Osmunda cinnamomea is a fern that prefers consistently moist to wet, acidic, humus-rich soil in shaded, sheltered spots. It belongs to the Osmundaceae and is native to Trop. America & SE Asia. Plant in partial shade or shade in sheltered positions; it is hardy to H5 (hardy). It suits woodland gardens, bog gardens and naturalising and is most evident through spring and summer.

Cinnamon fern (Osmunda cinnamomea) thrives in moist, acidic, humus-rich soils in shade and suits bog and woodland gardens.

https://en.wikipedia.org/wiki/Osmundastrum_cinnamomeum

Osmundastrum is genus of leptosporangiate ferns in the family Osmundaceae with one living species, Osmundastrum cinnamomeum, the cinnamon fern. The modern species is native to the Americas and Asia, growing in swamps, bogs and moist woodlands.

Osmunda cinnamomea

Cinnamon fern | Osmunda cinnamomea

Osmunda claytoniana is a fern commonly known as the interrupted fern. It typically reaches about 0.5 m and produces fronds through spring and summer. It grows in moist to wet soils that are acidic to neutral and will tolerate sandy, loamy or clay textures. It is fully hardy (H7) in the UK.

Interrupted fern Osmunda claytoniana suits moist, acidic to neutral soils in partial shade and works well in woodland and naturalised areas.

https://en.wikipedia.org/wiki/Claytosmunda

Claytosmunda is a genus of fern. It has only one extant species, Claytosmunda claytoniana, the interrupted fern, native to Eastern Asia, Eastern United States, and Eastern Canada.

Osmunda claytoniana

Interrupted fern | Osmunda claytoniana

Osmunda lancea is a deciduous fern cultivar within the Osmunda genus, known for medium to large clump-forming ferns that thrive in moist environments. This fern features upright or arching fronds that emerge in spring and summer, adding seasonal interest. It is adaptable to a range of light conditions from full sun to full shade and can grow in various soil types including chalk, clay, loam, and sand, with moisture levels from moist but well-drained to poorly-drained soils. Suitable for wildflower meadows, cottage gardens, and underplanting, it prefers moist, humus-rich soil and can be propagated by sowing spores or division.

Osmunda lancea is a hardy deciduous fern with upright fronds, ideal for moist, shaded spots and low-maintenance cottage or wildflower gardens.

Osmunda lancea

Osmunda regalis, or royal fern, is a species of deciduous fern, native to Europe, North Africa and West Asia, growing in woodland bogs and on the banks of streams. The species is sometimes known as flowering fern due to the appearance of its fertile fronds.

Royal fern (Osmunda regalis) is a hardy deciduous fern ideal for shady bogs and woodland gardens, adding autumn interest and low-maintenance greenery.

https://en.wikipedia.org/wiki/Osmunda_regalis

Osmunda is a genus of primarily temperate-zone ferns of family Osmundaceae. Five to ten species have been listed for this genus.

Osmunda regalis

Royal fern | Osmunda regalis

Osmunda regalis 'Cristata' is a fern in the Osmundaceae that typically grows to about 2.0 m. It prefers full sun and suits sandy, loamy or clay soils that remain moist or wet, or are at least moist but well-drained. With a UK hardiness of H7 (USDA 4–9) it is fully hardy and reliably provides seasonal interest through the summer. The cultivar epithet 'Cristata' identifies it as a named selection within the Osmunda genus.

Royal fern 'Cristata' (Osmunda regalis 'Cristata') reaches about 2.0 m and thrives in full sun on moist or wet sandy, loamy or clay soils.

Osmunda regalis 'Cristata'

Royal fern 'Cristata' | Osmunda regalis 'Cristata'

Royal fern 'Purpurascens' is a deciduous fern ideal for partial shade, hardy to H6, perfect for wildflower meadows and underplanting in spring and summer.

Osmunda regalis 'Purpurascens'

Royal fern 'Purpurascens' | Osmunda regalis 'Purpurascens'

Osmunda regalis var. gracilis is a fern that reaches around 2.0 m and is notable for its tall, architectural fronds. It originates from SFF Iguaque. Plant it in full sun on sandy, loamy or clay soils that remain moist to wet. It is fully hardy in the UK (H7) and is most relevant in spring and summer.

Royal fern (Osmunda regalis var. gracilis) prefers moist sandy to clay soils in full sun and is fully hardy (H7) in the UK.