Historical data around Astrophytum coahuilense (MÖLL.) KAYS.
1911 J. A. PURPUS reports about discoveries of his brother Carl in Mexico in the "Monatsschrift für Kakteenkunde" backdating for the year 1904 partly. He found a "white" form of the "bishop's mitre" besides many other new succulents in Coahuila, whose "green" form is already known since 1839 from the state San Luis Potosi.
1911 R. MEYER describes Myriostigmas with red throated flowers in the same periodical like J. A. PURPUS from the collection GRÄSSNER, Perleberg.
1922 OCHOTERENA mentions a Myriostigma which shall grow at Monterrey. This only can be the coahuile "bishop's mitre". However, no collector has found it there ever.
1927 Intersection trials by H. MÖLLER between the two forms of the bishop's mitres fail. He describes the form from the north as Echinocactus myriostigma subsp. coahuilensis, because flowers, fruits and seedlings differ fundamentally of the form in San Luis Potosi.
1932 Recombination of the sub-species to the species "Astrophytum coahuilense" by K. KAYSER published in the magazine "Der Kakteenfreund" Original description.
1944 MEGATA repeated the intersection trials of the predecessors and regards the Coahuilense as an own species. He wants to give this the name Astrophytum albissimum later.
1974 C. GLASS & R. FOSTER confirm the statement of Carl PURPUS by a location photo that Astrophytum capricorne v. senile and Astrophytum coahuilense live together in one area. (the authors quote Astrophytum myriostigma v. coahuilense und Astrophytum capricorne v. minor).
1987 Field study of U. BERNHARD of Astrophytum coahuilense in the British Cactus and Succulent Journal.
all descriptions
Astrophytum coahuilense
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