Mammillaria sempervivi DC.
Schumann, K.M., Gesamtbeschreibung der Kakteen (1899)
Gesamtbeschr. Kakt.

(1899)
t. 95 p. 589
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name recognized (= name cited):
639699 Mammillaria sempervivi DC.

family: Cactaceae
subfamily: Cactoideae
tribe: Cacteae
epithet: sempervivi

Illustration contributed by:
Missouri Botanical Garden, St. Louis, U.S.A.
link to this page:
http://www.plantillustrations.org/illustration.php?id_illustration=121128
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homotypic synonyms:
Neomammillaria sempervivi (DC.) Britton & Rose;
heterotypic synonyms:
Mammillaria caput-medusae Otto; Mammillaria tetracentra hort. ex Salm-Dyck;
no full size  illustration available (3a)