I’m on vacation, so a few of the entries to the end of February will be short. — Daniel.
I was pleased to see this little cactus in its natural form — somewhat different, I think you’ll agree, from the cristate growth morph posted a few years ago: Mammillaria elongata ‘Crest’.
Mammillaria elongata, commonly known as golden star cactus in English, is endemic to central Mexico, found only in the states of Querétaro, Guanajuato and Hidalgo. This was one of the first species to be featured on Cal’s Plant of the Week, over 10 years ago. Mammillarias.net has a description of the species as well as a number of other photographs.