A little later, but the flowers are just starting to open on this form of giselae
, sometimes known as fma albiflora.
When I acquired my giselae
plants, one was labelled as Clone E and was the more commonly found form, and one called Clone D which was this much paler flowered form, and one that grows a bit larger and is quite reluctant to offset.
The original seller of the plants couldn't trace his records of what these Clone D and E meant, and I eventually contacted the original discoverer of M. giselae
, Jose Guadalupe Martinez Avalos, who said "In habitat, amongst Mammillaria schiedeana subsp. giselae
there are some albino individuals which many authors include as a forma albiflora, but it is very common to see this colour in the field, so as far as I am concerned the classification of a albiflora form doesn't exist."
I bought them in November 1999, as small grafted plants, which wasn't very long after their first description in 1997. They nearly died in my winter 2000/2001 disaster, and all I could recover were a couple of very small offsets of each clone that was alive. These took a while to recover, and develop, and now are on their own roots.