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).

Book  (1976)  Page(s) 177.  
 
Botanical roses on the territory of the USSR, whose independence requires precising...
R. kalmiussica Chrshan. et Laseb. - according to Chrshanowskii most similar to R. corymbifera Borkh., differing by its form and height, by sharp prickles and several other characteristics; limited region. According to "Flora Europa" R. corymbifera Borkh.

Book  (1971)  Page(s) 375.  
 
R.corymbifera Borkh., Vers. Forstbot. Beschr. (1790) 319.— R. dumetorum Thuill., Fl. Paris ed. 2 (1798— 1799) 250. — R. c ollina Lam. et DC, Fl. Fr. ed. 3, IV (l805) 441. - R. taurica M. B., Fl. taur.-cauc. 1(1808)394; III (1819) 355. - R. solstitialis Bess. Primit. fl. Galic. V (1809) 324; Enum. pi. Pod. Volh. (l822) 19. - R.uncinella Bess., Enum. pi. Pod. Volh. (1822)20; M. B., Fl. taur.-cauc. Ill (l819) 349. - R. collina M. B., Fl. taur.-cauc. I (1808) 399; III (1819) 30. — R.saxatills Stev. n. M. B., Fl. taur.-cauc. Ill (1819) 348. — R. montanaR. friedlaenderiana Bess., Enum. pl. Pod. Volh. (1822)46, 63. - R. caucasica M. B., Fl. taur. cauc. 1(1808)40; (1819)351, non Pall. — R. c anina var. dumetorum Desv., Journ. bot. II (1813) 115; Rgl. in A. H. P., V, f . 2 (1878) 335.- R. arguta Muss.-Puschk. in Willd. herb, ex Crep. in Bull. Soc. Bot. Belg. XI (1872) 194, 335. — R. canina var. corymbifera Rouy, Fl. Fr. VI (1900) 314.- Ic: Willmott, Gen. Rosa, p. 397, pl.-Exs.: Fiori et Beguinot, Fl. ital. exs. No. 2075; HFR No. 2121-2125.
Shrub; plant similar to preceding species from which it is distinguished only by the pubescence of the leaves; prickles equal, hamate; leaflets 5—7, large, ovate, more or less pubescent on both sides, at least beneath where hairs are sometimes confined to veins, simple -dentate, teeth less prominent than in R. canina, rarely nearly bidentate, with 1—2 glands; petioles smooth or faintly glandular; stipules broadened. Flowers long-pediceled, medium-sized, white or pale pink, with lanceolate bracts; hypanthia, pedicels and lower side of sepals smooth, rarely with remote stalked glands; sepals recurved below, pinnate, often with foliate appendages; style heads pediceled, pubescent or glabrous; fruit ovoid, sepals persistent. June— July.
In same places as R .canina. — European part: central and southern regions; Caucasus: all regions; Centr. Asia: T. Sh., Pam.-AL, Mtn. Turkm. Gen. distr.: all Europe, N. Afr., Near Asia (As. Min. and up to Afghanistan). Described from Germany. Type not known (perhaps in Munster).

Magazine  (1970)  Page(s) 33.  
 
Rose rootstocks ... R. c. 'Schmids Ideal'

Book  (1964)  Page(s) 95.  
 
'Schmids Ideal' (Robert Schmid, Köstritz...

Magazine  (Feb 1951)  Page(s) 1. trimester, p. 25.  
 
[From the article "La Rusticité des Roses", by Wilhelm Kordes, pp. 24-27]
Suivant les avis des jardiniers, les roses greffées sur Rugosa hollandica devraient supporter les températures les plus basses par rapport à Canina Pfander, R. Multiflora, Heinsohns Rekord, Wadenswiler Canina, Senffs Canina, Schmids Ideal, Corriifolia frobelii, Rehder (Laxa, hort), et Inermis hort. (Gamon). Cet ordre d'énumération pourrait figurer, approximativement, la résistance respective des portegreffes, envers les rigueurs de l'hiver. 

Book  (1951)  Page(s) 110.  
 
Griffith J. Buck.  Varieties of Rose Understocks.
Schmidt's Ideal.  This is a typical Canina, but is adapted only to varieties similar to 'President Herbert Hoover'.  It has been discarded. 

Magazine  (Jul 1950)  Page(s) 3. trimester, p. 69.  
 
[From the article "Les Portes-Greffes du Rosier" by André Leroy, pp. 68-74]
Dans un récent rapport, WILHELM KORDES, le célèbre rosiériste allemand, l'obtenteur de Crimson Glory et de tant d'autres belles variétés, cite en leur attribuant des qualités particulières :
— et le Canina Idéal de Schmids (Schmids Ideal).

Book  (1946)  Page(s) 55.  
 
F. W. Sansome and Miss Joan Raby.  Identification of Rose Stocks.
Schmid's Ideal  Wood colour: dark green.  Colour: dull green.  Leaf size: medium 5-7 leaflets.   Leaf surface: dull, smooth.  Stipule margin: entire.  Stipule size: medium, long and narrow.  Prickles: 1, 2 or 3 per node.  Hairs: None. Glands: leaf margin, rachis stipules.  

Book  (1944)  Page(s) 18.  
 
George M. Taylor.  The Root Systems of Our Garden Roses.
The stocks now in general use, apart from the seedlings of R. canina which are used so indiscriminately are Brogs, Deegens, Jagerbataillon, Kokulensky, Senff, Schmidt's Ideal and Schmidt's Special.  They are all different strains of R. canina and were selected by Nurserymen in an endeavour to secure some attempt at uniformity.  It should be noted that these stocks are all of continental origin and are mainly from Holland.