Mammillaria herrerae
Mammillaria herrerae
Mammillaria herrerae is a species of the genus Mammillaria in the cactus family ( Cactaceae ). The specific epithet honors the herrerae Mexican biologists and naturalists Alfonso L. Herrera (1870-1942), who founded in 1923 the zoological garden of Chapultepec.
Description
Mammillaria herrerae grows singly or sprouts at the base. The spherical shoots reach a diameter of 2 to 3.5 centimeters. The cylindrical, truncated at the top warts are close together. They contain no latex. The axillae are bald. Central spines are not present. The 100 or more bristle-like, white or gray spines are unequal, horizontal radiating and interwoven. They are 1-5 millimeters long.
The pink flowers reach a length of 2 to 2.5 centimeters. The small, almost spherical fruits are whitish and blackish contain brown seeds.
Distribution, systematics and hazard
Mammillaria herrerae is common in the Mexican state of Querétaro.
The first description was in 1931 by Erich Werdermann. Synonyms are Chilita herrerae ( Werderm. ) Buxb. (1954, nom. Inval. ICBN article 33.3), Escobariopsis herrerae ( Werderm. ) Doweld (2000) and Mammillaria herrerai Fric (1924, nom. Inval. ICBN Article 32.1c ).
Mammillaria herrerae is on the Red List of Threatened Species IUCN as " Critically Endangered (CR ) ', ie threatened with extinction, classified.