After leaving Hermosillo we made a couple of stops on the way to San Carlos Bay. At the first there were lots of columnar cacti, and the first of many hooked spined Mamms:
And at the second, much the same. But as we drove towards Bahia San Carlos, little did I know what was awaiting:
Initially on the lower slopes, M. sheldonii and M. johnstonii.
A white radial spines M. sheldonii
A curly spined M. johnstonii - the form that is often called fma San Carlos
A straight spined form of M. sheldonii - these were surprisingly common on this site.
Typical form of M. johnstonii - since both forms occur at San Carlos, there is no sense in maintaining that fma suffix.
Close up of flower of M. johnstonii
A view of the bay from up on the hill.
Up at the top of the hill, broken rocky slabs, with M. boolii living in the cracks.
M. boolii was quite variable, some central spines being thin and lighter brown
and others being thick and darker. Does this shed any light on whether M. boolii and M. insularis should be separate species??
We then drove on towards Guasimas, and found a wild open area which had lots of plants. Among them were two Mamms.
M. sheldonii again, darker spined form
Close up of the dark spines
And M. bocensis with pale flowers. Some plants made really big groups, others were solitary.
A general view of the site - you can see at leats three clumps of M. sheldonii there.
We then tried unsuccessfully to find Mammillaria yaquensis, but in each place we tried, we were unsuccessful because the whole coastal region seemed to have been turned over to agriculture. After a couple more stops, in which we only found Mammillaria sheldonii again (but large groups of other plants!), we headed on to try to find Mammillaria sonorensis. We eventually gave up because the light was fading fast, and got to the hotel rather late. But tomorrow was another day!!