ID for this possible M. bocensis ?

From Sinaloa

Right State for m. bocencis and a nice spiny example.

The spines are curlier than I have seen, but the flower looks right, so yes, M. bocensis also is my view.

Incidentally, John Pilbeam in his new book describes it as porcupine like.

Hola DientebLanco,

I agree with bocensis, Reppenhagen described the central spines as upwards curved. I think the spination looks like this because of the barren and fullsun location and a long drought. The rainy season starts in Sinaloa just now.

Sent from Topic'it App

i doubt because of how diferent this form is compared with the northern and southern population.



also found many clumps of this, also bocensis, but some sort of caespitosus form?

Thanks a lot !

Where exactly in Sinaloa did you photograph these plants? This could help for identification.

Sent from Topic'it App

These are my habitat photos of what I believe to be Mammillaria bocensis.

Firstly from the ML741 location near Guasimas, 30m above sea level, Sonora.





and also just south of the Rio Piaxtla  in Sinaloa.





These photos are the reason that I was surprised at how curved the spines were on the OP's photos. I did spend some time looking at whether the plants from Guasimas might be M. sonorensis, as there is a fairly common white/cream coloured flowered form of this, but I have checked with several people, including John Pilbeanm and Wolfganga Plein, and they are in agreement about M. bocensis being the plants I saw there. The spines on the plants from the Rio Piaztla are longer than those at near Guasimas, but not curved that I can see from the photos.

So, it is clearly just part of natural variation, though my plants of Rog 231 (Rio Piaxtla), H.O. 170(not known where from) and Lau 772 - as rubida - (Cerro Culagua 100-500m, Sinaloa) do not show this character.It would be nice to have some with such spines - seed anyone??

Chris43, Thank you for the photos and information !
At first sight i thought it was a sort jhonstonii because of the curve spine, but the description fits to bocensis.

I collected a few fruits

mammillariamaniac, i found them at Topolobampo