Copiapoa atacamensis

Copiapoa atacamensis is a globose cactus, either solitary or clump-forming. Its stems are gray-green with a whitish bloom and are up to across with 12–16 ribs. Its overall appearance is very spiny. There is a single straight central spine to each areole, long, and five to seven more slender radial spines, long. The fragrant yellow flowers open widely and are long. They are followed by green to rose coloured fruits. it has a taproot which is considerably longer than the stem, which it uses for storing water. ==Systematics==

Copiapoa atacamensis was named by Harry Middleditch in 1980. The relationships among some of the species of Copiapoa are unclear . C. atacamensis has been treated as a subspecies of C. calderana under the name C. calderana subsp. atacamensis; alternatively C. calderana may be reduced to the variety calderana of C. atacamensis. Copiapoa boliviana is given as a synonym of C. atacamensis by some sources; ==References==