old taxon....

i'ld like to have your suggestion on these plants.
i have found them in a little greenhouse near novara - italy...
mammillaria's catalog is full of old taxa.


i've never seen...
mammillaria atrosanguinea....



mammillaria acicularis




mammillaria xanthina



ingens green-flower
(mammillaria ingens is referred to m.polythele ssp obconella) ?????

I have a reference to M. atrosanguinea, as a plant described by Ehrenberg in Allgemene Gartenz 17,270 in 1849. Apparently there was no type preserved and the description was very brief. To me that plant looks like one of the many forms of m. spinosissima.

M. acicularis was descreibed even earlier, in 1839 by Lemaire, again no type and a brief description, in Cact. Gen. Nov. Spec. Mon. 34. I don't immediately recognise the plant in the photo, but I suspect it is something either from the rhodantha group or the standley group.

M. xanthina is an interesting plant, as according to Hunt, it has never been rediscovered. However, plants discovered by the Schumachers, and written up in the Loose Leaf collection of the German Mammillaria Society in 2007, were named as this species andlook right. I bought some seeds from a Czech grower and have some small seedlings. However the plant shown does not fit the description - depressed-globose stem, dull bluish-green, axils wioolly at first, radial spines 10-12, to 4m long, white, central spines 2, brownish and a little longer than the radials.

Your ingens=green flower is, I think, the white flowered form of M. zeilmaniana.

m.ingens green flowered was near this plant pink flowered....

and your suggestion about this green flowered m.gasseriana?

Maybe the pink flowered plant is close to M. jaliscana?

And the "green flowered gasseriana" is, I think, just a pale flowering M. stella-de-tacubaya, as the central spine slook quite strong. The flower colour does vary anyway.

i think that #4 could be mammillaria jaliscana with white-green and pink flowers.

in the nineties SB 1161 and SB 1164 were distribuited like m.gasseriana.

Yes, there was a lot of confusion between gasseriana, viescensis, stella-de-tacubaya and probably some others of the Lasiacanthae names.

I have a white flowered zeilmanniana and it looks just like #4.