''Mammillaria grusonii'' is a
cactus in the genus ''
Mammillaria'' of the family
Cactaceae. The epithet ''grusonii'' honors the inventor, scientist, industrialist and cacti collector Hermann Gruson of Magdeburg.
Description
''Mammillaria grusonii'' usually grows singly. This cactus is spherical to thick cylindrical, bright green, with a diameter of about . The tubercles are four-angled and contain latex. The axillae are initially woolly, later naked. The spines are straight, reddish and becomes white with age. The two central spines are 0.4 to 0.6 centimeters long, while the 12 to 14 radial spines are 0.6 to 0.8 centimeters long. The pale yellow, bell-shaped flowers are up to 2.5 centimeters long and have an equal diameter. The fruits are bright scarlet and contain brown seeds.
Distribution
This species can be found in
Mexico (in the states of
Coahuila
Coahuila (), formally Coahuila de Zaragoza (), officially the Free and Sovereign State of Coahuila de Zaragoza ( es, Estado Libre y Soberano de Coahuila de Zaragoza), is one of the 32 states of Mexico.
Coahuila borders the Mexican states of N ...
and
Durango
Durango (), officially named Estado Libre y Soberano de Durango ( en, Free and Sovereign State of Durango; Tepehuán: ''Korian''; Nahuatl: ''Tepēhuahcān''), is one of the 31 states which make up the 32 Federal Entities of Mexico, situated in ...
), at an altitude of above sea level.
References
*
Mammillarias.netDistribution MapCacti Guide
grusonii
Cacti of Mexico
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