Nigel Paul Taylor

Parodia scopa (syn. Notocactus 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. The specific epithet scopa means "broom" and refers to the long spines. The species was transferred from Notocactus to Parodia in 1997 by David Hunt. In cultivation it requires a minimum temperature of 10 °C (50 °F), therefore in temperate regions it must be grown

Parodia ottonis, also known as Indian head cactus, is a species of flowering plant in the family Cactaceae. This cactus species is found in Argentina, Brazil, Paraguay and Uruguay. There are two recognized subspecies. The epithet ottonis honors the German botanist Christoph Friedrich Otto.

Parodia mammulosa is a species of succulent plant in the family Cactaceae.

Parodia herteri is a species of cactus in the subfamily Cactoideae. It is endemic to Brazil. It was named for botanist Wilhelm Herter. The first description was in 1936 as Echinocactus herteri by Erich Werdermann. It was described as Parodia herteri in 1987 by Nigel Paul Taylor.

Parodia concinna, the sun cup, is a species of cactus in the genus Parodia, native to southern Brazil and Uruguay. It has gained the Royal Horticultural Society's Award of Garden Merit.

Parodia buiningii is a rare species of cactus native to South America. It is a solitary spherical or oblate cactus only a few inches in height with long, yellow spines. It bears yellow flowers, and produces hairy fruit and black seeds. It is found surrounding the towns of Santana do Livramento, Brazil and Rivera, Uruguay.

Arthrocereus glaziovii is a species of flowering plant in the family Cactaceae. It is succulent cactus subshrub endemic to southeastern Brazil. Its natural habitat is rocky areas. It is threatened by habitat loss.

Tacinga palmadora is a species of plant in the family Cactaceae.

Rhipsalis hoelleri is a species of plant in the family Cactaceae. It is endemic to Brazil. Its natural habitat is subtropical or tropical moist lowland forests. It is threatened by habitat loss.

Cipocereus bradei is a species of cactus. It is endemic to the state of Minas Gerais in Brazil. It is threatened by habitat loss.

Cereus mirabella, synonym Mirabella minensis, is a species of plant in the family Cactaceae. It is endemic to Brazil. Its natural habitat is dry savanna. It is threatened by habitat loss.

Tacinga werneri is a species of plant in the family Cactaceae. It is endemic to Brazil. Its natural habitats are subtropical or tropical dry forests and hot deserts. It is threatened by habitat loss.

Tacinga saxatilis is a species of plant in the family Cactaceae. It is endemic to Brazil. Its natural habitats are subtropical or tropical dry forests, temperate shrubland, and rocky areas. It is threatened by habitat loss.

Tacinga inamoena is a species of plant in the family Cactaceae.

Sclerocactus papyracanthus is a species of cactus known by the common names paperspine fishhook cactus, grama grass cactus, paper-spined cactus, and toumeya. It is native to North America, where it occurs from Arizona to New Mexico to Texas and into Chihuahua, Northeastern Mexico.

Schlumbergera kautskyi is a species of plant in the family Cactaceae. It is endemic to a small area of the coastal mountains of south-eastern Brazil where its natural habitat is rocky areas. It is threatened by habitat loss. It is in the same genus as the popular houseplant known as Christmas cactus or Thanksgiving cactus.

Melocactus caroli-linnaei is a cactus (a member of the family Cactaceae) found in Jamaica. When mature it is columnar, up to 1 m (3.3 ft) high. Like all species of Melocactus, it forms a "cephalium" when mature – a dense mass of areoles covered with wool and spines at the tip of the stem. Flowers are produced only from the cephalium.

Sclerocactus johnsonii (synonyms including Echinomastus johnsonii) is a species of cactus known by the common names Johnson's beehive cactus and Johnson's fishhook cactus. It is native to the southwestern United States from eastern California to Utah and northwestern Mexico, where it can be found in desert scrub habitat. It produces an egg-shaped or cylindrical stem up to 25 centimetres (10 inches) tall by 10 centimetres (4 inches) wide. It is covered densely in straight and curving spines which may be up to 4 centimetres (1+1⁄2 inches) long and come in shades of yellow, gray, lavender, and

Pilosocereus azulensis is a species of plant in the family Cactaceae. It is endemic to Brazil. Its natural habitat is subtropical or tropical dry forests. It is threatened by habitat loss. Pilosocereus azulensis is commonly referred to as Xique-Xique-Azul or Facheiro do Azul in Brazil although it has no affiliation with the genus Xiquexique.

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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.

Echinocereus schmollii is a species of cactus native to Mexico.

Echinocereus pseudopectinatus is a species of cactus native to Mexico and the United States.

Echinocereus primolanatus is a species of cactus native to Mexico.

Echinocereus parkeri is a species of cactus native to Mexico.

Echinocereus leucanthus is a species of cactus native to Mexico.

Discocactus pseudoinsignis is a species of Discocactus found in Brazil.

Cipocereus crassisepalus is a species of cactus endemic to the state of Minas Gerais in Brazil.

Cereus mortensenii is a species of plant found in seasonally dry areas of Venezuela. It is the only Cereus species that develops a cephalium.

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