Notocactus scopa var. cobrensis

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Notocactus scopa var. cobrensis N.Gerloff
Internoto 11(1): 3. 1994
Family: CACTACEAE

= Notocactus scopa f. cobrensis (N.Gerloff) N.Gerloff & Neduchal
Internoto 24(3-4): 56. 2003 [Nov 2003]

Accepted Scientific Name: Parodia scopa (Spreng.) N.P.Taylor
Bradleya 5: 93. 1987

Notocactus scopa var. cobrensis (Notocactus scopa f. cobrensis) Photo by: Valentino Vallicelli

Origin and Habitat: Rio Grande do Sul (Brazil) Type location: Minas DO Camaqua, Rio Grande Do Sul, Brazil (field number HU80)
Habitat: Grows together with Echinopsis spec. HU 87 and N. ottonis HU11a among grasses and Bromelia sp. partly among larger rock fragment in the crevices and niches.

Synonyms:

Notocactus scopa f. cobrensis (N.Gerloff) N.Gerloff & Neduchal

Notocactus scopa var. cobrensis N.Gerloff

See all synonyms of Parodia scopa

Description: It is a small and very beautiful cactus completely covered with wool and spines. Branches to form small groups or rarely remain solitary,
Stem: Cylindrical, 3,5-7 cm in diameter, 6-10(-15) cm tall, epidermis dark green concealed by the dense spines.
Ribs: 21 to 27, approx 5 -7 mm wide and 2-4 mm highly, arranged into tubercles, on which the areoles sits.
Areoles: Roundish, 2-3 mm in diameter, very close one to each other (approx 2 mm apart), filled by white wool that persist for some years, then naked. Annual increase 5-6 areoles per ribs.
Spines: Very dense white and copper coloured, not stinging. The spines in the blooming areoles are often darker.
Radial spines: 40 - 50 up to 7 mm long, very fine, pure white, lying close, radiating, interlacing with the spines of the adjacent areoles.
Central spines: 4 – 8 (of which 4 true centrals and 3-4 intermediate), up to5 mm long, Longer and stouter, spreading, copper-red or brown. The central spines often are not present in the new apical growth but appears later.
Flowers: Opening at the top of the stem, approx 35 mm long and 40 mm wide, sulphur-yellow, odourless, self sterile.
Tube: 12 - 15 mm long, funnel-shaped, diameter at the base 4 mm, above 13-15 mm Ø, with yellowish epidermis, completely covered by wool and red-brown to dark-brown bristles up to 10 mm long. Stamens 7-9 mm long, golden-yellow.
Petals: lanceolate to narrowly lanceolated, up to 4 mm wide and 21 mm long, inside and outside sulphur-yellow, shining. Stylus: 17 mm long, 1.2-1.5 mm Ø, dark-carmine, with 11 (12) stigma lobes up to 3.5 mm long. Blooming season: Summer. The flowers pen on the late morning and close at night.
Fruits: Small 6-7 mm broad and long, fleshy, pinkish, cover with white cotton wool, drying yellowish, irregularly opening with the releasing of part of the seeds to the ground (but some of the seeds remain on the plant). Each fruit contains approx 80 seeds.
Seeds: Helmet-shaped, black. Length 0.65 mm, width 0.5 mm, height of 0.4 mm, Hilum oval, curved, light brown. Testa convex to hemispherical, bordered with 5 to 7 adjoining cells, 0.03 - 0.07 mm Ø. Microphylar hole 0.13-0.1 mm Ø and 0.04 mm.

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Subspecies, varieties, forms and cultivars of plants belonging to the Parodia scopa group

Notocactus scopa f. cobrensis (N.Gerloff) N.Gerloff & Neduchal: has dark-red central spines and shorter white spines and wool around. It is very slow growing. Distribution: Rio Grande do Sul (Brazil)
Notocactus scopa var. murielii Hofacker: has silvery spined stems. Distribution: Uruguay.
Notocactus scopa f. xicoi (W.R.Abraham) N.Gerloff & Neduchal: has fewer ribs and fewer spines. Particularly striking are the numerous purple brown central spines. Distribution: Pedras Altas and Herval, Rio Grand do Sul, Brazil.
Notocactus scopa f. xiphacanthus (W.R.Abraham) N.Gerloff & Neduchal: has larger stems with fewer ribs and usually a long, dark, sword-shaped central spine. Distribution: Minas, Lavalleja, Uruguay.
Parodia scopa (Spreng.) N.P.Taylor: has stems with 30-40 ribs, about 4 central spines, and 40 or more radials. Distribution: Southern Brazil and Paraguay.
Parodia scopa f. cristata hort.: Crested form.
Parodia scopa subs. marchesii (W.R.Abraham) Hofacker: has stems with fewer ribs (19-28), 2-4 white or yellowish central spines, and about 40 radials. Distribution: Treinta y Tres, Uruguay.
Parodia scopa subs. neobuenekeri (F.Ritter) Hofacker & P.J.Braun: stems with 18-21ribs, 6-12 strong central spines, and 30-40 radials. Distribution: near Camaqua, Rio Grande do Sul, Brazil.
Parodia scopa f. splendens hort.
Parodia scopa subs. succinea (F.Ritter) Hofacker & P.J.Braun: has stems with 18-24 ribs, 8-12 central spines, and 15-30 radials. Distribution: near Sao Gabriel, Rio Grande do Sul, Brazil.
Parodia scopa subs. succinea f. albiseta hort.: has pure white spines.
Parodia scopa var. sulphurea hort.: This is only a common hoticultural name for "Parodia scopa ssp. succinea"
Parodia scopa cv. inermis: has spineless areoles with a short white wool, they are arranged geometrically and contrast with the stem. A few small bristly spines are occasionally produced in the flowering areoles.
Parodia scopa cv. inermis cristata: Crested form.

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Notes: The Notocactus scopaSN|15901]]SN|15901]] aggregate is an ensemble of related species. This plant has been Transferred to Parodia in 1997 by David Hunt.

Cultivation and Propagation: This is an easy plant to cultivate. It require a mineral-based potting mix with a good drainage. 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). 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.
Sun Exposure: Light shade to full sun but doesn't like full, hot blazing sun in the central summer month.
Propagation: Seeds, cuttings. Not too difficult to raise from seed.

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