Orlaya grandiflora, the white laceflower, is a species of flowering plant in the family Apiaceae, native to Mediterranean Europe. Growing to 90 cm (35 in), this is a multi-branched annual with divided ferny leaves, and flattish panicles of pure white flowers over a long period in summer. It is a recipient of the Royal Horticultural Society's Award of Garden Merit. It prefers a sunny, well-drained position. It grows to around 0.5-1 metres tall and 0.1-0.5 metres wide, carrying deciduous foliage. Grow it in full sun and most soil types. It tolerates soil of any pH, well-drained conditions and south-facing aspects.

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

Orlaya grandiflora

Petroselinum crispum 'Petronella' PBR is a bushy cultivar of the Petroselinum genus, known for its aromatic biennial plants with wide, pinnate foliage. This semi-evergreen herb thrives in full sun or partial shade and is suitable for east, south, or west-facing aspects, tolerating both exposed and sheltered conditions. It prefers fertile, moist but well-drained loam or sandy soils across a range of pH levels. Hardy to UK zone H6, it is ideal for city and courtyard gardens, cottage or informal gardens, and patio containers. Propagation is by seed sown in situ from late spring through summer, with interest during spring and summer.

Petroselinum crispum 'Petronella' PBR is a semi-evergreen, aromatic herb with wide foliage, ideal for city gardens and patios, flowering in spring and summer.

Petroselinum crispum 'Petronella'PBR

Peucedanum alsaticum is a species within the genus Peucedanum and the carrot family, Apiaceae. It belongs to the group of umbellifers that produce characteristic flowering heads. Flowering in the UK occurs from June to August. Identification relies on botanical characters used within the Peucedanum group rather than casual garden names.

Peucedanum alsaticum is a species in the Apiaceae that flowers in the UK from June to August.

Peucedanum alsaticum

Peucedanum alsaticum | Peucedanum (Apiaceae)

Peucedanum aromaticum is a herbaceous perennial cultivar of the Peucedanum genus, which includes mainly herbaceous perennials and some shrubs. It features compound pinnate leaves and produces umbels of flowers, typically in white or yellow. This cultivar thrives in full sun on a south-facing, sheltered aspect with well-drained, neutral loam soil. Suitable for borders and woodland gardens, it is hardy to UK zone H4 and is best grown in fertile, well-drained soil in sun or part shade. Interest is primarily in spring and summer, with propagation by seed or division.

Peucedanum aromaticum is a hardy herbaceous perennial with pinnate leaves and white or yellow umbels, perfect for borders and woodland gardens in spring and

Peucedanum aromaticum

Peucedanum ostruthium, commonly known as masterwort, is a herbaceous perennial belonging to the Apiaceae family. This plant features compound pinnate leaves and produces umbels of flowers, typically white or yellow, in spring and summer. It thrives in well-drained, neutral loam soil with full sun exposure, ideally in a south-facing and sheltered position. Suitable for borders and woodland gardens, Peucedanum ostruthium is hardy to UK zone H4 and can be propagated by seed or division.

Masterwort (Peucedanum ostruthium) is a hardy herbaceous perennial with white or yellow umbels, perfect for borders and woodland gardens in full sun.

Peucedanum ostruthium

Peucedanum rablense is a species of the carrot family, Apiaceae, placed within the variable genus Peucedanum. Members of this genus are often separated by small but distinctive fruit characters such as dorsally compressed mericarps and rib patterns. In the UK it flowers from June to August. Recent genomic work has driven taxonomic reshuffling across the genus, so names and circumscriptions are under review.

Peucedanum rablense is a member of the Apiaceae and flowers in the UK from June to August.

Peucedanum rablense

Peucedanum rablense | Apiaceae umbellifer

Peucedanum verticillare

Pimpinella major 'Rosea'

Pimpinella rubra is a bushy annual or biennial cultivar within the Pimpinella genus, known for its simple or pinnately divided foliage and branched clusters of small flowers. This deciduous plant thrives in full sun and suits south- or west-facing aspects, tolerating both exposed and sheltered conditions. It prefers fertile, moist but well-drained soils of various types and pH levels. Hardy to UK zone H3, it is ideal for patio and container planting. Propagation is best by seed sown in situ after frost risk has passed, as the plant dislikes root disturbance. Its season of interest spans summer and autumn.

Pimpinella rubra is a bushy annual or biennial with pinnate foliage and small flower clusters, perfect for sunny patios and containers in summer and autumn.

Pimpinella rubra

Ptilimnium capillaceum, known by the common name of herbwilliam, is a member of the carrot family, Apiaceae. It is a perennial herb, native to the eastern United States, from Texas to Massachusetts.

Mock bishop's weed (Ptilimnium capillaceum) is a hardy perennial ground cover, flowering in spring and summer, ideal for full sun UK gardens.

Ptilimnium capillaceum

Sanicula epipactis 'Harry Foley' is a clump-forming perennial herbaceous cultivar within the Sanicula genus, known for thriving in woodland environments. It features deciduous, lobed, glossy green leaves and produces small pinkish flowers in compact umbels during spring and summer. This cultivar prefers partial shade and moist but well-drained loam soil with a neutral pH. Suitable for woodland groundcover and wildlife gardens, 'Harry Foley' is hardy to UK zone H7 and can be propagated by seed in autumn or division in spring.

Sanicula epipactis 'Harry Foley' is a hardy H7 woodland groundcover with glossy green leaves and small pinkish flowers, flowering in spring and summer.

Sanicula epipactis 'Harry Foley' (v)

Sanicula marilandica is a clump-forming perennial herb from the Apiaceae family, suited to woodland environments. It typically grows to around 60 cm tall with lobed, glossy green deciduous leaves. In spring and summer, it produces small pinkish flowers in compact umbels, followed by bristly fruits that aid seed dispersal. This cultivar thrives in partial shade with moist but well-drained loam soil, tolerating a range of exposures and aspects. It is hardy to UK zone H7 and is ideal for woodland groundcover, wildflower meadows, and wildlife gardens.

Sanicula marilandica is a hardy H7 perennial with glossy leaves, ideal as woodland groundcover and for wildlife gardens in partial shade.

Sanicula marilandica

Seseli is a genus of herbaceous perennials within the Apiaceae family, known for their rigid grey-green leaves and compact clusters of white umbels on erect stems. These plants form clumps with a tufted, columnar upright habit and develop a woody base with a conical tap root. Suited to full sun and sheltered positions, they thrive in fertile, well-drained alkaline or neutral soils such as chalk, loam, or sand. Hardy to UK zone H7, Seseli is ideal for cottage and informal gardens, gravel gardens, flower borders, and as cut flowers, with interest in spring and summer.

Seseli is a hardy herbaceous perennial with rigid grey-green leaves and white umbels, ideal for full sun cottage gardens and cut flowers from spring to summer.

Seseli

Seseli arenarium is a species in the genus Seseli, placed in the Apiaceae (carrot) family. It flowers from July to September. Available references treat it as a distinct taxon within Seseli and list its flowering season as mid to late summer. Consult specialist literature or suppliers for detailed cultivation notes before adding it to a collection.

Seseli arenarium is a species in the Apiaceae that flowers from July to September.

Seseli arenarium

Seseli arenarium | Apiaceae, flowers Jul–Sep

Seseli elatum osseum is a herbaceous perennial in the carrot family Apiaceae, notable for its compound umbels of white or yellow flowers. Leaves are 1–3-pinnate to pinnately decompound, reflecting the finely divided foliage typical of the genus. Plants in this group can be woody at the base and often develop a conic taproot. Flowering occurs July to September.

Seseli elatum osseum produces compound umbels of white or yellow flowers and blooms from July to September.

Seseli elatum osseum

Seseli elatum osseum | Apiaceae umbel perennial

Seseli elatum subsp. osseum is a herbaceous perennial in the Apiaceae that produces compound umbels with white or yellow petals. Leaves are pinnately divided, the blades 1–3-pinnate, and the plant can develop a woody base with a conic taproot. Flowering occurs from July to September in the UK, followed by ovoid to ellipsoid fruits.

Seseli elatum subsp. osseum is a perennial Apiaceae with compound umbels and white or yellow petals, flowering July to September in the UK.

Seseli elatum subsp. osseum

Seseli elatum subsp. osseum | Apiaceae umbellifer

Seseli libanotis

Seseli montanum subsp. montanum is a cultivar within the Seseli genus, which includes herbaceous perennials with a woody base and conical tap root. This clump-forming, tufted plant has a columnar upright habit and deciduous, rigid grey-green leaves arranged on erect stems. It produces compact clusters of white umbels in spring and summer. Suited to full sun in sheltered, south- or west-facing positions, it thrives in fertile, well-drained alkaline or neutral soils such as chalk, loam, or sand. This hardy plant is ideal for cottage and informal gardens, gravel gardens, flower borders, and cut flowers.

Seseli montanum subsp. montanum is a hardy, clump-forming perennial with grey-green foliage, ideal for sunny cottage gardens and cut flower borders in spring

Seseli montanum subsp. montanum

Seseli pallasii is a member of the Apiaceae genus Seseli, producing compound umbels of small white or yellow flowers. Plants in this genus are herbaceous perennials that can develop a woody base and a conical taproot, with pinnate leaf blades. Flowering in the UK occurs from July to September, concentrating the display in mid to late summer.

Seseli pallasii produces compound umbels of white or yellow flowers and blooms in the UK from July to September.

Seseli pallasii

Seseli pallasii | Summer umbels (Apiaceae)

Seseli rigidum is a deciduous cultivar of the Seseli genus, which includes herbaceous perennials with woody bases and conical tap roots. This clump-forming, tufted plant grows upright in a columnar habit, featuring rigid, grey-green leaves on erect stems. It produces compact clusters of white umbels in spring and summer, thriving best in full sun with a south- or west-facing aspect. Suited to fertile, well-drained chalk, loam, or sandy soils with neutral to alkaline pH, it is hardy in the UK (H7) and ideal for cottage gardens, gravel gardens, flower borders, and cut flowers.

Seseli rigidum is a hardy, deciduous perennial with rigid grey-green leaves, ideal for full sun in cottage gardens, gravel beds, and cut flower displays.

Seseli rigidum

Smyrnium connatum is a clump-forming cultivar of the Smyrnium genus, which comprises upright, branching biennials with broad, lobed lower leaves and rounded upper foliage. This deciduous plant produces branched umbels of small, greenish-yellow flowers in late spring and early summer. It thrives in fertile, well-drained soils of various types, including chalk, clay, loam, and sand, and prefers full sun to partial shade in sheltered, south-, west-, or east-facing aspects. Hardy to UK zone H6, it is suitable for coastal, cottage, wildlife gardens, and flower borders.

Smyrnium connatum is a hardy, clump-forming biennial with greenish-yellow umbels, ideal for coastal and wildlife gardens in spring and summer.

Smyrnium connatum

Sphenosciadium capitellatum is a tufted evergreen plant from the Apiaceae family. It thrives in full sun on a south-facing, sheltered aspect, preferring moist but well-drained neutral loam soil. Hardy to UK zone H4, it is suitable for architectural features, patio and container planting, as well as flower borders and beds. This cultivar is best planted in well-drained soil and requires watering during establishment. It is of interest in spring and summer, with propagation achieved by sowing spores as soon as they are ripe.

Sphenosciadium capitellatum is a hardy evergreen with architectural appeal, thriving in full sun and ideal for patios, borders, and beds in spring and summer.

Sphenosciadium capitellatum

Stilbocarpa polaris is a deciduous, columnar upright plant belonging to the Apiaceae family. It thrives in full sun on a south-facing, sheltered aspect, preferring moist but well-drained loam soil with a neutral pH. Hardy to UK zone H3, it is suitable for a variety of garden settings including city and courtyard gardens, coastal areas, cottage and informal gardens, wildlife gardens, as well as hedging and screens. Interest is mainly in spring and summer, and cultivation involves planting in well-drained soil with watering during establishment. Propagation can be achieved through softwood cuttings, budding, or grafting.

Stilbocarpa polaris thrives in full sun, is hardy to RHS H3, and perfect for coastal, wildlife, and courtyard gardens with spring to summer interest.

Stilbocarpa polaris

Taenidia integerrima, commonly known as yellow pimpernel, is a bushy deciduous plant in the Apiaceae family. It thrives in full sun on a south-facing, sheltered aspect with fertile, moist but well-drained loam soil of neutral pH. Hardy to UK zone H4, it is suitable for cottage and informal gardens as well as flower borders and beds. This cultivar is of interest in spring and summer and can be propagated by seed or division.

Yellow pimpernel (Taenidia integerrima) thrives in full sun, is hardy to RHS H4, and blooms in spring and summer for borders and cottage gardens.

Taenidia integerrima

Thapsia, commonly known as deadly carrot, is a perennial plant in the Apiaceae family. It features pinnate foliage and thrives best in full sun, ideally in a south-facing, sheltered position. This cultivar prefers fertile, well-drained loam soil with a neutral pH. Hardy to UK zone H4, it is suitable for ornamental use and is most notable during spring and summer. Propagation is typically by seed.

Thapsia, or deadly carrot, is a hardy perennial with pinnate foliage, ideal for full sun and fertile soil, offering ornamental interest in spring and summer.

Thapsia

Thapsis garganica is a species of the genus Thapsia in the carrot family, Apiaceae. It flowers in the UK from July to September. The species is of interest to botanists and specialist gardeners who focus on members of Apiaceae. Accurate identification relies on examination of the plant's reproductive structures and flowering period.

Thapsis garganica is a species in the genus Thapsia (Apiaceae) that flowers from July to September.

Thapsis garganica

Thapsis garganica | Thapsia (Apiaceae) Plant Guide

Thapsis villosa 2 forms is a species in the Apiaceae genus Thapsia and is notable for its summer flowering. It reliably blooms from July to September, a clear window for judging each form’s display. The suffix '2 forms' denotes that two distinct forms are recorded under this name and should be treated and observed separately. Gardeners will find the flowering period the most useful trait when planning seasonal interest.

Thapsis villosa 2 forms flowers from July to September and belongs to the Apiaceae family.

Thapsis villosa 2 forms

Thapsis villosa 2 forms | Apiaceae summer flowers

Torilis arvensis, commonly known as spreading hedge parsley, is an erect and spreading plant within the Apiaceae family. It features feathery, pinnate leaves and thrives in full sun or partial shade, favouring south- or west-facing, sheltered aspects. This cultivar grows well in fertile, well-drained loam or sandy soils with a neutral pH, tolerating dry to moist conditions. Hardy to UK zone H3, it is suitable for wildlife gardens and naturalistic planting schemes, with interest in spring and summer. Propagation is achieved by seed or division.

Spreading hedge parsley (Torilis arvensis) thrives in full sun to partial shade, ideal for wildlife gardens and naturalistic planting from spring to summer.

Torilis arvensis

Torilis arvensis subsp. arvensis is a cultivar of the Torilis genus, belonging to the Apiaceae family. It is an erect, spreading plant with feathery, pinnate leaves. Suitable for full sun or partial shade, it thrives in sheltered, south- or west-facing aspects. This cultivar prefers fertile, well-drained loam or sandy soils with a neutral pH and can tolerate both dry and moist conditions. Hardy to UK zone H3, it is best used in wildlife gardens and naturalistic planting schemes, with interest during spring and summer. Propagation is by seed or division.

Torilis arvensis subsp. arvensis thrives in full sun or partial shade, ideal for wildlife gardens and naturalistic planting from spring to summer, hardy to RHS

Torilis arvensis subsp. arvensis

Torilis nodosa, commonly known as knotted hedge parsley, is an erect and spreading plant within the Apiaceae family. It features feathery, pinnate leaves and thrives in full sun or partial shade, favouring south- or west-facing, sheltered aspects. Well-suited to loam or sandy soils with a neutral pH, it prefers dry to moist but well-drained conditions. Hardy to UK zone H3, it is ideal for wildlife gardens and naturalistic planting schemes, offering interest in spring and summer. Cultivation involves planting in well-drained soil with watering during establishment, and propagation is by seed or division.

Torilis nodosa (knotted hedge parsley) thrives in full sun or partial shade, ideal for wildlife gardens and naturalistic planting from spring to summer.

Torilis nodosa

Trachymene coerulea mixed coloured flowers is a bushy annual or biennial cultivar of the Trachymene genus, which includes plants with terminal clusters of tiny, star-like flowers in shades of white, pink, or blue. This deciduous plant thrives in full sun on well-drained, neutral loam soil and prefers a sheltered south- or west-facing aspect. Suitable for city and courtyard gardens, patios, containers, and wildlife-friendly borders, it flowers in summer and autumn. Propagation is by slow-germinating seed sown under glass in mid spring or directly in late spring.

Trachymene coerulea mixed coloured flowers is a bushy annual or biennial with star-like white, pink, or blue flowers, ideal for sunny patios and wildlife

Trachymene coerulea mixed coloured flowers

Trachymene coerulea white-flowered is a bushy, deciduous cultivar of the Trachymene genus, known for its terminal clusters of tiny, star-like flowers. This cultivar features white flowers and thrives in full sun, ideally in a south- or west-facing, sheltered position with well-drained, neutral loam soil. It is hardy to UK zone H2 and is suitable for a variety of garden settings including city and courtyard gardens, cottage and informal gardens, patios, containers, wildlife gardens, and flower borders. It flowers in summer and autumn and prefers fertile, moist soil for cultivation.

Trachymene coerulea white-flowered is a bushy, deciduous plant with white star-like flowers, perfect for full sun and summer to autumn interest.

Trachymene coerulea white-flowered

Trachyspermum ammi, commonly called Ajowan, is a climbing member of the Apiaceae with evergreen foliage. It favours full sun or partial shade on well-drained loam or sandy soils and tolerates acid to alkaline pH. Best placed in sheltered, south-, west- or east-facing positions, it carries a UK hardiness rating of H4 (average hardy). Flowering occurs from July to September.

Trachyspermum ammi (ajowan) is a climbing, evergreen plant for sunny, sheltered sites in well-drained loam or sand, flowering July to September.

Ajwain or ajowan —also known as ajowan caraway, thymol seeds, bishop's weed, or carom—is an annual herb in the family Apiaceae. Both the leaves and the seed‑like fruit of the plant are consumed by humans.

Trachyspermum ammi

Ajowan (Trachyspermum ammi) | Sheltered Sun Sites

Zizea aurea is a flowering member of the parsley family Apiaceae, commonly traded as Golden Alexanders. Its principal display occurs from May to July. The common name signals the warm, golden appearance associated with the flowers. It sits in the genus Zizia and is used to provide a late-spring to midsummer floral presence.

Golden Alexanders (Zizea aurea) flowers from May to July, providing a concentrated late-spring to early-summer display in the garden.

Zizea aurea

Golden Alexanders (Zizea aurea) | Meadow Apiaceae

Zizia aurea (golden alexanders, golden zizia) is a flowering herbaceous perennial plant of the carrot family Apiaceae. It is native to eastern Canada and the United States, from the eastern Great Plains to the Atlantic Coast. The genus is named for Johann Baptist Ziz, a German botanist. The common name is based on the similarity to alexanders (Smyrnium olusatrum), another member of the carrot family from coastal areas in Europe and Northern Africa. It grows to around 0.5-1 metres tall and 0.1-0.5 metres wide, carrying deciduous foliage. Grow it in full sun and partial shade and most soil types. It tolerates soil of any pH, moist but well-drained conditions and east-facing, south-facing and west-facing aspects.

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