The Royal Horticultural Society (RHS), founded in 1804 as the Horticultural Society of London, is the UK's leading gardening charity.
Grevillea is a diverse genus of about 360 species of evergreen flowering plants in the family Proteaceae, native to rainforest and more open habitats in Australia, New Guinea, New Caledonia, Sulawesi and other Indonesian islands east of the Wallace Line. It was named in honour of Charles Francis Greville, an 18th century patron of botany and co-founder of the Royal Horticultural Society. The species range from prostrate shrubs less than 50 cm (20 in) tall to trees 35 m (115 ft) tall. Common names include grevillea, spider flower, silky oak and toothbrush plant. Closely related to the genus Hakea, the genus gives its name to the subfamily Grevilleoideae.
Hydrangea quercifolia, commonly known as oakleaf hydrangea or oak-leaved hydrangea, is a species of flowering plant in the family Hydrangeaceae. It is native to the southeastern United States, in woodland habitats from North Carolina west to Tennessee, and south to Florida and Louisiana. A deciduous shrub with white showy flower heads, it is a commonly grown garden plant. Numerous cultivars are available commercially.
Rosa gallica, the Gallic rose, French rose, or rose of Provins, is a species of flowering plant in the rose family, native to southern and central Europe eastwards to Turkey and the Caucasus. It was one of the first species of rose to be cultivated in central Europe.
Meconopsis is a genus of flowering plants in the family Papaveraceae. It was first created by French botanist Viguier in 1814 for the species known by the common name Welsh poppy, which Carl Linnaeus had described as Papaver cambricum. The genus name means poppy-like. Himalayan species discovered later were also placed in Meconopsis. In the 21st century, it was discovered that the Himalayan species were not closely related to the Welsh poppy, which has been restored to Papaver. All species placed in Meconopsis are now native to the Himalayas and surrounding regions. They have attractive, usually blue flowers.
The Award of Garden Merit (AGM) is a long-established annual award for plants by the British Royal Horticultural Society (RHS). It is based on assessment of the plants' performance under UK growing conditions.
Parodia is a genus of flowering plants in the cactus family Cactaceae, native to the uplands of Argentina, Peru, Bolivia, Brazil, Colombia and Uruguay. This genus has about 50 species, many of which have been transferred from Eriocactus, Notocactus and Wigginsia. They range from small globose plants to 1 m (3 ft) tall columnar cacti. All are deeply ribbed and spiny, with single flowers at or near the crown. Some species produce offsets at the base. They are popular in cultivation, but must be grown indoors where temperatures fall below 10 °C (50 °F).
Sinningia is a genus of flowering plants in the family Gesneriaceae. It is named after Wilhelm Sinning (1792–1874), a gardener of the Botanische Gärten der Friedrich-Wilhelms-Universität Bonn. There are about 65 species of tuberous herbaceous perennials, all occurring in Central and South America, with the greatest concentration of species occurring in southern Brazil.
Dianthus gratianopolitanus, commonly known as the Cheddar pink or clove pink, is a species of plant in the family Caryophyllaceae. It is a herbaceous perennial, hardy to zones 4–8. It grows to a height of 0.5 to 1 feet, blooming from May to June. Flowers are fragrant and rose pink. Grows best in full sun, and has medium water requirements. Overwatering or poor drainage leads to crown rot, and plants do not tolerate wet winter soil conditions.
Veronica peduncularis, the creeping speedwell, is a flowering plant in the plantain family, Plantaginaceae. Listed under its synonym Veronica umbrosa, its cultivar 'Georgia Blue' has gained the Royal Horticultural Society's Award of Garden Merit.
Teucrium fruticans is a species of flowering plant in the mint family Lamiaceae, native to the western and central Mediterranean. Growing to 1 m (3 ft) tall by 4 m (13 ft) wide, it is a spreading evergreen shrub with arching velvety white shoots, glossy aromatic leaves and pale blue flowers in summer.
Parodia leninghausii is a species of South American cactus commonly found as a houseplant. Common names include Lemon Ball cactus, Golden Ball cactus and Yellow Tower cactus.
Parodia magnifica is a species of flowering plant in the cactus family Cactaceae, native to southern Brazil. One of several species called ball cactus, it grows to 7–15 cm (3–6 in) tall by 45 cm (18 in) broad, with heavily ribbed, spherical to columnar, spiny and hairy stems, bearing pale yellow flowers in summer. Its natural habitat is cool, dry temperate grassland at elevations of up to 800 m (2,600 ft). Populations are sparse and fragmented, and it has been designated as “Endangered” by the IUCN Red List.
Celtica gigantea, commonly called giant feather grass, giant needle grass, or golden oats, is a species of flowering plant in the grass family Poaceae, native to southern Europe. It occurs in Spain and other Mediterranean countries. It is still widely referenced in the horticultural literature under its synonym Stipa gigantea.
Parodia scopa, the silver ball cactus, is a species of flowering plant in the cactus family Cactaceae, native to upland southern Brazil and Uruguay. It is a ball- or cylinder-shaped cactus growing to 5–50 cm (2–20 in) tall by 10 cm (4 in) broad, with a spiny, woolly crown and pale yellow flowers in summer.
Verbascum epixanthinum, the yellow mullein, is a species of flowering plant in the family Scrophulariacee, native to Greece. Growing to 1 m (3.3 ft) tall, it is an erect herbaceous perennial with grey-green leaves, and dense 70 cm (28 in) spikes of yellow flowers in summer. Though perennial, it may be short-lived.
Lysimachia ephemerum, the willow-leaved loosestrife or milky loosestrife, is a species of flowering plant in the primrose family Primulaceae, native to France, Spain, Portugal and Morocco. Against grey-green foliage this hardy herbaceous perennial bears erect racemes of delicate white flowers with purple stamens on 1 m (3.3 ft) stems in early summer. It is cultivated as an ornamental plant, and holds the Royal Horticultural Society's Award of Garden Merit. It requires a position in full sun, and reliably moist soil.
Parodia crassigibba, the green tomato cactus, is a species of cactus in the genus Parodia, native to Rio Grande do Sul state in southern Brazil. It has gained the Royal Horticultural Society's Award of Garden Merit as a houseplant.
Parodia chrysacanthion, the golden powder puff, is a species of cactus in the genus Parodia, native to northwest Argentina. It has gained the Royal Horticultural Society's Award of Garden Merit.
Close-up of flower
Parodia concinna "subspecies blaauwiana", which is no longer accepted
Crown
On an East German postage stamp
