Helonias dioica, commonly known as American devil's bit, is a clump-forming deciduous plant from the genus Helonias in the Melanthiaceae family. It thrives in full sun on a south-facing, sheltered aspect, preferring fertile, moist but well-drained loam soil with a neutral pH. Hardy to UK zone H3, it is suitable for woodland gardens and moist borders. This cultivar is of interest in spring and summer and can be propagated by division or seed.

American devil's bit (Helonias dioica) is a clump-forming deciduous plant ideal for woodland gardens and moist borders, flowering in spring and summer.

Helonias dioica

Heloniopsis umbellata is a clump-forming evergreen cultivar within the Melanthiaceae family. It thrives in partial shade, ideally in a north-facing, sheltered position with fertile, well-drained loam soil that is neutral in pH and kept moist. Hardy to UK zone H5, this plant is well suited to woodland gardens and shaded borders. It is of interest during spring and summer and can be propagated by division or seed.

Heloniopsis umbellata is an evergreen clump-former for shaded woodland gardens, flowering in spring and summer with RHS hardiness H5.

Heloniopsis umbellata

Paris polyphylla is a species of flowering plant native to China, the Indian subcontinent, and Indochina. It produces spider-like flowers that throw out long, thread-like, yellowish green petals throughout most of the warm summer months and into the autumn. In the fall, the flowers are followed by small, scarlet berries. It is a perennial, which slowly spreads, is fully hardy in Britain, and survives in leafy, moist soil in either complete or partial shade. It grows to around 0.1-0.5 metres tall and 0.1-0.5 metres wide, carrying deciduous foliage. Grow it in full shade and most soil types. It tolerates acid and neutral soils, moist but well-drained conditions and east-facing and north-facing aspects.

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

Paris polyphylla

Paris polyphylla var. polyphylla is a clump-forming herbaceous perennial belonging to the genus Paris, which comprises 24 species of woodland plants native to Asia and Europe. This deciduous plant thrives in full shade, particularly in north-facing, sheltered locations with fertile, moist but well-drained loam soil of neutral pH. It is hardy in the UK (H6) and is best suited for woodland gardens or as underplanting. The plant is notable for its spider-like flowers with elongated, thread-like petals that appear in spring and summer. Propagation is typically done by division in autumn.

Paris polyphylla var. polyphylla is a hardy H6 herbaceous perennial ideal for shaded woodland gardens, flowering in spring and summer.

Paris polyphylla var. polyphylla

Paris verticillata 'Ryokutei' is a bushy, evergreen herbaceous perennial belonging to the genus Paris, which comprises 24 species known for their spider-like flowers with elongated, thread-like petals. This cultivar thrives in moist but well-drained loam or sandy soils with a range of pH levels, from acid to alkaline. It is hardy to UK zone H6 and can be grown in full sun or partial shade, suitable for various garden aspects and exposures. 'Ryokutei' is ideal for city and courtyard gardens, rock gardens, flower borders, and underplanting, offering interest in spring and summer.

Paris verticillata 'Ryokutei' is an evergreen herbaceous perennial with spider-like flowers, ideal for borders and containers, flowering in spring and summer.

Paris verticillata 'Ryokutei' (d)

Toxicoscordion is a herbaceous perennial in the Melanthiaceae family, featuring deciduous, linear leaves. It thrives in full sun or partial shade, ideally in south- or west-facing, sheltered positions. This cultivar prefers fertile, well-drained loam or sandy soils with a neutral pH. Hardy to UK zone H4, it is suitable for wildflower meadows and perennial borders. Interest is mainly in spring and summer, and propagation can be achieved by seed or division.

Toxicoscordion thrives in full sun or partial shade, hardy to RHS H4, perfect for wildflower meadows and perennial borders in spring and summer.

Toxicoscordion

Trillium aff. chloropetalum is a clump-forming cultivar of the Trillium genus, which comprises herbaceous perennials growing from rhizomes with upright stems topped by a whorl of ovate or diamond-shaped leaves. This deciduous plant thrives in partial shade with a sheltered aspect, preferring fertile, moist but well-drained loam or sandy soil that is acid to neutral in pH. Hardy to UK zone H5, it is suitable for cottage and informal gardens, flower borders, and underplanting of roses and shrubs. Interest is mainly in spring and summer, with propagation by division of rhizomes after flowering or seed sowing in a shady cold frame.

Trillium aff. chloropetalum is a hardy H5 perennial with ovate leaves, ideal for partial shade in cottage gardens and flower borders from spring to summer.

Trillium aff. chloropetalum

Trillium camschatcense is a clump-forming cultivar of the Trillium genus, which comprises herbaceous perennials growing from rhizomes with upright stems topped by a whorl of ovate or diamond-shaped leaves. This deciduous plant thrives in partial shade and prefers sheltered positions with moist but well-drained loam or sandy soil that is acid to neutral in pH. Hardy to UK zone H5, it is suitable for cottage and informal gardens, flower borders, and underplanting of roses and shrubs. Interest is shown in spring and summer, and propagation is by division of rhizomes after flowering or seed sowing in a shady cold frame.

Trillium camschatcense thrives in partial shade, hardy to RHS H5, ideal for low-maintenance borders and underplanting in spring and summer.

Trillium camschatcense

Trillium chloropetalum 'Spetchly Park' is a clump-forming herbaceous perennial belonging to the Melanthiaceae family. Like other Trillium species, it grows from rhizomes and features upright stems topped with a whorl of ovate or diamond-shaped deciduous leaves. This cultivar thrives in partial shade with sheltered exposure, preferring moist but well-drained loam or sandy soils that are acid to neutral in pH. Hardy to UK zone H5, it is suitable for cottage and informal gardens, flower borders, and underplanting roses and shrubs, offering seasonal interest in spring and summer.

Trillium chloropetalum 'Spetchly Park' is a hardy H5 herbaceous perennial ideal for partial shade, flowering in spring and summer for low-maintenance borders

Trillium chloropetalum 'Spetchly Park'

Trillium chloropetalum, also known as giant trillium, giant wakerobin, or common trillium, is a species of flowering plant in the family Melanthiaceae. It is endemic to the western U.S.

Trillium chloropetalum pink-flowered is a hardy H5 plant for partial shade, ideal for cottage gardens and underplanting, blooming in spring and summer.

Trillium chloropetalum pink-flowered

Trillium cuneatum, the little sweet betsy, also known as whip-poor-will flower, large toadshade, purple toadshade, and bloody butcher, is a species of flowering plant in the family Melanthiaceae. It is a member of the Trillium cuneatum complex, a subgroup of the sessile-flowered trilliums.

Little sweet Betsy (Trillium cuneatum) blooms in spring and summer, thrives in partial shade, and suits cottage gardens and underplanting with roses.

Trillium cuneatum

Trillium erectum red-flowered is a clump-forming cultivar of the Trillium genus, which comprises herbaceous perennials growing from rhizomes with upright stems topped by a whorl of ovate or diamond-shaped leaves. This deciduous plant produces one or more erect flowers at the stem apex in spring and summer. It thrives in partial shade with a sheltered aspect, preferring moist but well-drained loam or sandy soils that are acid to neutral in pH. Hardy to UK zone H5, it suits cottage and informal gardens, flower borders, and underplanting of roses and shrubs, requiring fertile, well-drained soil for best growth.

Trillium erectum red-flowered is a hardy H5 perennial with upright stems and red flowers, ideal for partial shade in cottage gardens and flower borders.

Trillium is a genus of about fifty flowering plant species in the family Melanthiaceae. Trillium species are native to temperate regions of North America and Asia, with the greatest diversity of species found in the southern Appalachian Mountains in the southeastern United States.

Trillium erectum red-flowered

Trillium flexipes erect, known as erect nodding wake-robin, is a clump-forming deciduous perennial from the Melanthiaceae family. This cultivar features upright stems topped with a whorl of ovate or diamond-shaped leaves, bearing flowers that stand erect. It thrives in partial shade with sheltered exposure, preferring moist but well-drained loam or sandy soils with acid to neutral pH. Hardy to UK zone H5, it is suitable for cottage and informal gardens, flower borders, and underplanting of roses and shrubs. It flowers in spring and summer and can be propagated by division of rhizomes or seed sowing in a shady cold frame.

Erect nodding wake-robin (Trillium flexipes erect) thrives in partial shade, hardy to RHS H5, ideal for low-maintenance borders and underplanting in spring and

Trillium flexipes erect

Trillium foetidissimum, known as Mississippi River wake-robin, is a clump-forming herbaceous perennial in the Melanthiaceae family. Like other Trillium species, it grows from rhizomes with upright stems topped by a whorl of ovate or diamond-shaped leaves, bearing flowers at the stem apex. This deciduous plant thrives in partial shade with sheltered exposure and prefers moist but well-drained loam or sandy soil with acid to neutral pH. Hardy to UK zone H5, it is suited to cottage and informal gardens, flower borders, and underplanting of roses and shrubs, offering interest in spring and summer.

Trillium foetidissimum, or Mississippi River wake-robin, is a hardy H5 perennial ideal for shady borders and underplanting, flowering in spring and summer.

Trillium foetidissimum

Trillium grandiflorum 'Kath's Dwarf' is a clump-forming cultivar of the Trillium genus, which comprises herbaceous perennials growing from rhizomes with upright stems topped by a whorl of ovate or diamond-shaped leaves. This deciduous plant thrives in partial shade and prefers sheltered north, east, or west-facing aspects. It grows best in fertile, moist but well-drained loam or sandy soils with an acid to neutral pH. Hardy to UK zone H5, it is suitable for cottage and informal gardens, flower borders, and underplanting of roses and shrubs, offering interest in spring and summer.

Trillium grandiflorum 'Kath's Dwarf' is a hardy, low-maintenance perennial ideal for partial shade, flowering in spring and summer in cottage and informal

Trillium grandiflorum 'Kath's Dwarf'

Trillium ovatum f. hibbersonii is a clump-forming cultivar of the Trillium genus, which comprises herbaceous perennials growing from rhizomes with upright stems topped by a whorl of ovate or diamond-shaped leaves. This deciduous plant thrives in partial shade and prefers sheltered positions with moist but well-drained loam or sandy soil that is acid to neutral in pH. Hardy to UK zone H5, it is suitable for cottage and informal gardens, flower borders, and underplanting of roses and shrubs. Its season of interest spans spring and summer.

Trillium ovatum f. hibbersonii is a hardy, clump-forming perennial ideal for partial shade, flowering in spring and summer in cottage and informal gardens.

Trillium ovatum f. hibbersonii

Trillium parviflorum is a clump-forming cultivar of the Trillium genus, which comprises herbaceous perennials growing from rhizomes with upright stems topped by a whorl of ovate or diamond-shaped leaves. This deciduous plant thrives in partial shade, favouring north, east, or west-facing sheltered aspects. It prefers moist but well-drained loam or sandy soils with an acid to neutral pH. Hardy to UK zone H5, it is suitable for cottage and informal gardens, flower borders, beds, and underplanting of roses and shrubs. Interest is shown in spring and summer, with cultivation requiring watering during establishment and propagation by division or seed sowing in a shady cold frame.

Trillium parviflorum thrives in partial shade, is hardy to RHS H5, and suits cottage gardens, borders, and underplanting with spring to summer interest.

Trillium parviflorum

Trillium pusillum var. virginianum is a clump-forming cultivar of the Trillium genus, which comprises herbaceous perennials growing from rhizomes with upright stems topped by a whorl of ovate or diamond-shaped leaves. This deciduous plant thrives in partial shade and prefers sheltered positions with moist but well-drained loam or sandy soil, favouring acid to neutral pH. Hardy to UK zone H5, it is suitable for cottage and informal gardens, flower borders, and underplanting roses and shrubs. It flowers in spring and summer, adding seasonal interest to shaded garden areas.

Trillium pusillum var. virginianum thrives in partial shade, is hardy to H5, and suits cottage gardens, borders, and underplanting in spring and summer.

Trillium pusillum var. virginianum

Trillium rivale 'Del Norte' is a clump-forming cultivar of the Trillium genus, which comprises herbaceous perennials growing from rhizomes with upright stems topped by a whorl of ovate or diamond-shaped leaves. This deciduous plant thrives in partial shade and prefers sheltered positions with moist but well-drained loam or sandy soil that is acid to neutral in pH. Hardy to UK zone H5, it is suitable for cottage and informal gardens, flower borders, and underplanting roses and shrubs. Its season of interest spans spring and summer, and it can be propagated by division of rhizomes after flowering or by seed sowing in a shady cold frame.

Trillium rivale 'Del Norte' is a hardy H5 clump-forming perennial with ovate leaves, ideal for partial shade, spring-summer interest, and low-maintenance

Trillium rivale 'Del Norte'

Trillium rivale 'Winifred Murray' is a clump-forming herbaceous perennial belonging to the genus Trillium, known for its upright stems topped with a whorl of ovate or diamond-shaped leaves. This deciduous plant thrives in partial shade with a north, east, or west-facing aspect and prefers sheltered positions. It grows best in fertile, moist but well-drained loam or sandy soils with an acid to neutral pH. Hardy to UK zone H5, it is suitable for cottage and informal gardens, flower borders, and underplanting of roses and shrubs, offering interest in spring and summer.

Trillium rivale 'Winifred Murray' is a hardy H5 herbaceous perennial with diamond-shaped leaves, ideal for partial shade and cottage gardens in spring and

Trillium rivale 'Winifred Murray'

Trillium rivale pink-flowered is a clump-forming cultivar of the Trillium genus, which comprises herbaceous perennials growing from rhizomes with upright stems topped by a whorl of ovate or diamond-shaped leaves. This deciduous plant thrives in partial shade and prefers sheltered positions with moist but well-drained loam or sandy soil, tolerant of acid to neutral pH. Hardy to UK zone H5, it is suitable for cottage and informal gardens, flower borders, and underplanting of roses and shrubs. Interest is shown in spring and summer, with cultivation involving planting in well-drained soil and watering during establishment.

Trillium rivale pink-flowered thrives in partial shade, is hardy to RHS H5, and suits low-maintenance cottage gardens and flower borders in spring and summer.

Trillium rivale pink-flowered

Trillium rugelii pink-flowered is a clump-forming cultivar of the Trillium genus, which comprises herbaceous perennials growing from rhizomes with upright stems topped by a whorl of ovate or diamond-shaped leaves. This deciduous plant thrives in partial shade and prefers sheltered, north-, east-, or west-facing aspects. It grows best in moist but well-drained loam or sandy soils with acid to neutral pH. Hardy to UK zone H5, it is suitable for cottage and informal gardens, flower borders, and underplanting of roses and shrubs, offering interest in spring and summer.

Trillium rugelii pink-flowered is a hardy, clump-forming perennial ideal for partial shade, flowering in spring and summer in cottage and informal gardens.

Trillium rugelii pink-flowered

Trillium sulcatum yellow-flowered is a clump-forming cultivar of the Trillium genus, which comprises herbaceous perennials growing from rhizomes with upright stems topped by a whorl of ovate or diamond-shaped leaves. This deciduous plant produces distinctive yellow flowers in spring and summer. It thrives in partial shade with a sheltered aspect, preferring fertile, moist but well-drained loam or sandy soils that are acid to neutral in pH. Hardy to UK zone H5, it is suitable for cottage and informal gardens, flower borders, and underplanting of roses and shrubs.

Trillium sulcatum yellow-flowered is a hardy H5 perennial with yellow blooms, ideal for partial shade in cottage gardens and flower borders from spring to

Trillium sulcatum yellow-flowered

Trillium vaseyi f. album is a clump-forming cultivar of the Trillium genus, which comprises herbaceous perennials growing from rhizomes with upright stems topped by a whorl of ovate or diamond-shaped leaves. This deciduous plant thrives in partial shade and prefers sheltered positions with moist but well-drained loam or sandy soils that are acid to neutral in pH. Suitable for cottage and informal gardens, flower borders, and underplanting of roses and shrubs, it is hardy to UK zone H5 and offers seasonal interest in spring and summer.

Trillium vaseyi f. album is a clump-forming perennial with ovate leaves, thriving in partial shade and ideal for low-maintenance borders and underplanting.

Trillium vaseyi f. album

Veratrum nigrum, the black false hellebore, is a widespread Eurasian species of perennial flowering plant in the family Melanthiaceae. Despite its common name, V. nigrum is not closely related to the true hellebores, nor does it resemble them. The plant was widely known even in ancient times. It is native to Southern Asia, Albania, Altay, Amur, Austria and other regions. Mature plants reach roughly 1-1.5 metres tall and 0.1-0.5 metres wide, carrying deciduous foliage. In the garden it prefers full sun and partial shade and most soil types. It tolerates acid and neutral soils, moist but well-drained conditions and south-facing, west-facing and east-facing aspects.

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

Veratrum nigrum

Veratrum nigrum, the black false hellebore, is a widespread Eurasian species of perennial flowering plant in the family Melanthiaceae. Despite its common name, V.

Veratrum nigrum var. ussuriense is a hardy perennial for full sun or partial shade, ideal for borders and wildlife gardens with spring to summer interest.