Website/Catalog  (1926)  Page(s) 36.  
 
Repeat-flowering semi-climbers. 1.5 to 2.5 m tall.
Lambertiana Heinr. Conrad Söth (P. Lambert 1919). Vigorus, upright. 1.5 to 2 m, hardy. Glossy foliage. Fragrant, at the end of the canes, in large pyramidal bouquets. Blooms single, bright deep pink, with white eye. Continuous bloom, magnificent decorative and park rose.

Website/Catalog  (1923)  Page(s) 16.  
 
Rosa Lambertiana... Heinrich Conr. Söth (Lambert, 1920). Deep pink with white center. (Geheimrat Dr. Mittweg X Austria lutea).

Book  (1920)  Page(s) 136.  
 
Heinrich Conr. Söth. H. Poly. (Lambert, 1919.) Geheimrat Dr. Mittweg X Kapuziner Austria lutea. Bud small; flower small, single, borne in pyramidal clusters; fragrant. Color light rosy red, with white eye - resembles Leuchtstern, but redder. Foliage large, glossy dark green. A very vigorous grower of upright, bushy habit, and a continuous bloomer all season. Very hardy.