Wood Poppy (Stylophorum diphyllum)

Wood Poppy, also commonly known as Celandine Poppy is a native perennial herb that grows in woodlands in Ontario, among other places. With its bright yellow, poppy-like flowers it's an in demand plant for Native Plant aficionados. With distinctive lobed leaves and a preference for shaded habitats, Wood Poppy adds a burst of colour to the under-story of the woodlands.

This plant is not common, partially due to logging and forest clearance. As *Stylophorum diphyllum* requires certain lighting, too much sunlight through the forest canopy is responsible for the threat to this, and other under-story plants. As a result Wood Poppy is endangered according to both COSEWIC (Committee on the Status of Endangered Wildlife in Canada) and NatureServe Since it is present only in Ontario within Canada, the next stage of endangerment would be Extirpation.

## CAUTION: Invasive Look-Alike

Greater celandine (*Chelidonium Majus*) - Similar European Plant. For details on spotting the difference, Consult bplant.org

## CAUTION: Invasive Threat

Invasive Garlic Mustard is also a big threat to the survival of *Stylophorum diphyllum*.

## Benefits

### Uses

Wildlife Food Source, Pollinators, Aesthetic, Woodland, Pond, Containers, Cottage style gardens, Walkways, Border, Mass Planting

## Sowing and Reproduction

There is no gender requirement to grow Wood Poppy*.* The plant is bisexual and pollination is all it needs.

**Method**

No information found on depth or method.

**Cold Stratification**

Unusually, *Stylophorum diphyllum* requires a warm period of moist stratification before the cold period of winter. If sowing outside this means it would be sown in spring. As a result it is thought to need double dormancy, but if sown in spring will grow by next spring. If sowing in containers, treat like a winter-sow plant, but start in spring instead.

Other sources claim they need only three months cold moist stratification and then warmth.

## Harvesting

Collect the bristly capsules when they are yellow, or just before they begin to split open. Make sure that the seeds are almost black, if not they are not ready to be picked.

## Storage

Make sure the capsules are not dried for more than a day or two. Pop open capsules that have not opened and
remove chaff. Seeds must not be allowed to dry out and must be sown fresh or stored moist in vermiculite or sand, until time of sowing.

## Toxicity

**Strength:** Low severity.

**Toxic to:**

* **Humans:** Toxic on ingestion, but mild severity. Can also cause contact issues on skin or eyes.
* **Dogs and** **Cats:** Unknown, but given human toxicity it could have worse effects on animals.
* **Livestock:** Unknown, but given human toxicity it could have worse effects on animals.
* **Other:** Mammals ignore this plant and it rarely suffers insect damage, meaning it may be toxic to these as well.

1. ↑ Photo by Cbaile19 - Public Domain
2. ↑ Photo by Tulipasylvestris - Creative Commons 4.0 No changes made
3. ↑ Wikipedia
4. ↑ Recovery Strategy for Wood Poppy
5. ↑ NatureServe Explorer
6. ↑ Picture by Alvesgaspar. Creative Commons 3.0. No Changes Made
7. ↑ NC State Extension
8. ↑ Photo by O. Pichard - Creative Commons License, No Changes made
9. ↑ Prairie Moon Nursery
10. ↑ 10.0 10.1 Wild Plants From Seed
11. ↑ Photo by James Hade - Creative Commons License, No changes made
12. ↑ Wild Plants From Seed
13. ↑ PictureThis Plant AI