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Petalwort

Petalophyllum ralfsii

Petalwort
Photo: Young Jun Lee, CC BY 4.0

Petalwort (Petalophyllum ralfsii) is a small, flat, green liverwort (a non-flowering moss-like plant) that grows on damp sand dunes in Europe. It is a wild species rarely grown in gardens, and it needs open, damp dune-slack conditions to survive.

Family
Petalophyllaceae (Petalophyll family)
Light
Full sun, Part shade
Water
Keep the sand or substrate damp, not waterlogged, and never let it dry out fully.
Soil
Damp, sandy, low-nutrient dune substrate, often on low hummocks.
Temperature
Cool to mild temperate conditions suited to European dune slacks; sensitive to hot, dry spells.
How easy
Hard

About

Petalophyllum ralfsii, commonly known as petalwort, is a species of liverwort in the order Fossombroniales. It is a small green bryophyte that occurs in the Mediterranean region as far east as Turkey, and along the Atlantic coast of Europe as far as north-western Scotland. It grows primarily on moist sand dunes.

Where it grows

Petalophyllum ralfsii has a widespread distribution across Europe, primarily in the Mediterranean region. It has a specific habitat requirement, being restricted to dune slacks with certain features; it needs open, damp conditions, often growing on low hummocks rather than on the wettest parts of the slack. In Britain, the largest population occurs at Achnahaird in Scotland, the most northerly point in its range. Other locations include Braunton Burrows and Dawlish Warren in Devon; Kenfig, Aberffraw and the Carmarthen Bay dunes in Wales; Lindisfarne off the coast of Northumberland; the Isles of Scilly and the Sefton Coast in Merseyside. These dunes are increasingly under threat, leading to the species being classified as "vulnerable", and the British Isles may now be the liverwort's stronghold.

Other Petalophyllum plants

Petalophyllum americanum · Petalophyllum preissii · Petalophyllum

Text excerpted from the Wikipedia article Petalophyllum ralfsii by its contributors, under CC BY-SA 4.0; the excerpts and the care summary drawn from them are shared under the same licence.

The care summary was written by AI (Claude, Anthropic) from the sources on this page, with general growing knowledge where they are silent. Check before relying on it.

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