This clustering cactus has slightly elongated stems up to 60mm (2⅜in) wide and is covered in prominent tubercles. The whitish thread-like spines form an intricate cover over the plant and the diurnal yellow funnel-shaped flowers appear in summer.

Hardiness zones 10 to 11 

Mammillaria baumii is naturally found in North America growing in Tamaulipas Mexico in semi desert regions on very well drained moderately fertile stony soils with added leaf mould. It prefers a semi shaded to full sun open position with a minimum temperature of 10ºC (50ºF) and is drought tolerant but frost tender. 

This Pincushion cactus is grown for its flowers and clumping habit. It is planted in small or cactus and succulent gardens as a specimen. It is suitable for coastal or inland regions and used in rockeries or roof gardens establishing from division in 1 to 2 years and may be used as an indoor plant. ID 2086

Mammillaria (măm-i-LAH-ree-a) baumii (bah-YOO-mee)

Cactaceae (kak-TAY-see-ee)