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Mammillaria luethyi

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Scientific Name

Mammillaria luethyi G.S. Hinton

Scientific Classification

Family: Cactaceae
Subfamily: Cactoideae
Tribe: Cacteae
Subtribe: Cactinae
Genus: Mammillaria

Description

Mammillaria luethyi is a small, very attractive, solitary or branched cactus. It is one of the most spectacular of all Mammillarias. The stems are rounded to flattened, very dark-green, almost black and up to 0.8 inch (2 cm) diameter. Spines are short, soft, white and more than 80, forming a dense cluster. The flowers are up to 1.2 inches (3 cm) long and about the same in diameter, light magenta at the top and white at the base. The fruits are globular, yellowish-green to reddish-green and up to 0.2 inch (0.5 cm) in diameter.

Photo via liveinternet.ru

Hardiness

USDA hardiness zones 10a to 11b: from 30 °F (−1.1 °C) to 50 °F (+10 °C).

How to Grow and Care

To encourage better flowering, allow the plants to enjoy a cooling period in the winter and suspend watering. Unlike many other cacti, which use their ribs as storage devices, Mammillaria feature raised tubercles, from which spines emerge. When you water, the tubercles will expand to allow for increased water storage. The flowers emerge from the axils of these tubercles on the previous year's growth, which accounts for their interesting halo effect. It's imperative that the cactus is not exposed to prolonged dampness and sitting water. Never let your cactus sit in a dish of water. Lastly, make sure to fertilize during the growing season for the best results.

Repot as needed, preferably during the warm season. To repot Mammillaria, make sure the soil is dry before repotting, then gently remove the pot. Knock away the old soil from the roots, making sure to remove any rotted or dead roots in the process. Treat any cuts with a fungicide. Place the plant in its new pot and backfill with potting soil, spreading the roots out as you repot. Leave the plant dry for a week or so, then begin to water lightly to reduce the risk of root rot.

Learn more at How to Grow and Care for Mammillaria.

Origin

Mammillaria luethyi is endemic to Coahuila in Mexico.

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