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Coryphantha cornifera (Rhinoceros Cactus)

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Scientific Name

Coryphantha cornifera (DC.) Lem.

Common Names

Rhinoceros Cactus

Synonyms

Cactus radians, Cactus scolymoides, Coryphantha bernalensis, Coryphantha cornuta, Coryphantha daimonoceras, Coryphantha impexicoma, Coryphantha maliterrarum, Coryphantha radians, Coryphantha schwarziana, Coryphantha scolymoides, Echinocactus cornifer, Echinocactus radicans, Mammillaria cornifera, Mammillaria cornuta, Mammillaria daimonoceras, Mammillaria impexicoma, Mammillaria radians, Mammillaria scolymoides

Scientific Classification

Family: Cactaceae
Subfamily: Cactoideae
Tribe: Cacteae
Genus: Coryphantha

Description

Coryphantha cornifera is a cactus with a flat, globose to cylindrical stem, up to 5 inches (12.5 cm) tall, up to 6 inches (15 cm) in diameter and dull olive-green in color. Radial spines are 10 to 20, pale whitish, yellow or horn-colored, sometimes darker tipped and up 0.6 inch (1.5 cm) long. Central spines are up to 3, dark brown, becoming grey from the base and usually about 0.4 inch (1 cm) long. The flowers are yellow, funnel-shaped and up to 3 inches (7.5 cm) in diameter.

Photo via wikipedia.org

Hardiness

USDA hardiness zone 9a to 11b: from 20 °F (−6.7 °C) to 50 °F (+10 °C).

How to Grow and Care

If you can grow cacti and succulents successfully, you can likely grow Coryphantha without too much trouble. Coryphantha love to be in a very bright exposure, but generally not to direct light of sun. The risk, especially during the hottest hours of the day and during the summer, is to get sunburned.

The average winter minimum temperature, in general, should not fall below 40°F (5°C), unless individual exceptions. Adult plants (at least 2 years of age) can withstand frosts also very intense, but only if the temperature rises again quickly. To encourage better flowering, allow the plants to enjoy a cooling period in the winter and suspend watering.

Allow the soil mix to become nearly dry between waterings, but then water thoroughly. Immaculate drainage is essential, so never let the pots sit in water. Suspend watering in the winter, but mist occasionally.

This cacti are very susceptible to rot and therefore require a well-drained soil. Use potting mix that is labeled for cacti or succulents… – See more at: How to Grow and Care for Coryphantha

Origin

It is native to Mexico.

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