Origin and Habitat: Portillo Nejapa, Oaxaca (Mexico, Northern America)
Altitude range: 1100-1500 metres above sea level.
Habitat and ecology: It is often found growing together with Nyctocereus chontalensis.

• Mammillaria pullihamata Repp.

• Mammillaria rekoi (Britton & Rose) Vaupel
• Ebnerella rekoi (Britton & Rose) Buxb.
• Mammillaria rekoiana R.T.Craig
• Neomammillaria rekoi Britton & Rose
• Mammillaria albrechtiana Wohlschl.
• Mammillaria krasuckae Repp.
• Mammillaria mitlensis Bravo
• Mammillaria pullihamata Repp.
• Mammillaria rekoi var. pseudorekoi (Boed.) R.T.Craig
• Mammillaria pseudorekoi Boed.
• Mammillaria sanjuanensis Repp.

• Mammillaria rekoi subs. aureispina (A.B.Lau) D.R.Hunt
• Mammillaria aureispina (A.B.Lau) Repp.
• Mammillaria rekoi var. aureispina A.B.Lau

• Mammillaria rekoi subs. leptacantha (A.B.Lau) D.R.Hunt
• Mammillaria leptacantha (A.B.Lau) Repp.
• Mammillaria rekoi var. leptacantha A.B.Lau

Description: Mammillaria pullihamataSN|13417]]SN|13417]] is a provisional name (nom. inval.) published without Latin description by Backeberg Mammillaria rekoiSN'>13403]SN|13403]], but has always strongly hooked central spines (while in M. rekoi sometimes the central spines may be straight).
Habit: Solitary or cespitose in cultivation Mammillaria pullihamataSN|13417]]SN|13417]] starts clustering at about 3 to 5 years old from seed. (while in its natural environment it is simple and rarely branches).
Stems: Globose to short cylindrical, green, 12-15 cm high, 5-6 cm in diameter. Sometimes with latex.
Tubercles: Conical to cylindrical. (Tubercle arrangement: 8-13) Axil with short white wool and white bristles.
Areoles: Woolly when young.
Radial spines: About 20(-30), radiating, finely bristly, needle-like, white to golden yellow, 4 - 6 mm long.
Central spines: 4(-7), much stouter than the radials, yellow, amber or brown, hooked or sometimes straight, 10 - 15 mm long, the lower one sometimes strongly hooked.
Flowers: Deep purple pink to pink, with darker midribs, up to 15 mm long, stigmas greenish. The petals flare back at the ends, rather than opening widely.
Blooming season: Spring.
Fruits: Red.
Seeds: Brown.

Bibliography: Major references and further lectures
1) John Pilbeam (1999) “Mammillaria The Cactus File Handbook” Nuffield Press.
2) Edward F. Anderson “The Cactus Family” Timber Press, 2001

Cultivation and Propagation: It requires excellent drainage provided by porous cactus soil. We suggest repotting every 2-3 years. Prefers bright light and ample airflow. Outside full sun or afternoon shade, inside it needs bright light, and some direct sun. Water the soil abundantly when it is dry to the touch. Allow soil to drain thoroughly before watering again. Do not water much in the winter (Rot prone). Protect from frost. But it's hardy to -5°C if kept dry. During the beautiful season enrich the soil using a fertilizer rich in potassium and phosphorous, but poor in nitrogen, because this chemical element doesn’t help the development of succulent plants, making them too soft and full of water. Easily clustering, it's an easy bloomer. Most plants will offset readily, and clumps can be produced in a few years.
Propagation: Division, direct sow after last frost.