The Royal Horticultural Society (RHS), founded in 1804 as the Horticultural Society of London, is the UK's leading gardening charity.
Opuntia microdasys is a species of flowering plant in the cactus family Cactaceae, native and endemic to central and northern Mexico.
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).
Ferocactus viridescens is a species of flowering plant in the cactus family Cactaceae. This rare barrel cactus is known by several common names, including coast barrel cactus, keg cactus and San Diego barrel cactus. Most of its native range is in San Diego County, California, where it is threatened by development, agriculture, and other alterations in its habitat. It is also found in northern Baja California, Mexico.
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.
Mammillaria elongata, the gold lace cactus or ladyfinger cactus, is a species of flowering plant in the family Cactaceae, native to central Mexico. Growing to 15 cm (6 in) tall by 30 cm (12 in) wide, it consists of densely packed clusters of elongated oval stems, covered in harmless yellow or brown spines, and in spring producing white or yellow flowers. It is among the commonest and most variable of its genus in nature, and is a popular subject for cultivation. It has gained the Royal Horticultural Society's Award of Garden Merit.
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.
Mammillaria bombycina, the silken pincushion cactus, is a species of flowering plant in the family Cactaceae.
Mammillaria carmenae, the Isla Carmen pincushion cactus, is a species of flowering plant in the family Cactaceae.
Mammillaria geminispina, the twin spined cactus, is a species of flowering plant in the family Cactaceae, native to central Mexico. It grows to 25 cm (10 in) tall by 50 cm (20 in) broad. The clustering spherical stems, 8 cm in diameter, are covered in white down and white spines. Carmine pink flowers are borne in summer and autumn.
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.
Pilosocereus leucocephalus, called old man cactus, old man of Mexico, tuno, and woolly torch, is a species of cactus in the genus Pilosocereus, native to Mexico and Central America. It has gained the Royal Horticultural Society's Award of Garden Merit.
Rebutia canigueralii is a species of cactus in the genus Rebutia, native to Bolivia. It has gained the Royal Horticultural Society's Award of Garden Merit.
Rebutia mentosa, the crown cactus, is a species of cactus in the genus Rebutia, native to Bolivia. It has gained the Royal Horticultural Society's Award of Garden Merit.
Rebutia neocumingii, the Cuming crown cactus, is a species of cactus in the genus Rebutia, native to Bolivia and Peru. It has gained the Royal Horticultural Society's Award of Garden Merit.
Rebutia pygmaea is a species of cactus in the genus Rebutia, native to Bolivia and northwest Argentina. It has gained the Royal Horticultural Society's Award of Garden Merit.
Rebutia steinbachii, called Steinbach's crown cactus, is a species of cactus in the genus Rebutia, native to Bolivia. It has gained the Royal Horticultural Society's Award of Garden Merit.
Mammillaria pringlei, called the lemon ball, is a species of cactus in the genus Mammillaria, native to Mexico, from Querétaro through to Veracruz and on to México State. It has gained the Royal Horticultural Society's Award of Garden Merit.
Thelocactus macdowellii, called the Chihuahuan snowball, is a species of cactus native to northeastern Mexico. It has gained the Royal Horticultural Society's Award of Garden Merit.
