Scientific Name
Mammillaria theresae Cutak
Synonym(s)
Cochemiea theresae, Mammillaria saboae var. theresae
Scientific Classification
Family: Cactaceae
Subfamily: Cactoideae
Tribe: Cacteae
Subtribe: Cactinae
Genus: Mammillaria
Origin
Mammillaria theresae is native to Mexico. It occurs on limestone outcrops in Corneto Pass in the state of Durango.
Description
Mammillaria theresae is a charming small cactus with subglobose to cylindrical, usually solitary or sparingly clustered stems covered with short, white to yellowish-white spines. The stems are green with a red or magenta hue. They can grow up to 2 inches (5 cm) tall and 1.2 inches (3 cm) in diameter.
The flowers are funnel-shaped, pink with pale yellow stigmas, and can reach up to 2 inches (5 cm) in length and 1.4 inches (3.5 cm) in diameter. They appear mainly in spring but also sporadically throughout summer. This species has cryptocarpic fruits, meaning fruit and seeds are produced and retained inside the stems. They are club-shaped and can measure up to 0.4 inches (1 cm) long.
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 expand to allow for increased water storage. The flowers appear from these tubercles' axils on the previous year's growth, which accounts for their interesting halo effect. The cactus mustn't be exposed to prolonged dampness and sitting water. Never let your cactus sit in a dish of water. Lastly, ensure to fertilize during the growing season for the best results.
Repot as needed, preferably during the warm season. To repot Mammillaria, ensure the soil is dry before repotting, then gently remove the pot. Knock away the old soil from the roots, removing any rotted or dead roots. Treat any cuts with a fungicide. Place the plant in its new pot and backfill it with potting soil, spreading the roots as you repot. Leave the plant dry for a week or so, then begin to water lightly to reduce the risk of root rot.
See more at How to Grow and Care for Mammillaria.
Forms
Links
- Back to genus Mammillaria
- Succupedia: Browse succulents by Scientific Name, Common Name, Genus, Family, USDA Hardiness Zone, Origin, or cacti by Genus
Photo Gallery
Click on a photo to see a larger version.
