Disporum 'Night Heron' is a clump-forming, columnar upright perennial in the Colchicaceae, valued for its flowering from May to July. It carries deciduous foliage and performs best in partial shade on moist but well-drained soils. Plant in a sheltered spot and choose north-, east- or west-facing positions to suit its needs. It is rated H6, equivalent to very hardy in UK conditions.

Disporum 'Night Heron' is a clump-forming shade perennial with deciduous foliage that flowers from May to July.

Disporum 'Night Heron'

Fairy Bells | Disporum 'Night Heron'

Disporum pullum is a species in the genus Disporum, placed in the family Colchicaceae. It belongs to a group of roughly 20 perennial Asian species and flowers in the UK from May to July. Plants in the genus produce pendent, bell-like blooms on herbaceous stems. In cultivation it suits situations that show off its spring–summer flowering period.

Fairy Bells (Disporum pullum) is a Disporum species in the Colchicaceae that flowers in the UK from May to July.

Disporum is a genus of about 20 species of perennial flowering plants, found in Asia from northern India to Japan, south to Indonesia and north into the Russian Far East.

Disporum pullum

Fairy Bells | Disporum pullum

Disporum sessile is a perennial herb from Japan and Korea that grows to about 0.6 m. It flowers from May to July and prefers partial to full shade in sheltered sites. The plant does best in moist but well-drained sandy, loamy or clay soils of acidic to neutral pH. Use it as a low understorey or ground cover in woodland and shade gardens.

Sessile fairy bells (Disporum sessile) is a shade-loving perennial that flowers May to July and suits woodland and shade gardens.

Disporum sessile

Sessile fairy bells | Disporum sessile

Disporum sessile 'Variegatum' is a perennial in the Colchicaceae valued for its variegated foliage and compact habit. It reaches about 0.6 m and favours shady, sheltered positions. Flowering occurs from May to July. It performs best in moist but well-drained sandy, loamy or clay soils.

Disporum sessile 'Variegatum' is a variegated perennial reaching 0.6 m that flowers from May to July and suits shaded borders and woodland gardens.

Disporum sessile 'Variegatum'

Fairy Bells | Disporum sessile 'Variegatum'

Uvularia grandiflora is a perennial herbaceous plant in the Colchicaceae, noted for nodding yellow, bell-shaped flowers. It typically grows to about 0.3 m and prefers full shade. Flowers appear April to May, and the species is used for naturalising in woodland conditions.

Large-flowered bellwort (Uvularia grandiflora) is a fully hardy woodland perennial that blooms April to May with nodding yellow flowers.

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

Uvularia is a genus of flowering plants in the family Colchicaceae, which is closely related to the lily family (Liliaceae). They are commonly called bellworts, bellflowers, or merrybells.

Uvularia grandiflora

Large-flowered bellwort | Uvularia grandiflora

Uvularia perfoliata is a perennial forb that bears nodding, pale yellow bell-shaped flowers in April to May. It reaches about 0.4 m and often shows leaves that appear to clasp the stem, giving the species its common name. It prefers full shade on moist but well‑drained sandy or loamy soils and is fully hardy in UK gardens (H7; USDA 4–8). The brief spring display is most noticeable at the woodland floor level.

Perfoliate bellwort Uvularia perfoliata produces pale yellow nodding bells in April–May and favours moist, well‑drained sandy or loamy soils in full shade.

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

Uvularia perfoliata

Perfoliate bellwort | Uvularia perfoliata

Uvularia sessilifolia is a spring-flowering perennial herb native to eastern Canada and the eastern United States, notable for its early-season creamy-yellow blooms. It grows to about 0.3 m and favours full shade on moist, well-drained sandy or loamy soils. Fully hardy in the UK (H7), it is suited to woodland and naturalising plantings.

Sessile bellwort (Uvularia sessilifolia) is a shade-loving perennial that flowers in April to May and suits woodland and naturalised plantings.