Photo: Walter Siegmund (talk), CC BY-SA 3.0 (via Wikimedia Commons)

One-flowered Wintergreen

Moneses uniflora

Also known as Single Delight, Wood Nymph, St. Olaf's Candlestick, One-flowered Pyrola

At a glance

Family

Ericaceae, the heath family (long placed in its own family, Pyrolaceae, until genetic studies folded it in)

Type

Evergreen perennial woodland herb

Parts used

Leaves, in scattered and limited folk tradition only; the plant is not a working household herb today

Size

2 to 6 inches tall (5 to 15 cm), with a single nodding flower held just above a low rosette of leaves

Bloom

Early to midsummer, one solitary waxy-white flower per plant

Habitat

Cool, mossy floors of coniferous and mixed forests across the Northern Hemisphere, from the Pacific Northwest and Rocky Mountains to Scandinavia and the boreal forests of Asia

Acquisition

Forage

This plant in HerbSense

Key benefits

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Marks untouched old-growth forest

Sweetly fragrant single bloom

Rare, cherished woodland find

Historic though very limited folk use

Traditional uses

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One-flowered wintergreen has always charmed forest walkers far more than it ever filled an apothecary shelf, and records of any medicinal use are thin and scattered compared to those of its wintergreen cousins. In a few accounts from the Pacific Northwest and boreal forest, Indigenous peoples are recorded using the closely related pyrolas, and occasionally noting this plant among them, as a mild wash for cuts and minor sores, though the tradition is nowhere near as well documented as that of relatives like pipsissewa. Because the plant depends on an underground partnership with forest fungi and rarely survives being dug up or moved, it has always been treated more as a woodland treasure to notice quietly than an herb to gather in any quantity. Its truest legacy is botanical rather than medicinal, a single perfect flower that gave the genus its Latin name, meaning solitary delight.

How to grow & use it

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✦ Growing guide
✦Harvest & storage

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Pairs well with

✦Twinflower (Linnaea borealis)
✦Pyrola (wintergreen)
✦Wood sorrel

Substitutes

✦Pipsissewa (Chimaphila umbellata)
✦Round-leaved wintergreen (Pyrola rotundifolia)

Choose it when

“For the hush of an old forest floor, and a single white star nodding low in the moss.”

Did you know?

Moneses uniflora cannot live on sunlight alone. Its roots tap into underground fungal threads shared with nearby trees, quietly borrowing sugar the way its shadowy cousins, the leafless mycoheterotrophic orchids, do. That hidden partnership is exactly why the plant almost never survives being dug up and replanted in a garden.

Safety

There's no reliable evidence that one-flowered wintergreen is safe to eat, and it isn't an established herb. It's also rare in parts of its range and depends on a fungal partnership to survive, so digging or picking it usually kills it.