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Ugni 'Flambeau', Chilean Guava 'Flambeau'

Bushy compact, slow growing plant with variegated pink cream & green foliage. Tiny flowers followed by edible fruits. Chilean Guava berries look like blueberries and taste like wild strawberries

Ugni molinae 'Butterball', Chilean Guava 'Butterball'

Evergreen bushy habit. Slow growing. 'Butterball' has butter-yellow foliage that ages to glossy green, and small pink flowers that are followed by edible red berries in late summer. Chilean Guava berries look like blueberries and taste like wild strawberries

Ugni molinae 'Ka-Pow', Chilean Guava 'Ka-Pow'

Guava 'Ka-Pow! Is a new form bred in Cornwall by Steve Yandall. I first came across it when I visited his nursery a few years back. It has aromatic foliage and delicious berries in late summer. This variety was named by James Wong, he first saw it on my Twitter feed! Chilean Guava berries look like blueberries and taste like wild strawberries

Ulex Europaeus, Gorse

The common European gorse grows not only in Europe, but also in the Americas, New Zealand, South Africa, and Australia, and is often considered a weed, and can be a a seriously invasive species. The bushy, spiny shrubs grow to 2-3 mtrs. in height. The stems and leaves have modified to green spines. Yellow flowers, similar in form to pea flowers, can bloom at any time of the year, but most commonly in Spring. The shrub can live for many years.

Ulleung Island Rowan 'Olympic Flame', Sorbus ulleungensis 'Olympic Flame' syn. Sorbus commixta 'Olympic Flame', Sorbus dodong 'Olympic Flame', Sorbus 'Olympic Flame'

Rowan, or Mountain Ash, trees are a familiar sight in the British countryside, with their distinctive clusters of orangey-red berries in Autumn. The pinnate leaves are somewhat feathery, the bark is smooth, and the tree makes an attractive rounded shape.‘Olympic Flame' is a cultivar of the Ulleung Island Rowan Tree, which has amazing autumn foliage. It has lovely white flowers in late spring, and red berries in Autumn.

Ulmus 'Columella', Elm 'Columella'

Elms are deciduous or semi-deciduous trees. 'Columella' was bred because it is resistant to Dutch elm disease. It has a slender, fairly open, columnar crown, and leaves that emerge quite late, and are dark green, oval - narrower at the base, - 6 - 10 cm and scalloped.The foliage turns yellow in Autumn. The bark is silvery-grey and smooth, becoming dark grey with black grooves. Long-stalked bundles of light green flowers appear in early Spring, and are followed by flat winged brown nutlets that are round to elliptical. This tree is used mainly for lining roads and avenues, and in public spaces, such as parks

Ulmus glabra, Wych Elm

Elm trees are deciduous or semi deciduous trees. The Wych Elm is deciduous, with smooth, grey bark that becomes grey-brown and grooved after 20 years. The twigs are dark grey and are covered in coarse hairs, and leaf buds are hairy, and purple-black. The leaves are larger than other elms, at 7-16 cm long, and are toothed, and have a characteristic asymmetrical base and tapering to a sudden point at the top. Clusters of red-purple hermaphrodite flowers appear before the leaves in early Spring, spaced out along the twigs and small branches, and are followed by small, winged fruits known as samaras that are dispersed by the wind

Ulmus glabra 'Lutescens', Wych Elm 'Lutescens'

Elm trees are deciduous or semi deciduous trees. The Wych Elm is deciduous, with smooth, grey bark that becomes grey-brown and grooved after 20 years. The twigs are dark grey and are covered in coarse hairs, and leaf buds are hairy, and purple-black. The leaves are larger than other elms, at 7-16 cm long, and are toothed, and have a characteristic asymmetrical base and tapering to a sudden point at the top. Clusters of red-purple hermaphrodite flowers appear before the leaves in early Spring, spaced out along the twigs and small branches, and are followed by small, winged fruits known as samaras that are dispersed by the wind. The golden wych elm has gold coloured leaves in full sun (lime green in shade)

Ulmus parvifolia, Chinese Elm

Chinese elm is a deciduous or semi-deciduous tree, with mottled. flaky bark which is grey, orange, brown and green. It is an upright tree, with slightly weeping branches with dark green leathery leaves. In colder regions the leaves turn colour in Autumn to shades yellow, red and purple.

Ulmus parvifolia (Bonsai), Chinese Elm (Bonsai)

Bonsai is ancient tradition of the Japanese for growing miniature trees or shrubs in containers. They are literally just a miniature form of the real thing. They can be shaped and made to look older than their years. Although size, ph, light requirements and frost hardiness have been given here, each of these actually depends on the requirements of the type of tree or shrub grown.Chinese elm is a deciduous or semi-deciduous tree, with mottled. flaky bark which is grey, orange, brown and green. It is an upright tree, with slightly weeping branches with dark green leathery leaves. In colder regions the leaves turn colour in Autumn to shades yellow, red and purple.

Ulmus x hollandica 'Jacqueline Hillier' (Bonsai), Dutch Elm 'Jacqueline Hillier' (Bonsai)

Bonsai is ancient tradition of the Japanese for growing miniature trees or shrubs in containers. They are literally just a miniature form of the real thing. They can be shaped and made to look older than their years. Although size, ph, light requirements and frost hardiness have been given here, each of these actually depends on the requirements of the type of tree or shrub grown.:'Jacqueline Hillier' bears miniature leaves with deep pleated veins that appear in Spring, and turn to yellows and oranges in Autumn. After the leaves have dropped, silvery bark is revealed. Unpruned, in the ground, will reach 6'.

Umbrella Bamboo, Fargesia 'Robusta'

Fargesia robusta is typically upright and tall, and is more robust than many varieties. It has a tight, non-invasive clumping habit. The form 'Campbell' is particularly upright and robust in character - suited perfectly to screening and hedging.

Umbrella Bamboo, Fargesia 'murielae'

This Bamboo is ideal as an exotic looking hedge. It provides a great screen. Like all bamboo plants it is very fast growing. Fargesia murielae prefers a moist, normal soil and a sunny or slightly shaded site. As it is clump forming, prune it regularly to prevent it from spreading further than desired.

Umbrella Bamboo 'Asian Wonder', Fargesia 'Asian Wonder'

This Bamboo is ideal as an exotic looking hedge. It provides a great screen. Like all bamboo plants it is very fast growing. Fargesia prefers a moist, normal soil and a sunny or slightly shaded site. As it is clump forming, prune it regularly to prevent it from spreading further than desired.

Umbrella Bamboo 'Pingwu', Fargesia robusta 'Pingwu'

Decorative, non-invasive clump forming variety. A hardy bamboo that produces arching stems with narrow green leaves. This plant will in time form large clumps that do not spread aggressively.

Umbrella Bamboo 'Rufa', Fargesia 'Rufa'

This very hardy bamboohas an eventual height of around 3m so is ideal for smaller gardens or large pots. Its canes are clothed in attractive green leaves throughout the year. Eventually forming dense clumps, the new canes emerge a bright green, which contrast well with the culm sheaths, creating a distinctive two-tone effect until the sheaths drop away.

Umbrella Flower, Ceropegia hybrid 'Sandersonii'

Evergreen or Semi-Evergreen, climbing/trailing plant with unusual green parachute like flowers.

Umbrella Papyrus, Cyperus involucratus syn. Cyperus alternifolius

Umbrella Papyrus is a dwarf form of papyrus, growing to around 60 cms. It is an evergreen clump forming plant with upright stems that have a whorl of dark green bracts of grass-like leaves - like spokes of an umbrella - and rather insignificant yellow-green flowers stems It thrives as an aquatic marginal, or in a bog garden

Umbrella Tree, Schefflera fantsipanensis

Schefflera fantsipanensis is small evergreen tree or shrub up to 5m tall. It has oval palmate dark green leaves,and in Summer umbels of yellow flowers that are followed by blue-black fruit.

Umbrella Tree, Schefflera delavayi

Schefflera delavayi has leaves that are reminiscent of shiny large oak leaves that can grow up to 3' across. In Summer sprays of small white flowers appear, and are followeed by purple-black berries.

Umbrella tree, Schefflera taiwaniana

Schefflera taiwaniana is a large shrub with shiny dark green palmate leaves, the new growth being covered in short pale hairs.

Umbrella tree, Schefflera macrophylla

Schefflera macrophylla, which reaches heights of more than 8m in some Cornish gardens, flowers very late in the year when little else is, and the flowers are followed by black fruit. .

Umbrella Tree, Schefflera digitata

Schefflera digitata, or Umbrella tree, is a native of New Zealand. It is a spreading, small tree, with palmate leaves and umbels of greenish flowers that are followed by round, purple, fleshy fruits. It is often grown indoors as a container plant. In its native country it can grow to 8m.

Umbrella tree, Schefflera rhododendrifolia

Schefflera rhododendrifolia sports palmate foliage which is variably lobed on young plants, but entire as it matures. A large shrub or small tree of exotic appearance, requiring a sheltered position in gardens, away from the very coldest areas or a bright spot out of direct sunlight if grown as a houseplant.

Uncinia rubra, Red Hook Sedge

From New Zealand, this highly ornamental grass, U. rubra is a tufted, evergreen, perennial sedge to 30cm, with glossy reddish-green or red-brown leaves and dark brown to black flower spikes in summer

Uncinia rubra Colenso ex Boott syn. Uncinia rubra var. Fallax, Red Hook Sedge Grass

From New Zealand, this highly ornamental grass forms tussocks of deep reddish brown foliage all year round. Insignificant flowers eventually turn into hooked seeds. Ideal pot specimen

Uncinia rubra 'Everflame' syn. Uncinia rubra 'Belinda's Find', Red Hook Sedge 'Everflame'

From New Zealand, this highly ornamental grass forms tussocks of deep reddish brown foliage all year round. Insignificant flowers eventually turn into hooked seeds. Ideal pot specimen. 'Everflame' is a more colourful, dramatically variegated form: each leaf is bronze with vivid bright red margins which gleam in the sun.

Uncinia rubra 'Firedance', Red Hook Sedge Grass

'Firedance' sports young leaves that are a mix of dark red brown with flashes of red which enhances the fiery effect. Older leaves take have a green tone as they age. From New Zealand, this highly ornamental grass forms tussocks of foliage all year round. Insignificant flowers eventually turn into hooked seeds. Ideal pot specimen

Uñita, Turbinicarpus schmiedickeanus subsp. gracilis

Synonyms include:Echinocactus schmiedickeanus, Strombocactus schmiedickeanus Turbinicarpus is a cactus from North-Central Mexico that are extremely popular among collectors. The small size and readiness to flower attribute to their popularity. Small stems, often growing hidden in the soil in habitat. In cultivation, the plants are often solitary globose stems with distinct tubercles. Spines vary considerably from species to species. Flowers grow from the stem tips and range from white to dark pink. New:Cacti occur in all shapes and sizes. They are extremely well adapted to drought and able to store water within the structure to ensure survival through dry periods. They can be found surviving in the driest places on the planet. Almost all cacti are succulents, and are often grown in greenhouses, particularly in regions unsuited to their cultivation outdoors. They can be grown in the ground or in suitable containers which means that they are suitable as houseplants, being tolerant of the often dry atmosphere. Potted cacti can be moved outside in the warm summer months.

Upland Cotton, Gossypium hirsutum

Upland cotton is the species of cotton that 90% of the commercially produced cotton textile products come from. It has glaborous pointed lobed leaves and it's seeds are surrounded by the white fluffy material that is harvested and the plant is most known for.

Upright Prairie Coneflower, Ratibida columnifera

Prairie coneflower is an easy-to-grow plant for the border, producing a great profusion of showy flowers throughout the summer with six or seven yellow petals surrounding a very prominent, central brown "cone". Best grown as an annual but if you can't be bothered to shift them at the end of the year, don't worry, they're true perennials and will continue to produce flowers annually.1.2m

Upright prairie coneflower 'Red Midget', Ratibida columnifera 'Red Midget'

Prairie coneflower is an easy-to-grow plant for the border, producing a great profusion of showy flowers throughout the summer with six or seven yellow petals surrounding a very prominent, central brown "cone". Best grown as an annual but if you can't be bothered to shift them at the end of the year, don't worry, they're true perennials and will continue to produce flowers annually.

Urginea maritima syn. drimia maritima, Sea squill

This is a plant that grows from a large bulb (up to 20cms dia, and weighing up to 1 kg), and which produces dark green, leathery metre long leaves in Spring. The leaves die in Autumn, and the tall spike of flowers is then produced. The flower spike can grow up to 2 metres. The flowers are either white or red, depending on the variety

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