Origin and Habitat: Uruguay.
Habitat: Native to the grasslands.

• Notocactus scopa var. murielii Hofacker

• Parodia scopa (Spreng.) N.P.Taylor
• Cactus scopa Spreng.
• Cereus scopa (Spreng.) Salm-Dyck ex DC.
• Echinocactus scopa (Spreng.) Link & Otto
• Echinopsis scopa (Spreng.) Carrière
• Malacocarpus scopa (Spreng.) Britton & Rose
• Notocactus scopa (Spreng.) A.Berger
• Peronocactus scopa (Spreng.) Doweld
• Notocactus scopa f. albicans (Arechav.) N.Gerloff & Neduchal
• Echinocactus scopa var. albicans Arechav.
• Echinocactus scopa f. albicans (Arechav.) Schelle
• Notocactus scopa var. albicans (Arechav.) Hofacker
• Notocactus scopa f. albilanatus Jahn
• Notocactus scopa f. candidus (Pfeiff.) Krainz
• Echinocactus scopa var. candidus Pfeiff.
• Echinocactus scopa f. candidus (Pfeiff.) Schelle
• Notocactus scopa var. candidus (Pfeiff.) Backeb.
• Notocactus scopa f. cobrensis (N.Gerloff) N.Gerloff & Neduchal
• Notocactus scopa var. cobrensis N.Gerloff
• Notocactus scopa f. daenikerianus (Krainz) Krainz
• Notocactus scopa var. daenikerianus Krainz
• Notocactus scopa f. erythrinus Havlíček
• Notocactus scopa f. glauserianus (Krainz) Krainz
• Notocactus scopa var. glauserianus Krainz
• Notocactus scopa f. machadoensis (W.R.Abraham) N.Gerloff & Neduchal
• Notocactus scopa var. machadoensis W.R.Abraham
• Notocactus scopa var. murielii Hofacker
• Notocactus scopa f. ramosus (Osten) Backeb.
• Echinocactus scopa f. ramosus Osten
• Notocactus scopa var. ramosus (Osten) Backeb.
• Notocactus scopa f. ruberrimus Frič
• Notocactus scopa f. xicoi (W.R.Abraham) N.Gerloff & Neduchal
• Notocactus scopa var. xicoi W.R.Abraham
• Notocactus scopa f. xiphacanthus (W.R.Abraham) N.Gerloff & Neduchal
• Notocactus scopa var. xiphacanthus W.R.Abraham
• Notocactus soldtianus Vliet
• Parodia scopa f. cristata hort.
• Parodia scopa f. splendens hort.

• Parodia scopa subs. marchesii (W.R.Abraham) Hofacker
• Notocactus scopa subs. marchesii (W.R.Abraham) Doweld
• Notocactus scopa var. marchesii W.R.Abraham
• Notocactus scopa f. marchesii (W.R.Abraham) N.Gerloff & Neduchal
• Peronocactus scopa subs. marchesii (W.R.Abraham) Doweld

• Parodia scopa subs. neobuenekeri (F.Ritter) Hofacker & P.J.Braun
• Notocactus neobuenekeri F.Ritter
• Notocactus scopa subs. neobuenekeri (F.Ritter) Doweld
• Parodia neobuenekeri (F.Ritter) Anceschi & Magli
• Peronocactus scopa subs. neobuenekeri (F.Ritter) Doweld

• Parodia scopa subs. succinea (F.Ritter) Hofacker & P.J.Braun
• Notocactus scopa subs. succineus (F.Ritter) Doweld
• Notocactus scopa f. succineus (F.Ritter) N.Gerloff & Neduchal
• Notocactus succineus F.Ritter
• Parodia succinea (F.Ritter) N.P.Taylor
• Peronocactus scopa subs. succineus (F.Ritter) Doweld
• Parodia scopa subs. succinea f. albiseta hort.
• Notocactus scopa var. albispinus hort.
• Notocactus succineus var. albisetus hort.
• Notocactus succineus var. albispinus hort.
• Parodia scopa f. albiseta hort.
• Parodia scopa var. sulphurea hort.
• Notocactus scopa var. sulphureus hort.
• Notocactus sulphureus hort.

• Parodia scopa cv. inermis
• Notocactus scopa f. monstruosus
• Notocactus scopa cv. inermis
• Parodia scopa f. monstruosa
• Parodia scopa cv. inermis cristata
• Notocactus scopa f. monstruosus cristatus
• Notocactus scopa cv. inermis cristatus hort.
• Parodia scopa f. monstruosa cristata

Description: Parodia scopaSN|15897]]SN|15897]] f. murielii, only published under the genus Notocactus, is one of the varieties of the wide ranging and very variable Parodia scopaSN|15897]]SN|15897]] distinguished for its silvery spined stems. The flowers are very showy, glossy yellow.
Habit: It is perennial stem succulent often clustering. The stems are almost hidden by soft tufts of bristly spines somewhat similar to small brushes.
Stem: Dark green, at first globular, becoming bit columnar to clavate with age, depressed apically, up to 45 cm tall, 6-10 cm in diameter.
Ribs: 25-30 (sometime up to 40 or more) low, obtuse, finely notched into low warts tipped with areoles, which may spiral slightly.
Areoles: White woolly.
Central spines: About 4 (but varying from 2 to 12) medium length (6-12 mm long), needle-like, stouter than radials, purple, red-brown.
Radial spines: Shorter, very numerous fine, bristles-like, glassy white, 5-7 mm long, spreading around.
Flowers: A cluster of satiny, bright yellow flowers spring in the upper part of the stem forming a ring, The are 2-4 cm long and 3,5-4,5 cm in diameter. , Pistil with about 10, rayed, bright crimson stigma lobes. Tube short. Scales on the ovary woolly with brown bristles.
Blooming season: June-July.
Fruits: Globose, about 7 mm in diameter, opening at maturity, with numerous seeds.
Seeds: Dull black tuberculate.

Bibliography: Major references and further lectures
1) Edward Anderson “The Cactus family” Timber Press, Incorporated, 2001
3) James Cullen, Sabina G. Knees, H. Suzanne Cubey "The European Garden Flora Flowering Plants: A Manual for the Identification of Plants Cultivated in Europe, Both Out-of-Doors and Under Glass" Cambridge University Press, 11/Aug/2011
4) David R Hunt; Nigel P Taylor; Graham Charles; International Cactaceae Systematics Group. "The New Cactus Lexicon" dh books, 2006

Cultivation and Propagation: It is easy to grow. It prefers a neutral to slightly acidic mineral-based potting mix with a good drainage. It likes a warm bright location, does great in partial shade but doesn't like full, hot blazing sun in the central summer month. Can support quite some water during the growing season but pot plants in winter are wet-sensitive and needs to be kept dry (rots easily if soil is wet and cold) tends to lose its roots in winter. Usually it is recommended to over-winter this plant in a bright and warm greenhouse with at least 8-10° C , but it has proved to tolerate temperatures as low as -5° C for short periods.
Propagation: Seeds, cuttings or root suckers (if available). Not too difficult to raise from seed.