The Royal Horticultural Society (RHS), founded in 1804 as the Horticultural Society of London, is the UK's leading gardening charity.
Rudbeckia hirta, commonly called black-eyed Susan, is a North American flowering plant in the family Asteraceae, native to Eastern and Central North America and naturalized in the Western part of the continent as well as in China. It has now been found in all 10 Canadian Provinces and all 48 of the states in the contiguous United States.
Lobularia maritima is a species of low-growing flowering plant in the family Brassicaceae. Its common name is sweet alyssum or sweet alison, also commonly referred to as just alyssum.
Tagetes patula, the French marigold, is a species of flowering plant in the family Asteraceae, native to Mexico and Guatemala with several naturalised populations in many other countries. It is widely cultivated as an easily grown bedding plant, with thousands of different cultivars in brilliant shades of yellow and orange.
Celosia argentea, commonly known as the plumed cockscomb or silver cock's comb, is a herbaceous plant of tropical origin in the Amaranthaceae family from India and Nepal. The plant is known for its very bright colors. In India and China it is known as a troublesome weed.
Rudbeckia laciniata, the cutleaf coneflower, is a species of flowering plant in the family Asteraceae. It is native to North America, where it is widespread in both Canada and the United States. Its natural habitat is wet sites in flood plains, along stream banks, and in moist forests. Common names other than cutleaf coneflower include cutleaf, goldenglow, green-headed coneflower, tall coneflower, sochan and thimbleweed.
Lavandula angustifolia, formerly L. officinalis, is a flowering plant in the family Lamiaceae, native to the Mediterranean. Its common names include lavender, true lavender and English lavender ; also garden lavender, common lavender and narrow-leaved lavender.
Dracopis is a monotypic genus with Dracopis amplexicaulis the sole species. It is native to North America.
Alchemilla mollis, the garden lady's-mantle or lady's-mantle, is a species of flowering plant in the family Rosaceae. This herbaceous perennial plant is native to Southern Europe and grown throughout the world as an ornamental garden plant. It grows 30 to 45 cm tall, with leaves that are palmately veined, with a scalloped and serrated margin. The stipules are noteworthy in that they are fused together and leaf like. The chartreuse yellow flowers are held in dense clusters above the foliage. A. mollis has gained the Royal Horticultural Society's Award of Garden Merit. The plant self-seeds freely and can become invasive.
Rudbeckia fulgida, the orange coneflower or perennial coneflower, is a species of flowering plant in the family Asteraceae, native to eastern North America.
Echinacea purpurea, the eastern purple coneflower, purple coneflower, hedgehog coneflower, or echinacea, is a North American species of flowering plant in the family Asteraceae. It is native to parts of eastern North America and present to some extent in the wild in much of the eastern, southeastern and midwestern United States as well as in the Canadian Province of Ontario. It is most common in the Ozarks and in the Mississippi/Ohio Valley. Its habitats include dry open woods, prairies and barrens.
Romneya coulteri, the Coulter's Matilija poppy or California tree poppy, is a perennial species of flowering plant in the poppy family Papaveraceae. Native to southern California, USA, and Baja California, Mexico, it grows in dry canyons in chaparral and coastal sage scrub plant communities, sometimes in areas recently burned. It is a popular ornamental plant, kept for its large, showy flowers.
Rhododendron viscosum, the swamp azalea, clammy azalea or swamp honeysuckle, is a species of flowering plant in the heath family Ericaceae. This deciduous shrub, growing to 2.5 m (8.2 ft) tall and broad, is native to the eastern United States. It has rounded matt green leaves. In early summer it produces funnel-shaped white flowers flushed pink. The flowers have prominent stamens and are strongly fragrant.
Symphyotrichum ericoides, known as white heath aster, frost aster, or heath aster, is a species of flowering plant in the family Asteraceae native to much of central and eastern North America. It has been introduced to parts of Europe and western Asia.
Rudbeckia triloba, the browneyed or brown-eyed susan, thin-leaved coneflower or three-leaved coneflower, is a species of flowering plant in the family Asteraceae with numerous, yellow, daisy-like flowers. It is native to the central and eastern United States and is often seen in old fields or along roadsides. It is also cultivated as an ornamental.
Allium cristophii, the Persian onion or star of Persia, is a species of flowering plant in the family Amaryllidaceae, native to Iran, Turkey, and Turkmenistan, though grown as an ornamental bulbous plant in many parts of the world. It may be sold under the synonym of Allium albopilosum.
Gypsophila repens, the alpine gypsophila or creeping baby's breath, is a species of flowering plant in the family Caryophyllaceae, native to the mountains of central and southern Europe, where it grows on dry, chalky slopes. The Latin name literally means "creeping chalk-lover". It is a prostrate, mat-forming herbaceous perennial, growing around 20 cm (8 in) tall by 30–50 cm (12–20 in) wide. For much of the summer it bears masses of star-shaped flowers which may be white, lilac or light purple, in loose panicles.
Ipheion uniflorum is a species of flowering plant, related to the onions, so is placed in the allium subfamily (Allioideae) of the Amaryllidaceae. It is known by the common name springstar, or spring starflower. Along with all the species of the genus Ipheion, some sources place it in the genus Tristagma, but research published in 2010 suggested that this is not correct. It is native to Argentina and Uruguay, but is widely cultivated as an ornamental and reportedly naturalized in Great Britain, France, Australia, New Zealand and the United States.
Ornithogalum nutans, known as drooping star-of-Bethlehem, is a species of flowering plant in the family Asparagaceae, native to Europe and South West Asia. It is a bulbous perennial growing to 20–60 cm (8–24 in) tall by 5 cm (2 in) wide, with strap-shaped leaves and green striped, pendent grey-white flowers in spring. It is cultivated, and has naturalized, outside its native range, for example in North America. It has become extremely invasive along the Chesapeake and Ohio Canal in Maryland. At least in North America, it is not as common as Ornithogalum umbellatum.
Heliopsis helianthoides is a species of flowering plant in the family Asteraceae, known by the common names rough oxeye, smooth oxeye and false sunflower. It is native to eastern and central North America from Saskatchewan east to Newfoundland and south as far as Texas, New Mexico, and Georgia.
