Magazine  (1826)  Page(s) 44.  
 
....purpurea maxima, with large purple-red bluish rose....

Book  (1820)  Page(s) 117.  
 
purpurea maxima ...4 Gr.

Book  (1817)  Page(s) 428.  
 
7734. purpurea maxima, largest semi-double, purple-coloured rose. Wr. [Wrede]

Magazine  (1815)  Page(s) 201.  
 
Newest Rose Classification of Mr. Wrede of Braunschweig...
111 Rosa purpurea maxima, grösste Purpurrose, smpl. gdfl. (4 gGr [Gutegroschen]), light purple; flat.
3. [some sepals with some without appendages, no leaflets at top] 11. [pedicels with glandular hair] 19. [light green wood] 40. [small straight and curved prickles]  99. [light brown prickles] 127. [medium sized foliage] 131. [elongated ovoid foliage] 178. [not deeply serrated] 192. [yellowish green foliage] 199. [pale green reverse] 216. [prickles under the petioles]

Website/Catalog  (1814)  Page(s) 25.  
 
Third order in the fourth class; ovaries with glandular hair or bristles.
111 Rosa purpurea maxima, grösste Purpurrose, smpl. [semiplena] gdfl. [grandiflora] (4 gGr [Gutegroschen]), light purple; flat.
3. [some sepals with and some without appendages] 11. [glandular pedicels] 19. [light green wood] 40.[small straight and curved prickles] 99. [light brown prickles] 127. [large foliage] 131. [elongated-ovoid foliage] 178. [not deeply serrated] 192. [yellowish green foliage] 199. [pale green reverse]  216. [prickles below the petioles]

Magazine  (1806)  Page(s) XLVI.  
 
Rosen-Sträuche, welche selbst erzogen und im Frühjahre und Herbste 1807 und Frühjahre 1808 verkauft werden von dem Handelsgärtner Ernst Christian Conrad Wrede, wohnhaft neben der Petrikirche in Braunschweig.

Translation:
Rose bushes which were grown by myself and will be sold in spring and autumn 1807 and spring 1808 by the nurseryman Ernst Christian Conrad Wrede, resident beside the church St. Peter in Braunschweig. 
Third order in the fourth class; ovaries with glandular hair or bristles ....

111 Rosa purpurea maxima...grösseste [largest] ....6 ggr [Gutegroschen]

Book  (1805)  Page(s) 21.  
 
List of plants at Wilhelmshöhe...
Grosse Purpurrose. Rosa purpurea maxima.

Website/Catalog  (1805)  Page(s) 10.  
 
Verzeichniss derer verkauft werdenden Rosen.
2 Rosa purpurea maxima. Grosse Purpur-Rose.

Website/Catalog  (1786)  Page(s) 54.  
 
Rosa purpurea maxima.

Book  (1779)  Page(s) 268.  
 
169. Rosa purpurea maxima (die grösste Purpur-Rose.)