Persicaria amp. 'Blackfield' is a cultivated member of the Persicaria genus in the knotweed family, Polygonaceae. As a Persicaria it produces the genus's characteristic flowering spikes and blooms in the UK from July to September. Plants in this genus are herbaceous, with stems and alternately arranged leaves, and may develop from taproots, fibrous roots, rhizomes or stolons. The inflorescences may be arranged as panicles, spikes or compact heads.

Persicaria amp. 'Blackfield' is a Persicaria cultivar that flowers in the UK from July to September and carries the genus's spiked inflorescences.

Persicaria is a genus of herbaceous flowering plants in the knotweed family, Polygonaceae. Plants of the genus are known commonly as knotweeds or smartweeds.

Persicaria amp. 'Blackfield'

Persicaria amp. 'Taurus' is a Persicaria in the knotweed family (Polygonaceae) noted for its summer flowering, which runs from July to September. As a member of the genus Persicaria it is herbaceous and shares the group’s range of root and stem habits, from taproots to rhizomes and stolons. Flowers are carried in spike- or panicle-like inflorescences typical of the genus. Expect a plant whose seasonal bloom period provides a clear summer presence in the border.

Persicaria amp. 'Taurus' is a Persicaria (Polygonaceae) that flowers from July to September.

Persicaria amp. 'Taurus

Knotweed | Persicaria amp. 'Taurus

Persicaria amplex. 'Alba' is a member of the Persicaria genus in the Polygonaceae (knotweed) family, valued for its summer display. As with other Persicaria, plants are herbaceous and may show a range of growth habits within the genus. Expect flowering from July to September.

Persicaria amplex. 'Alba' flowers from July to September and belongs to the Polygonaceae family.

Persicaria amplex. 'Alba'

Knotweed | Persicaria amplex. 'Alba'

Persicaria amplex. 'Blackfield' is a cultivar of Persicaria in the knotweed family Polygonaceae, notable for its summer flowering from July to September. It belongs to a genus of herbaceous plants that can be annual or perennial and shows a variety of stem and root habits. Flowers in Persicaria are carried in spikes, panicles or headlike clusters and may range in colour within the genus. The genus often bears a papery ochrea at the leaf nodes.

Persicaria amplex. 'Blackfield' is a Persicaria (Polygonaceae) cultivar that flowers from July to September and benefits from cutting back after flowering.

Persicaria amplex. 'Blackfield'

Knotweed | Persicaria amplex. 'Blackfield'

Persicaria amplex. 'Taurus' is a cultivated form of Persicaria in the knotweed family Polygonaceae, producing spikelike clusters of small flowers. Members of the genus carry flowers that can range from white and greenish through to pink, red and purple; this cultivar flowers in the UK from July to September. The group shows variable root and stem habits, so check the supplier for precise habit and spread.

Persicaria amplex. 'Taurus' is a Persicaria cultivar that produces spikelike flower clusters in the UK from July to September.

Persicaria amplex. 'Taurus'

Knotweed | Persicaria amplex. 'Taurus'

Persicaria polymorpha is a clump-forming, spreading cultivar of the Persicaria genus, known for its deciduous, lance-shaped leaves. It thrives in full sun or partial shade and is suitable for east, south, or west-facing aspects. This hardy plant (H7) can grow in a variety of soil types including chalk, clay, loam, and sand, with moisture levels ranging from moist to well-drained and pH from acid to alkaline. It is ideal for borders, ground cover, and damp areas, and can be propagated by division, basal cuttings, or self-seeding.

Persicaria polymorpha is a hardy, clump-forming perennial with lance-shaped leaves, ideal for borders, ground cover, and damp areas in full sun or partial

https://en.wikipedia.org/wiki/Koenigia_%C3%97_fennica

Koenigia is a genus of plants in the family Polygonaceae. The genus Aconogonon has been merged into Koenigia.

Persicaria polymorpha

Persicaria rucinata 'Needham's Form' is a cultivar of Persicaria in the knotweed family Polygonaceae. Persicaria comprises herbaceous species commonly referred to as knotweeds or smartweeds, with diverse stem and leaf forms. This cultivar produces flowers from July to September. Consult the supplier for specific notes on flower and foliage appearance.

Persicaria rucinata 'Needham's Form' is a Persicaria cultivar that flowers from July to September.