Cephalocereus senilis ?

Cephalocereus senilis (Haw.) Pfeiff., Allg. Gartenzeitung 6: 142 1838. (Syn: Cactus bradypus Lehm.; Cactus senilis Haw.; Cephalocereus senilis f. cristatus (Mathsson) P.V.Heath; Cephalocereus senilis f. fasciatus P.V.Heath; Cephalophorus senilis (Haw.) Lem.; Cereus bradypus (Lehm.) Steud.; Cereus senilis (Haw.) Salm-Dyck ex DC.; Echinocactus senilis (Haw.) Beaton; Echinocactus staplesiae Tate; Euporteria senilis (Phil.) Kreuz. & Buining; Pilocereus senilis (Haw.) Lem.; Pilocereus senilis var. cristatus Mathsson) ?;

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Cactus For ID : Nasik : 050714 : AK-9 : 5 posts by 2 authors. Attachments (1).
Seen at a Cactus Nursery in Nasik on 27/2/14.
Very small, cultivated.

This could be Mammillaria decipiens subsp. camptotricha, Bird’s Nest Mammillaria. Just a guess.

If the sides of this looks the same as the top and the “hair” is stiff and coarse, then it is Cephalocereus/ Pilosocereus senilis, nice columnar of Mexico called the Old Man of Mexico.

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References: The Plant List Ver.1.1  GRIN  Wikipedia  IUCN Red List (EN)   Dave’s Garden