Book  (1986)  Page(s) 179.  
 
Understocks...canina... 'Poulsen'

Book  (1976)  Page(s) 47.  
 
The selection of R. canina as understock for garden roses in the 20th century was carried out mainly in former Germany, partly also in France, Denmark and the Netherlands, and 20 forms were selected. The most well known are: R. c. 'Brögs Stachellose' (known since 1896), R. c. 'Deegens Canina' and 'Heinsohns Rekord' (since 1935), R. c. 'Kokulinsky', R. c. 'Kordes Inermis' (since 1943), R. c. 'Pfänder', R. x pollmeriana (since 1904), R. c. 'Poulsen', R. c. 'Schmids Findling' (since 1952), R. c. 'Schmids Ideal' (since 1912), R. c. 'Schmids Rekord' (since 1930), R. c. 'Senff' (since 1919), R. c. 'Succes' (since 1918).