All the information and photos in cactus art files are now available also in the new the Enciclopedia of Cacti. We hope you find this new site informative and useful.

The areoles of the monstrous form of Notocactus werdermannianus  merges to form concentric lines.
 

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The epidermis  is harder than in the normal Notocactus  and cracks easily but this is not a defect and the plant will not suffer for this.

Cultivation: It is easy to grow. They like a warm bright location, does great in partial shade avoid full sun.  They need good drainage and prefer a neutral to slightly acidic compost with plenty of extra grit. Water during the summer. Best if watered with rain water. Keep above 0°C and rather dry in winter, rot easily if the substrate is wet and cold, tends to lose its roots in winter.

Propagation: Grafting or cutting

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Basionym : Notocactus werdermannianus Herter 1942

Accepted Scientific name: Parodia werdermanniana (Herter) N. P. Tayor 1987
forma mostruosa

Origin:  Garden origin (Nursery produced cultivar) The standard species comes from Brazil (Rio Grande do Sul) and Uruguay (Tacuarembo)

Conservation status: Listed in CITES Appendix II

Synonyms:

• Notocactus ferrugineus H. Schlosser 1982
• Notocactus memoralis Prestlé 1988
• Notocactus vanvlietii Raush 1970

Description: Notocactus werdermannianus is a (usually) simple stemmed small cactus with bright yellow flowers. This species shares some characteristics with wigginsia
Stem: Globular to slightly cylindrical, often flattened up to 13 cm tall and 10 cm in diameter, yellowish-green to green.
Ribs: up to 40, vertical, straight rounded with many small tubercles.
Areoles: White, wooly and closely set one to each other.
Radial spines: About 15-20, setaceous, more or less erected, whitish or yellowish 4-5 mm long.
Central spines: 4-partite yellowish or reddish (N. ferrugineus) acicular, sharp and flexible up to 15 mm long, the lowest of them longer and pointing downward.
Flowers: About 6 cm long, up to 7 cm in diameter, pale yellow and satiny. Tepals lanceolate darker at the tip, style quite long rich egg-yellow coloured, stigma lobes10-12 carmine red.
Seeds: With distinctive longitudinally-oriented fine striate cuticular sculpturing.

forma mostruosa (Monstous form): This plant is a rare oddity with areoles merging to form concentric lines. The epidermis is harder than in the normal Notocactus and cracks easily but this is not a defect and the plant will not suffer for this, and also the fact that the body splits open permits to the plant to develop original and strange shapes.
 

 
The fact that the plant's body splits open is not a defect but the peculiar characteristic of this odd plant. All the stems will soon crack permitting the plant to develop original and strange shapes.

All the information and photos in cactus art files are now available also in the new the Enciclopedia of Cacti. We hope you find this new site informative and useful.