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 is a genus of flowering plant in the carrot family, Apiaceae. Peucedanum boasts a global presence with diverse spread of morphological features.

Peucedanum rablense

Peucedanum verticillare, known as giant hog fennel or milky parsley, is a clump-forming, herbaceous perennial in the Apiaceae family. It grows with a columnar upright habit, reaching 1.5 to 2.5 metres in height and spreading 0.5 to 1 metre. This deciduous plant thrives in full sun or partial shade and prefers sheltered positions with moist but well-drained or well-drained soils, including chalk, clay, loam, and sand. It favours a range of soil pH from acid to alkaline and is typically of interest during the summer season.

Giant hog fennel (Peucedanum verticillare) is a tall herbaceous perennial with a columnar habit, flowering in summer and thriving in full sun or partial shade.

Peucedanum verticillare

Giant hog fennel | Peucedanum verticillare

Pimpinella major, common name greater burnet-saxifrage or hollowstem burnet saxifrage, is a herbaceous perennial plant in the genus Pimpinella belonging to the carrot family (Apiaceae).

Pink greater burnet saxifrage (Pimpinella major 'Rosea') is a herbaceous perennial flowering in summer, thriving in full sun or partial shade.

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

Pimpinella is a plant genus in the family Apiaceae; it includes the aromatic herb anise.

Pimpinella major 'Rosea'

Pink greater burnet saxifrage | 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

Mock bishop's weed | 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 epipactis 'Harry Foley'

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

Selinum tenuifolium is a species in the Apiaceae placed within the genus Selinum. Its specific epithet, tenuifolium, literally means 'thin‑leaved', a name that points to narrow or finely divided leaflets. Flowering in the UK occurs from June to August. The plant's taxonomic placement within Apiaceae is the clearest starting point for identification and further research.

Selinum tenuifolium is a member of the Apiaceae and flowers in the UK from June to August.

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

Ligusticopsis is a genus of flowering plants belonging to the family Apiaceae.

Selinum tenuifolium

Selinum wallichianum is a flowering member of the Apiaceae noted for producing large umbels of many tiny white flowers from July to September. It is cultivated under the name Selinum wallichianum while placed botanically in the genus Ligusticopsis. The flowers form a broad, cloud-like display above finely divided basal leaves. The plant is grown as a garden ornamental for its mid- to late-summer blooms.

Selinum wallichianum produces clouds of tiny white flowers from July to September and is grown as a garden ornamental.

Selinum wallichianum

Wallich Milk Parsley | Selinum wallichianum

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 is a genus of herbaceous perennial plants in the family Apiaceae. They are sometimes woody at base with a conic taproot.

Seseli arenarium

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 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 libanotis, commonly known as moon carrot or mountain spignel, is a herbaceous perennial in the Apiaceae family. It has a columnar upright habit and evergreen foliage, growing to between 0.5 and 1 metre in height with a spread of 0.1 to 0.5 metres. This plant thrives in full sun on south- or west-facing, sheltered sites with chalk, loam, or sandy soils that are moist but well-drained and have an alkaline to neutral pH. It reaches full height within 1 to 2 years and is of interest during spring and summer.

Moon carrot (Seseli libanotis) is an evergreen herbaceous perennial with a columnar habit, flowering in spring and summer, ideal for full sun spots.

Seseli libanotis

Moon carrot | Seseli libanotis

Seseli montanum subsp. montanum is a clump-forming member of the Apiaceae with a columnar, tufted habit and a variable life-cycle (annual, biennial or herbaceous perennial). The foliage is deciduous and plants produce flowers in the UK from July to September. It favours full sun on well-drained chalk, loam or sandy soils with neutral to alkaline pH and prefers a south- or west-facing, sheltered spot. Suited to gravel gardens, informal and cottage borders, and as a source of cut flowers.

Seseli montanum subsp. montanum is a clump-forming Apiaceae that flowers July to September and prefers full sun on well-drained neutral to alkaline soils.

Seseli montanum subsp. montanum

Seseli montanum subsp. montanum | Upright umbellifer

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 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

Smyrnium perfoliatum is a herbaceous perennial in the Apiaceae that reaches about 1.5 m and provides a tall summer presence. It flowers from May to July. Native to parts of Europe, North Africa, Turkey and the Caucasus, it suits open, sunny positions. It prefers full sun in moist but well-drained soils such as sandy, loamy or clay and is fully hardy in the UK (H7).

Perfoliate Alexanders (Smyrnium perfoliatum) is a 1.5 m herbaceous perennial that flowers May to July and prefers full sun with moist, well-drained soil.

Smyrnium is a genus of flowering plants in the family Apiaceae that naturally grows in a range stretching from Southern Europe to South Asia.

Smyrnium perfoliatum

Perfoliate alexanders | Smyrnium perfoliatum

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

Yellow pimpernel | 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

Deadly carrot | 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 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

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

Spreading hedge parsley | 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

Knotted hedge parsley | 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

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.

Zizia is a genus of flowering plants in the parsley family, Apiaceae. It was named after Johann Baptist Ziz (1779–1829), a German botanist from the Rhineland.

Zizea aurea

Golden Alexanders | Zizea aurea

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.

Golden Alexanders (Zizia aurea) is a hardy herbaceous perennial flowering in spring and summer, ideal for wildlife and cottage gardens in full sun or partial