Ferocactus lindsayi
A young specimen at the end of the winter rest.
 

Description: Solitary and very slow growing species.
Stem: At first globular then semi-cylindrical, 40 cm diameter, 60 cm tall. Epidermis is grey-green or purple-bluish (in full sun).
Spines: All Grey with a darker tip (almost black).
Radial spines: 7-8.
Central spines: 1 stronger and straight.
Flowers: Pale yellow

Cultivation: Very slow growing.  Use very draining soil, water during the aestival growth cycle (this plant needs regular water) But it is necessary to avoid  wetting the bodies of these plants while they are in sunlight. A wet cactus in the sun light can cause sun burning, which can lead to scars, or even fungal infections and death.
Needs full sun.  Keep dry at 10°C in winter, but it can tolerate sporadic light frost.

Reproduction: Seeds are the only way of reproducing.

Scientific name:   Ferocactus lindsayi Bravo 1966

Origin:  Mexico. Endemic to a restricted area in the lower part of the river Balsas between Michoacan and Guerrero.

Conservation status: Listed in CITES appendix 2.

Etymology:  This species has been named after the Ferocactus specialist George Lindsay, director of the "California Academy of Sciences".
 

This is the last discovered species of Ferocactus found only on 1964.
It is of extremely slow growth, hence very rare in cultivation and highly  prized by collectors.