Yellow Pimpernel

lysimachia nemorum

The Yellow Pimpernel (Lysimachia nemorum) is a charming, low-growing perennial wildflower native to the damp, shaded woodlands of Europe. Belonging to the primrose family (Primulaceae), this delicate plant creeps along the forest floor, forming loose mats of bright green foliage dotted with star-like yellow flowers. Often found in ancient deciduous woods, it serves as a wonderful indicator of rich, undisturbed damp woodland ecosystems. Unlike its cousin, the Scarlet Pimpernel, which prefers open, sunny fields, the Yellow Pimpernel thrives in the cool dappled shade of canopy trees. It has a long blooming season from May to September, providing a cheerful splash of color along woodland paths and stream banks when many other forest flowers have faded. Spot a Yellow Pimpernel? Identify it instantly with the Snappit nature app.

Habitat: Typically found in damp deciduous woodlands, shaded stream banks, and wet, mossy clearings.

Appearance

Yellow Pimpernel is a hairless, creeping perennial with prostrate or decumbent stems ranging from 10 to 30 cm in length. Its smooth, bright green leaves are ovate, pointed, and arranged in opposite pairs along the reddish-tinged stems. The small, solitary flowers are about 12-15 mm across, boasting five bright yellow, pointed petals and five slender, yellow stamens. These delicate blooms are supported by long, thread-like stalks that arise from the leaf axils, gracefully nodding before opening fully to face the sky.

KingdomPlantaePhylumTracheophytaClassMagnoliopsidaOrderEricalesFamilyPrimulaceaeGenusLysimachia

Yellow Pimpernel

Interesting facts

Because it thrives primarily in undisturbed, damp woodlands, ecologists frequently use this species as an indicator of ancient, healthy woodland habitats.

Despite its common name, the Yellow Pimpernel is actually more closely related to loosestrifes than to the true Scarlet Pimpernel.

Its flowers do not produce any nectar; they rely solely on offering abundant pollen to attract hoverflies and small solitary bees for pollination.

Special abilities

Thrives in low-light environments by optimizing chlorophyll production, allowing it to carpet forest floors under dense tree canopies.

Its trailing stems produce adventitious roots at the nodes when they touch damp soil, enabling rapid vegetative spread and stabilization on banks.

The delicate yellow flowers open fully in bright daylight but close during heavy overcast weather or rain to protect their pollen from moisture.

Measurements & details

Length: 10-30 cm
Lifespan: 2-5 years

Diet & Feeding

As a photoautotrophic plant, it produces its own energy using sunlight, water, and carbon dioxide through photosynthesis, supplemented by soil nutrients.

Primary Foods

Sunlight
Water
Carbon Dioxide
Soil Nitrogen
Phosphorus

Ecological connections

mutualism

Hoverfly

Meliscaeva cinctella

Visits the flowers to feed on pollen, acting as a pollinator despite the plant producing no nectar.

eaten by

Black Slug

Arion ater

Feeds on the soft, damp leaves of the creeping stems on the forest floor.

competitor

Broad Buckler-fern

Dryopteris dilatata

Competes with the Yellow Pimpernel for floor space and sunlight in damp woodland environments.

Traits

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Also known as

No aliases listed yet.

Collections

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Safety

Danger

1/5 · Very low

No special safety notes yet.

Frequently Asked Questions

How to identify Yellow Pimpernel?

The easiest way to identify Yellow Pimpernel is to use the Snappit nature identifier app.

How long is Yellow Pimpernel?

10-30 cm

How long does Yellow Pimpernel live?

2-5 years

What does Yellow Pimpernel eat?

As a photoautotrophic plant, it produces its own energy using sunlight, water, and carbon dioxide through photosynthesis, supplemented by soil nutrients.

Where is Yellow Pimpernel usually found?

Typically found in damp deciduous woodlands, shaded stream banks, and wet, mossy clearings.