Propagation: Seeds (seldom produces offsets). If they are not, fungicides won't help all that much. Rot it is only a minor problem with gymnocalyciums if the plants are watered and “aired” correctly. Rot: This species is particularly easy and accommodating, seldom suffer of cryptogamic diseases. Mealy bugs: Mealy bugs occasionally develop aerial into the new growth among the wool with disfiguring results, but the worst types develop underground on the roots and are invisible except by their effects. Red spiders: Red spiders may be effectively rubbed up by watering the plants from above. Nonetheless, there are several pests to watch for: Pests & diseases: It may be attractive to a variety of insects, but plants in good condition should be nearly pest-free, particularly if they are grown in a mineral potting-mix, with good exposure and ventilation. It look fine in a cold greenhouse and frame or outdoor in a rockery. Uses: It is an excellent plant for container growing. Tends to bronze in strong light, which encourages flowering and heavy spine production, but is likely to suffer from sun scorch or stunted growth if over exposed to direct sunlight during the hottest part of the day in summer. Hardiness: Quite frost resistant if kept dry -5° C (Temperature Zone USDA 9-10), but for safe cultivation it is best to avoid freezing temperatures.Įxposition: The plant tolerates extremely bright situations but enjoys filtered sunlight or afternoon shade, inside it needs bright light, and some direct sun. Watering: Needs moderate to copious waterings in summer, but do not overwater (Rot prone), keep dry in winter at a minimum temperature of 0☌.įertilization: Feed with a high potassium fertilizer in summer. Repotting: This plant needs plenty of space for its roots, repotting should be done every other year or when the it has outgrown its pot. Prefer a low pH compost, avoid substrata rich in limestone otherwise growth will stop altogether. Soils: It likes very porous standard cactus mix soil. Growth rate: It is a relatively rapidly growing and easily flowering species. Distribution: Cerro León, Boquerón department of Paraguay.Ĭultivation and Propagation: Gymnocalycium friedrichii is a summer grower species that is easy to cultivate. Gymnocalycium stenopleurum F.Ritter : Distingushed from Gymnocalycium miahanovichii for the white, fully opening flowers.: variegated cultivars only partially de-coloured. Hibotan characterized by more or less red coloured bodies. : this is the crested form of the chlorophyll-less cv. : chlorophylles mutants, characterized by more or less red coloured bodies. Distribution: Toro Alarachii, southern Chaco, Argentina. stenogonum Frič & Pazout : has larger stem (up to 15 cm in diameter), smooth fresh green to bronze in full sun. But the essential thing is its pale or brownish-yellow, not fully opening flower. Gymnocalycium mihanovichii (Frič ex Gürke) Britton & Rose : It has wider, lower ribs, in juvenile plants divided into separate chins, in maturity every rib have flat surface and a pleat above each areole. Distribution: Yrebdaque, Boquerón, Paraguay. Flowers are pale pink and open up entirely. friedrichii, with sharp ribs striped with white, and only 3 weak spines. moserianum Pazout ex Moser : has brown bodies 2 times larger than G. : Crested form with nice stems reddish brown to dark grape coloured. Besides it has tall slender ribs and roller-shaped prominent thickening around areoles. Gymnocalycium friedrichii (Werderm.) Pazout : Distingushed from Gymnocalycium miahanovichii for the prevalently purplish pink, wide open flowers and well-pronounced polymorphism of spines.These three taxa spread from south to north (North-Western Paraguay): The typical "mihanovichii" inhabits the very south of the area – south and south-east of province Boqueron "stenopleurum" inhabits a limited area on the very north – in Cerro Leon region and has characteristic recognizable habitus for "friedrichii" all the area between two mentioned points is indicated. Not taking into account their taxonomic definition they are basic points of the complex with many transitional forms between. Thus we have 3 taxa: "mihanovichii", "friedrichii" and "stenopleurum". In 1979 Ritter made a description of Gymnocalycium stenopleurum that sometimes can be found under the incorrect name G. in 1964 but it has not been officially approved. friedrichii was introduced by Werdermann in 1936. Subspecies, varieties, forms and cultivars of plants belonging to the Gymnocalycium mihanovichii/stenopleurum group Succulenta (Netherlands) 18:166, 1936 Author: van den Thoorn nom. Gymnocalycium mihanovichii (Frič ex Gürke) Britton & Rose.Gymnocalycium mihanovichii (Frič ex Gürke) Britton & Rose
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