Book  (Apr 1999)  Page(s) 556.  
 
Heinrich Conrad Söth Lambertiana. Peter Lambert 1919

Book  (Apr 1993)  Page(s) 239.  
 
Heinrich Conrad Soth Shrub, light rosy red, with white eye, single, 1919, 'Geheimrat Dr. Mittweg' x R. foetida bicolor; Lambert, P. Description.

Book  (1939)  Page(s) 9.  
 
Geheimrat Dr. Mittweg. pink, Kommerzienrat W. Rautenstrauch, similar to the prior, but somewhat larger blooms, and Heinrich Conrad Söth. the most magnificent of the year.

Website/Catalog  (1938)  Page(s) 17.  
 
Repeating climbers. Lambertianas. Heinr. Conrad Söth (P. Lambert 19). Vigorous, 1 1/2 - 2 m., hardy. Glossy foliage. Fragrant, blooms at the end of the canes in large pyramidal bouquets. Single, bright deep pink with white eye. Continuous bloom, magnificent ornamental, hedge and park rose.

Book  (1937)  Page(s) 50.  
 
Heinrich Conrad Söth Hybrid multiflora. (Geheimrat Dr. Mittweg X Austria lutea),

Book  (1936)  Page(s) 671.  
 
Söth, Heinrich Conrad (multiflora, Lambertiana) Lambert 1919; Geh. Sr. Mittweg X Austrian Yellow; bright pink, center white, small, single, broad clusters of 10-70, fragarnce 5/10, floriferous, continuous bloom, good autumn bloom, long stems, growth 7/10, upright, 1-2 m., hardy. Sangerhausen

Book  (1933)  Page(s) 184.  
 
HEINRICH CONRAD SOTH. P. Lambert, 1919. Another Lambertiana with rosy red flowers, white in the center. Good autumn bloomer.

Website/Catalog  (1931)  Page(s) 31.  
 
Konrad Heinrich Söth, cherry-red, repeats, July ... 0,80 Marks [10] 7,20 [100] 64,--

Book  (1930)  Page(s) 395.  
 
Heinrich Konrad Söth. (P. Lambert 1919.) Semi-climbing hybrid Polyantha. Geheimrat Dr. Mittweg x Austria lutea.
Small, single, bright pink with white eye, fragrant, in large, dense, pyramidal trusses. Shrub up to 2 m tall, upright and bushy, with beautiful, large, healthy, glossy dark green foliage, quite hardy, blooming almost continuously from June to frost. Effectful as solitary shrub, pre-shrub, hedge or also as bouquet for vase.

Website/Catalog  (1929)  Page(s) 61.  
 
Lambertiana Roses
A class of Roses new to this country, originated by Peter Lambert of Germany. They tend to be shrubby climbers which bloom more or less frequently during the season. Valuable as strong shrubs and most interesting as a step forward in Rose progress. Following varieties are $1.50 each
Heinrich Conrad Söth. (P. Lambert, 1919.) Shining, dark pink flowers with white centers, in pyramidal trusses. Growth strong, up to 6 feet.
A good hardy shrub with a long period of bloom. (Geheimrat Dr. Mittweg X Rosa fœtida.)