides/places/angel-island-immigration-station) — US · Historic Site

[View all places to see Yellow Mariposa Lily](https://www.snappit.app/guides/where-to-see/yellow-mariposa-lily)

## 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: [Yellow Mariposa Lily: Facts & Places to See — Snappit](https://www.snappit.app/explore/yellow-mariposa-lily)