Picture of the has been licensed under a GFDL
Original source: Own work
Author: Michael Wolf
Permission: GNU Free Documentation License

Mammillaria guelzowiana

From Durango Mexico, Mammillaria guelzowiana is a sometimes clumping cylindrical cactus to 6 inches tall and 3 inches across. Which makes this one pretty much full grown. It has some of the largest magenta flowers of all the Mammillarias at nearly 3 inches in diameter. They come in flushes of several at a time in late spring. This came from B&B Cactus Farm loaded with buds. It didn't quit flowering till late June. More