Iris unguicularis 'Walter Butt' is a clump-forming, upright perennial in the iris family, notable for its fragrant pale lilac to purple flowers. Plants reach about 0.3 metres and carry sword-shaped to grassy, often glaucous leaves that may be deciduous or evergreen. In the UK it flowers from May to July. The plant is harmful if eaten, so wear gloves and other protective equipment when handling.

Algerian iris 'Walter Butt' (Iris unguicularis 'Walter Butt') is a clump-forming perennial to 0.3 m with fragrant purple flowers in the UK from May to.

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

Irises are instantly recognisable for the three upright standards and three falling falls that give every flower its poised, sculptural symmetry. The genus is vast and unusually adaptable, spanning rhizomatous bearded forms that bask on dry sunny banks, beardless Siberian and Japanese kinds that prefer ground that never dries out, and small bulbous species that flower in the thin light of late winter. Sword-shaped or grassy leaves remain handsome long after the blooms fade, and the colour range runs from near-black through every blue and gold.

Iris unguicularis 'Walter Butt'

Algerian iris 'Walter Butt' | Iris unguicularis 'Walter Butt'

Iris unguicularis, the Algerian iris, is a rhizomatous flowering plant in the genus Iris, native to Algeria, Greece, Turkey, Western Syria, and Tunisia. It grows to 30 centimetres (12 in), with grassy evergreen leaves, producing pale lilac or purple flowers with a central band of yellow on the falls.

Iris unguicularis Sparta form is a hardy evergreen Algerian iris flowering pale lilac in spring, autumn and winter, ideal for patios and city gardens.

Iris unguicularis Sparta form

Iris unguicularis subsp. carica var. angustifolia is a herbaceous perennial cultivar within the Iris genus, known for its upright habit and blue-green foliage. Like other irises, it produces flowers with three broad fall petals and three smaller upright standard petals, typically blooming in spring and summer. This cultivar thrives in full sun on south-facing, sheltered sites with well-drained, sandy, neutral soil. It is hardy in the UK (H7) and is suitable for border planting or as an architectural plant, requiring watering during dry spells while avoiding waterlogging.

Iris unguicularis subsp. carica var. angustifolia is a hardy herbaceous perennial with blue-green foliage, ideal for borders and architectural planting in full

Iris unguicularis subsp. carica var. angustifolia

Iris unguicularis var. speciosa Dykes, 'Ellis' Variety' is a clump-forming, upright perennial in the Iridaceae that typically reaches around 0.3 metres. It bears sword-shaped to grassy leaves that are often glaucous and may be deciduous or evergreen. Suited to full sun or some partial shade, it prefers neutral to slightly alkaline, sharply drained soils such as loam, chalk or sand. In the UK it flowers from May to July.

Algerian Iris is a clump-forming perennial to 0.3m that flowers May to July and prefers neutral to slightly alkaline, well-drained soil.

Iris unguicularis var. speciosa Dykes, 'Ellis' Variety'

Algerian Iris | Iris unguicularis var. speciosa Dykes, 'Ellis' Variety'

Iris uniflora is a species in the genus Iris and in the subgenus Limniris. It is a rhizomatous perennial, from Russia, Mongolia, China and Korea. It has thin grass-like leaves and stems, and purple, blue-purple or violet flowers. It is cultivated as an ornamental plant in temperate regions. In the wild it grows across Amur, Buryatiya, Chita, Inner Mongolia, Khabarovsk and other regions. Grow it in full sun and sandy soil. In UK gardens it is fully hardy throughout the UK (RHS H7). It works well for border planting and architectural plant. It tolerates neutral soils, dry conditions and south-facing aspects. Grow in well-drained, fertile soil in full sun. Plant rhizomes shallowly with the top exposed to the sun. Water during dry spells but avoid waterlogging.

Iris uniflora, a member of the Iridaceae family, showcases the distinctive features of the Iris genus, which includes elegant blooms supported by slender leaves and upright stems. This species is known for its unique single flower per stem, adding a touch of individuality to any plant collection.

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

Iris uniflora

Iris variegata, commonly known as the Hungarian iris, is a plant species in the genus Iris, also in the subgenus Iris. It is a rhizomatous perennial from eastern Europe.

Iris variegata var. pontica is a hardy perennial ideal for full sun, perfect for borders, patios, and cut flowers in spring and summer gardens.

Iris variegata var. pontica

Iris variegata var. reginae is a clump-forming deciduous perennial belonging to the Iris genus, known for its slender leaves and upright stems bearing distinctive flowers with three broad fall petals and three smaller upright standards. This cultivar thrives in well-drained, fertile loam soil with a neutral pH, ideally in full sun and a sheltered position facing south, east, or west. It is hardy to UK zone H6 and is suitable for city gardens, patios, and flower borders. Best planted shallowly with rhizomes exposed, it flowers in spring and summer and benefits from watering during dry spells while avoiding waterlogging.

Iris variegata var. reginae is a hardy deciduous perennial with distinctive spring and summer flowers, ideal for city gardens, borders, and cut flowers.

Iris variegata var. reginae

Iris variegata var. reginae 'Bozhimir Davidov' is a herbaceous perennial cultivar of the Iris genus, known for its upright habit and blue-green foliage. Like other irises, it produces flowers with three broad fall petals and three smaller upright standard petals, typically blooming in spring and summer. This cultivar thrives in full sun on south-facing, sheltered sites with sandy, neutral, and dry soil. It is hardy in the UK (H7) and is well suited for border planting or as an architectural plant. Cultivation requires well-drained, fertile soil with shallow planting of rhizomes, avoiding waterlogging.

Iris variegata var. reginae 'Bozhimir Davidov' is a hardy herbaceous perennial with blue-green foliage and striking spring to summer flowers, ideal for borders

Iris variegata var. reginae 'Bozhimir Davidov'

Iris vartanii is a herbaceous perennial in the Iridaceae that forms clumps and carries its flowers from May to July. The foliage is deciduous and the plant suits a sheltered, south-, east- or west-facing position. It prefers full sun in a well-drained neutral loam. Native to Lebanon-Syria and Palestine, it carries an H6 rating, meaning it is very hardy in UK conditions.

Iris vartanii is a clump-forming herbaceous perennial flowering in the UK from May to July, suited to full sun on well-drained neutral loam.

Iris vartanii

Vartanni Iris | Iris vartanii

Iris ventricosa is a herbaceous perennial cultivar of the Iris genus, known for its upright habit and blue-green foliage. As a member of the Iridaceae family, it thrives in full sun on a south-facing, sheltered aspect with sandy, neutral, and dry soil. This cultivar is hardy to UK zone H7 and is best grown in well-drained, fertile soil where rhizomes are planted shallowly with their tops exposed. It flowers in spring and summer, making it suitable for border planting and as an architectural plant. Propagation is by division or seed.

Iris ventricosa is a hardy herbaceous perennial ideal for full sun, perfect for border planting and architectural interest in spring and summer.

Iris ventricosa

Iris versicolor or Iris versicolour is also commonly known as the blue flag, harlequin blueflag, larger blue flag, northern blue flag, and poison flag, plus other variations of these names, and in Great Britain and Ireland as purple iris. It is a species of Iris native to North America, in Eastern Canada and the Eastern United States. It is common in sedge meadows, marshes, and along streambanks and shores. It is one of the three Iris species in the Iris flower data set outlined by Ronald Fisher in his 1936 paper "The use of multiple measurements in taxonomic problems" as an example of linear discriminant analysis. 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 acid and neutral soils, poorly-drained conditions and south-facing and west-facing aspects.

Iris versicolor, or blue flag, is a hardy aquatic perennial ideal for full sun in borders, flowering from spring to winter in UK gardens.

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

Iris versicolor

Blue flag | Iris versicolor

Iris versicolor or Iris versicolour is also commonly known as the blue flag, harlequin blueflag, larger blue flag, northern blue flag, and poison flag, plus other variations of these names, and in Great Britain and Ireland as purple iris.

Iris versicolor 'Party Line' is a hardy H6 purple iris ideal for full sun, perfect for borders, containers, and cut flowers in spring and summer.

Iris versicolor 'Party Line'

Iris versicolor 'Rowden Cantata' is a herbaceous perennial cultivar of the Iris genus, known for its upright habit and blue-green foliage. Like other irises, it produces flowers with three broad fall petals and three smaller upright standard petals, typically blooming in spring and summer. This cultivar thrives in full sun on south-facing, sheltered sites with well-drained, sandy, neutral soil and dry conditions. Hardy to UK zone H7, it is suitable for border planting and as an architectural plant, and is best propagated by division or seed.

Iris 'Rowden Cantata' is a hardy herbaceous perennial with blue-green foliage and striking spring to summer flowers, ideal for borders and architectural

Iris versicolor 'Rowden Cantata'

Iris 'Rowden Cantata' | Iris versicolor 'Rowden Cantata'

Iris versicolor 'Rowden Madrigal' is a clump-forming cultivar of the Iris genus, known for its slender leaves and upright stems bearing distinctive flowers with three broad fall petals and three smaller upright standards. This deciduous perennial thrives in full sun and prefers well-drained, neutral loam soil, ideally in sheltered, south-, east-, or west-facing aspects. Hardy to UK zone H6, it is suitable for city gardens, patios, and flower borders, offering seasonal interest in spring and summer. Cultivation involves shallow planting of rhizomes with the top exposed and propagation by division.

Iris 'Rowden Madrigal' is a hardy H6 cultivar with slender leaves and distinctive flowers, ideal for borders, containers, and cut flowers in full sun.

Iris versicolor 'Rowden Madrigal'

Iris 'Rowden Madrigal' | Iris versicolor 'Rowden Madrigal'

Iris vicaria is a species in the genus Iris, it is also in the subgenus Scorpiris. It is a bulbous perennial from Asia, found in Tajikistan, Turkmenistan and Uzbekistan. It is native to Tadzhikistan, Turkmenistan and Uzbekistan. In the garden it prefers full sun and sandy soil. In UK gardens it is fully hardy throughout the UK (RHS H7). Suggested uses include border planting and architectural plant. It tolerates neutral soils, dry conditions and south-facing aspects. Grow in well-drained, fertile soil in full sun. Plant rhizomes shallowly with the top exposed to the sun. Water during dry spells but avoid waterlogging.

Iris vicaria belongs to the Iridaceae family and is part of the Iris genus, which includes both rhizomatous and bulbous perennial plants. This species showcases slender leaves and upright stems that bear flowers with three broad, spreading or drooping fall petals and three smaller, upright standard petals, typically blooming in late winter, spring, or early summer.

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

Iris vicaria

Iris virginica 'Pale Lavender' is a herbaceous perennial cultivar of the Iris genus, known for its upright habit and blue-green foliage. This plant produces flowers in spring and summer, featuring the characteristic iris structure with three broad fall petals and three smaller upright standard petals. It thrives best in full sun on a south-facing, sheltered aspect with well-drained, sandy, neutral soil that remains dry. Hardy to UK zone H7, it is suitable for border planting and as an architectural plant, and can be propagated by division or seed.

Iris virginica 'Pale Lavender' is a hardy herbaceous perennial with blue-green foliage and spring to summer flowers, ideal for borders and architectural

Iris virginica 'Pale Lavender'

Iris warleyensis is a species in the genus Iris, it is also in the subgenus Scorpiris. It is a bulbous perennial from Central Asia, Tajikistan, Turkmenistan and Uzbekistan. It has long arching mid-green leaves, thin stem and spring flowers in shades of blue. In the wild it grows across Tadzhikistan, Turkmenistan and Uzbekistan. Grow it in full sun and sandy soil. In UK gardens it is fully hardy throughout the UK (RHS H7). It works well for border planting and architectural plant. It tolerates neutral soils, dry conditions and south-facing aspects. Grow in well-drained, fertile soil in full sun. Plant rhizomes shallowly with the top exposed to the sun. Water during dry spells but avoid waterlogging.

Iris warleyensis, a member of the Iridaceae family, showcases the distinctive characteristics of the Iris genus, which includes both rhizomatous and bulbous perennials. This particular species features slender leaves and upright stems that bear flowers with three broad, drooping fall petals and three smaller, upright standard petals.

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

Iris warleyensis

Iris wattii is a plant species in the genus Iris, it is also in the subgenus Limniris and the section Lophiris (crested irises). It is a rhizomatous perennial plant. It is native to China, Burma and India, it has lavender or light blue flowers. It is also known as 'Bamboo Iris' (although confusingly, so is Iris confusa). Grow it in full sun and sandy soil. In UK gardens it is fully hardy throughout the UK (RHS H7). It works well for border planting and architectural plant. It tolerates neutral soils, dry conditions and south-facing aspects. Grow in well-drained, fertile soil in full sun. Plant rhizomes shallowly with the top exposed to the sun. Water during dry spells but avoid waterlogging.

Iris wattii belongs to the Iridaceae family and features the characteristic slender leaves and upright stems of the Iris genus. This species produces flowers with three broad, spreading fall petals and three smaller, upright standard petals, typically blooming in the spring.

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

Iris wattii

Iris willmottiana is a species in the genus Iris, in the subgenus Scorpiris. It is a bulbous perennial, from Uzbekistan in central Asia. It has green broad leaves, short stems, large flowers in various shades of blue. It is native to Kazakhstan and Kirgizstan. In the garden it prefers full sun and sandy soil. In UK gardens it is fully hardy throughout the UK (RHS H7). Suggested uses include border planting and architectural plant. It tolerates neutral soils, dry conditions and south-facing aspects. Grow in well-drained, fertile soil in full sun. Plant rhizomes shallowly with the top exposed to the sun. Water during dry spells but avoid waterlogging.

Iris willmottiana is a member of the Iridaceae family, known for its diverse species that showcase either rhizomatous or bulbous growth habits. This plant features slender leaves and tall stems, adorned with flowers that have three wide, spreading fall petals and three smaller, upright standard petals.

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

Iris willmottiana

Iris wilsonii is a clump-forming, upright perennial in the iris family, notable for its sword-shaped leaves that are often glaucous. It suits a sunny, south- or west-facing position and will tolerate some light shade. Flowering occurs from May to July. Take care when handling as the plant is harmful if eaten.

Wilson iris (Iris wilsonii) is a clump-forming perennial from western China that flowers May to July and suits a sunny, south- or west-facing spot.

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

Iris wilsonii

Wilson iris | Iris wilsonii

Iris winogradowii is a species of flowering plant in the genus Iris, classified in the subgenus Hermodactyloides and section Reticulatae. It is a bulbous perennial, from the Caucasus mountains of Azerbaijan and Georgia.

Iris winogradowii Reticulata is a hardy bulbous perennial flowering in spring and summer, ideal for city gardens, patios, and cut flowers in full sun.

Iris winogradowii Reticulata

Iris x robusta 'Dark Aura' is a clump-forming iris in the Iridaceae with sword-shaped foliage and an upright habit. It flowers in the UK from May to July. The plant prefers full sun on neutral loam in south-facing, sheltered sites. It is suited to borders, rock gardens and containers.

Iris x robusta 'Dark Aura' is a clump-forming Iris that flowers from May to July and suits south-facing, sheltered sites in neutral loam.

Iris x robusta 'Dark Aura'

Iris x robusta 'Purple Fan' is a clump-forming deciduous perennial cultivar of the Iris genus, known for its slender leaves and upright stems bearing distinctive flowers with broad fall petals and smaller upright standards. It thrives in well-drained, fertile loam soil with a neutral pH, ideally in full sun and a sheltered position facing south, east, or west. Hardy to UK zone H6, it is suitable for city gardens, patios, and flower borders, offering seasonal interest in spring and summer. Cultivation involves shallow planting of rhizomes with the top exposed, avoiding waterlogging, and propagation is by division of rhizomes.

Iris x robusta 'Purple Fan' thrives in full sun, hardy to RHS H6, ideal for city gardens, borders, containers, and cut flowers in spring and summer.

Iris x robusta 'Purple Fan'

Iris x sambucina, known as the elder-scented iris, is a herbaceous perennial belonging to the Iridaceae family. This upright cultivar features blue-green foliage and produces flowers in spring and summer, typical of the Iris genus which bears slender leaves and upright stems with distinctive three broad fall petals and three smaller standard petals. It thrives best in full sun on a south-facing, sheltered aspect with sandy, neutral, and dry soil. Suitable for border planting and architectural use, it requires well-drained, fertile soil with shallowly planted rhizomes and benefits from watering during dry spells while avoiding waterlogging.

Iris x sambucina, the elder-scented iris, is a hardy herbaceous perennial with blue-green foliage and spring to summer flowers, ideal for sunny borders.

Iris x sambucina

Elder-scented iris | Iris x sambucina

Iris x squalens, known as the brown-flowered iris, is a herbaceous perennial cultivar within the Iris genus. This upright plant features blue-green foliage and produces flowers in spring and summer. Like other irises, it has slender leaves and upright stems bearing distinctive flowers with three broad fall petals and three smaller standard petals. It thrives best in full sun on a south-facing, sheltered aspect with sandy, neutral, and dry soil. Suitable for border planting and architectural use, it is hardy in the UK (H7) and prefers well-drained, fertile soil with shallowly planted rhizomes.

Brown-flowered iris is a hardy herbaceous perennial with blue-green foliage, blooming spring to summer, ideal for borders and architectural planting in full

Iris x squalens

Brown-flowered iris | Iris x squalens

Iris xiphioides is a clump-forming, upright perennial in the iris family, noted for its sword-shaped, often glaucous leaves. It flowers from May to July. It prefers full sun and will tolerate some light shade, growing in neutral to slightly alkaline loam, chalk or sand with good drainage; bearded types favour sharply drained positions. Hardy from H5 to H7, it suits south- or west-facing exposures, whether exposed or sheltered.

Iris xiphioides is a clump-forming perennial with sword-shaped, often glaucous leaves that flowers from May to July.

Iris xiphioides

Iris xiphium is a clump-forming, upright perennial in the iris family with sword-shaped leaves that are often glaucous. It produces its flowers in the UK from May to July. Plants prefer a sunny, south- or west-facing position in neutral to slightly alkaline, sharply drained soils. Wear gloves when handling, as the plant is harmful if eaten.

Spanish Iris (Iris xiphium) is a clump-forming perennial with glaucous, sword-shaped leaves and May to July flowering in the UK.

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

Iris xiphium

Spanish iris | Iris xiphium

Iris zaprjagajevii (sometimes misspelled zaprjagajewii,) is a species in the genus Iris, it is also in the subgenus Scorpiris. It is a bulbous perennial from Central Asia. It has greyish-green leaves, short stem and white flowers with a yellow crest. In the wild it grows across Tadzhikistan. Grow it in full sun and sandy soil. In UK gardens it is fully hardy throughout the UK (RHS H7). It works well for border planting and architectural plant. It tolerates neutral soils, dry conditions and south-facing aspects. Grow in well-drained, fertile soil in full sun. Plant rhizomes shallowly with the top exposed to the sun. Water during dry spells but avoid waterlogging.

Iris zaprjagajewii is a member of the Iridaceae family, known for its elegant structure and unique blooms. This species showcases the classic features of the Iris genus, including slender leaves and upright stems, which support its distinctive flowers with prominent fall and standard petals.