|Buining & Brederoo|
Micranthocereus auriazureus has a shrubby growth with columnar, light blue shoots and reaches heights of up to 1.1 meters. The shoots have a diameter of 6 to 7 centimeters. There are 15 to 18 rounded ribs provided which are furrowed wavy and something in hump are divided. The golden yellow areoles turn gray with age. From them arise numerous radiating, 10 to 13 millimeters long, dark golden yellow thorns , which become light yellow with age. They are difficult to distinguish between central and radial spines. The barely developed cephalium consists of plenty of wool.
The cylindrical flowers are bright lilac or orange- pink and open at night. They are up to 2.5 centimeters long and have a diameter of 1.1 centimeters. The berry-like, light pink fruits have a diameter of 14 to 16 millimeters and a length of 18 millimeters.
Systematics, distribution and endangerment
- Edward F. Anderson : The Great Cactus Lexicon . Eugen Ulmer KG, Stuttgart 2005, ISBN 3-8001-4573-1 , p. 432 .
- Cactus and Succulent Journal . Volume 45, Number 3, Los Angeles 1973, pp. 120-123.
- Micranthocereus auriazureus in the endangered Red List species the IUCN 2013 Posted by: Taylor, NP, Machado, M., Brown, P. & Zappi, D., 2013. Accessed October 22, 2015.