Mammillaria wohlschlagerii Ignacio Allende Dur, MX
 

Description:  Plants are usually unbranched or slowly clustering, deep-seated in substrate, and inconspicuous.
Stems:  Flat-globular ,  1 to 3 cm high, 2.5 - 6 cm in diameter.
Axil: Naked.
Roots: Diffuse, not enlarged.
Radial spines: 26 - 36, glassy white, brown tipped, 2 - 6 mm long.
Central spine: Absent.
Flowers: 18 - 20 mm long, 16 - 18 mm in diameter, white or cream, usually with sharply defined midstripes of  tan-pink or brown,
Blooming season (Europe): From January to March
Fruits: Scarlet, cylindrical or clavate, 10-25 mm long, with floral remnant persistent, ripening in June August.

Photo of conspecific taxa, varieties, forms and cultivars of the Lasiacanthae group. (This taxon has lots of synonyms  whit several controversial varieties and subspecies)

• Mammillaria lasiacantha
• Mammillaria egregia (Syn: M. lasiacantha ssp. egregia)
• Mammillaria magallanii (Syn: M. lasciacantha magallanii)
• Mammillaria neobertrandiana (syn: M. lasiacantha)
• Mammillaria wohlslageri (Syn: M. lasciacantha subsp. hyaline)

Scientific name:  Mammillaria wohlschlageri Reppenhagen 1987

Origin:  Zacatecas, Mexico. Altitude 2.100 - 2.400 m.

Conservation status: Listed in CITES appendix 2.

Synonyms:  

• Mammillaria lasiacantha subsp. hyaline Glass & Foster
   Cact. Succ. J. (US) 42(3): 111, fig. 31 (1970)
• Escobariopsis lasiacantha subsp. wohlschlageri

This is one of the most beautiful species, with a flat fuzzy stem and creamy flowers blooming abundantly in late winter-to early spring.
 

Cultivation: This plant has not the fame to be easy to cultivate, but in good conditions with excellent ventilation, it grows without difficulty. It is especially sensitive to overwatering. So careful watering and an open mineral potting soil are a must. Avoid the use of peat or other humus sources in the potting mixture. Don't add limestone to the potting mix which must be moderately acidic. Can be sensitive to frost (but if dry they are resistant to -5° C). Requires maximum sun exposure to reach its full potential and  to achieve success in flowering. A winter rest that allows the plant to shrivel (perhaps losing up to 25% of its summer height) will encourage flowering and long time survival. Be careful to encourage slow growth. Provide very good ventilation.

Propagation: Direct sow after last frost. (it usually doesn't  produces offsets).