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Mammillaria guelzowiana is a perennial plant that grows fleshy, globose, at first solitary and then forming groups. The stems have a spherical, apically depressed, about 7 inches tall and 4-10 inches in diameter. Tubercules are conical and cylindrical. They do not contain latex. The plant has 1-6 thin central spines, needle shaped, yellowish red, 8 to 25 millimeters long. The 60-80 radial spines are long and twisted, about 15 mm long. The bell-shaped flowers are purple, more or less bright, up to 4 inches long and can reach 7 inches in diameter. The fruits are almost spherical, bright red or yellowish white, about 8 mm in length.
Mammillaria guelzowiana at the Orto Botanico dell'Università di Genova
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- The plant list
- Cacti Guide
- Urs Eggli, Leonard E. Newton: Etymological Dictionary of Succulent Plant Names. Birkhäuser 2004
- Fitz Maurice, W.A. & Fitz Maurice, B. 2002. Mammillaria guelzowiana. 2006 IUCN Red List of Threatened Species. Downloaded on 22 August 2007.
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