Echeveria elegans var. tuxpanensis Walther, 1972

Note :

Walther described this variety from specimens determined as “Echeveria turgida Rose, sp. nov,” with Rose's n° 962, collected "on rocks in cañon near Tuxpan, Jalisco, Mexico". This information is clearly wrong, because E. turgida is native to Coahuila, not to Jalisco. Instead of realising that the specimens were correctly identified and that only the locality was wrongly indicated, Walther claimed that the locality was correct and that the specimens represented a new species which he went on to describe as E. elegans var. tuxpanens, designating the cotype of E. turgida as type of it. This is pure nonsense. The specimens are cotypes of E. turgida Rose and are a perfect match for the type. Conclusion : An E. elegans var. tuxpanensis has - except as Walther's construction - never existed, it is a phantom.

When F. Otero collected an apparently unknown Echeveria at Tuxpan, Michoacán, Uhl speculated that this might be Walther's var. tuxpanensis, suggesting that Walther's locality Tuxpan, JALISCO, in fact was Tuxpan, MICHOACAN. Meanwhile the plants from Michoacán are well known and distributed under the invalid name E. 'Pinwheel'. 

Instead of speculating about the correctness of Tuxpan, Jalisco,  it would have made much more sense to verify Walther's claim, i.e. to verify the identity of the cotype specimens ….