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Phragmipedium ×richteri Röth & O. Gruß
in Die Orchidee, 45(3): U4 (Back cover) (1994).
Synonyms :
Phragmipedium pearcei hort. non (Reichenbach fil.) Rauh & Senghas in D.E. Bennett & E.A. Christenson, Icones Orchidacearum Peruvianum: pl. 153 (1993), nomen nudum.
Phragmipedium sp. - natural hybrid Bennett & Christenson in Icones Orchidacearum Peruvianum: pl.153 (1993).
Phragmipedium boissierianum var. minor hort. in Die Orchidee, 49(3): 144 (1998), nomen nudum.
Phragmipedium amazonica hort. , nomen nudum.
Phragmipedium amazonicum hort. , nomen nudum.
Phragmipedium peruviana hort. non Phragmipedium peruvianum Christenson , nomen nudum.
Phragmipedium topperi hort. , nomen nudum.

Phragmipedium richteri Röth & O. Gruß in Die Orchidee, 45(3): U4 (Back cover) (1994). - This taxon is by some considered a true species.
Type(s) :
Etymology : This natural hybrid is named in honour of Dr. H.C. Walter Richter (1904-1997) from Crimmetschau, Sachsen, Germany, who was the most well known orchid grower of the former D.D.R. (East-Germany). He celebrated his 90th birthday in the same year as the description of this natural hybrid.
Description
Plant :
Leaves :
Inflorescence : The inflorescence of strong older plants is branched. The flowers open successively.
Flower : The tepals are smooth at the outside, at the top with short downy hairs. The lip is at the margin of the lip opening covered with short hairs. The staminode is diagonally elliptic with a small point sticking out at the lower edge. The upper and side margin is covered with short bristly hairs, the lower edge has some short hairs.
Habitat :
Distribution : Peru.
Flowering Season : In Peru this species flowers from July until September.
Chromosomes :
History : Since about 1985 as well in the U.S.A. as in Europe plants with the name Phrag. topperi were available. One such plant was owned by Franz Glanz from Unterwössen, South Bavaria, Germany, for more than five years. This plant was the basis for the description by Jürgen Röth and Olaf Gruß in Die Orchidee in 1994. Both authors did not know at first if this was a natural hybrid with Phrag. pearcei or that it was a new species. However all the plants that were in cultivation in Germany under that same name showed in every detail, especially the flower, that they were similar to the plant in Unterwössen. That made the authors decide to describe it as a new species. Only after the official publication the authors came in the possession of details about the natural habitat of these plants, and it confirmed their opinion that it was a species and not a natural hybrid.
Already in 1993 D.E. Bennett and E.A. Christenson described and depicted this species as a natural hybrid of the genus Phragmipedium in ]Pu]Icones Orchidacearum Peruvianum
, Plate 153, without making an official description. This plant was said to be found by J. Schunke V. at 2 August 1985 in Peru, San Martin, District La Banda de Shilcayo, km 20 of the road from Tarapato to Yurimaguas. The plants grew at an altitude of 600 m in moist forests of the mountainous rainforest.
Comments : For quite some time now there is still a discussion going on about the nature of the taxon 'richteri'. Some say it's a species. Others consider it to be a natural hybrid of the species Phrag. pearcei and Phrag. boissierianum.
In Sander's List of Orchid Hybrids. Supplement (April-June 2018) the registrar writes: “Phragmipedium x richteri previously treated as a species. WCSP treats it as the hybrid Phrag. boissierianum x Phrag. pearcei, a concept that includes Phragmipedium x merinoi O. Gruss, which could be treated as a nothovar.