Magazine  (Nov 1911)  Page(s) 64.  
 
Isabella Karlitzky. "Dr. Bretonneau" (Verdier) often appears in the trade under the above name. The true variety is described in Bulletin 259, page 142.

Website/Catalog  (1910)  Page(s) 183.  
 
69 Pæonia albiflora Isabella Karlitzky. Gefüllt, hellkarmin, Mitte gelblichweiss durchzogen...100 Pf., 1 Stück

Magazine  (Nov 1908)  Page(s) 142-3.  
 
Isabelle Karlitsky
Species: P. albiflora. History: Originated by Guerin in 1858.
Description in brief: Full double, deep pink, midseason, good.
Description in detail: Rose type, staminodes next to guards narrower and some salmon tints. Well differentiated. No remnants of any kind. Color, solferino red 1(157) with the collar next the guards a little lighter, the very tips of petals a little lighter, giving a silvery appearance. Size, medium to large. Odor, pleasant XX. Foliage medium in size and color, smooth.

Website/Catalog  (1908)  Page(s) 3.  
 
DOUBLE HERBACEOUS PEONIES SERIES D. 60 cents each
Isabelle Karlitsky, (Guerin 1858) bright deep violaceous pink; magnificent.

Book  (1907)  Page(s) 120.  
 
1326. KARLITZKY, ISABELLA; P....(Guerin, 1858)
(1) 1858, Dessert's MSS.
(2) 1863, Revue Horticole, p. 293.
(3) Cornell Plots Nos.. 837, 838.

Book  (1904)  Page(s) 3.  
 
Double Herbaceous Paeonies. ...Series C. 75 cents each.
Isabelle Karlitzky. pink; fine.

Website/Catalog  (1903)  Page(s) 29.  
 
Herbaceous Peonies—Chinensis Varieties.
Isabelle Karlitzi. Large flower; carmine rosa.

Website/Catalog  (1895)  Page(s) 23.  
 
Barr's Hardy Double Chinese Pæonies.
Full Deep Roses. (Mostly rose-scented, all beautiful.)
Isabelle Karlitzky, carmine-rose, 1/-.

Website/Catalog  (1890)  Page(s) 30.  
 
Double Herbaceous Pæonies.
General Collection. All double varieties except otherwise stated.
Isabelle Karlitzky, white, red centre

Website/Catalog  (1890)  Page(s) 6.  
 
Herbaceous Pæonies, Double Varieties.
Isabella Karlitzky, glowing purplish-rose, a large and beautiful form, deliciously fragrant. 2/6.