Article (magazine)  (2014)  Page(s) 231.  
 
Within the section Paeonia, four Caucasian species are cited as yellowish to yellow - P. wittmanniana, P. macrophylla, P. mlokosewitschii and P. tomentosa. The flowers of P. wittmanniana and P. macrophylla start off white or very pale yellow. P. tomentosa remains an enigma for authors but is probably white-flowered. Only P. mlokosewitschii, described from Lagodekhi National Park in East Georgia, has pale lemon yellow flowers.

Book  (2007)  Page(s) Vol. II, p. 39.  Includes photo(s).
 
Paeoniaceae (Şakayıkgiller), Paeonia whitmanniana (Beyaz ayıgülü; Beyaz şakayık), Peony. 5 petals. to 1.0 m. North-eastern Turkey. Mountains, meadows, green slopes, rocky areas. 2000-2400 m. June. Perennial woody plant.

Article (magazine)  (2003)  Page(s) 145.  
 
KEY TO SUBSPECIES OF P. DAURICA
1 Leaflets villose and (or) pilose on lower surface or glabrous; oblong or elliptic-oblong; apex rounded, acute to acuminate.
2 Petals yellow or yellowish white, but sometimes red at periphery or with a red spot at base: leaflets always villose or pilose.
3 Carpels and follicles tomentose.
4 Leaflets usually sparsely villose ........ssp. wittmanniana (Hartwiss ex Lindley) D. Y. Hong
3 Carpels and follicles glabrous or nearly glabrous
5 Leaflets usually sparsely villose .......................ssp. wittmanniana (Hartwiss ex Lindley) D. Y. Hong

Article (magazine)  (2003)  Page(s) 140.  Includes photo(s).
 
Flowers of P. wittmanniana were previously described as yellow by all the previous authors; however, one individual (Tbilisi Botanical Garden, from Abchasia, type locality) showed a red spot at the base (Fig. 4).

Article (magazine)  (2003)  Page(s) 146.  
 
Paeonia daurica ssp. wittmanniana (Hartwiss ex Lindley) D. Y. Hong, stat. nov. = Paeonia wittmanniana Hartwiss ex. Lindley in Bot. Reg. 32: t 9. 1846....Paeonia abchasica Miscz. ex Grossgeim, Fl. Caucas. 2: 92. 1930;.....This subspecies is found in north-western Georgia (Abchasia, Imereti, Megrelia, Ratsha-Letskhumi and Svaneti) and the adjacent region of Russia (upper reaches of the Mzymta River). It grows in deciduous forests and alpine or subalpine meadows at altitudes of 1000–2300 m. All the available records of herbarium specimens show that it is confined to the limestone areas. Although we were unable to visit localities of this subspecies due to security considerations, a large number of herbarium specimens and live individuals in the Tbilisi and Bakuriani Botanical Gardens in Georgia show that leaflets in this subspecies vary from glabrous to sparsely villose and/or pilose..., carpels from one to three in number and from glabrous and sparsely villose to tomentose, and petals from yellow to yellow with a pink spot at the base. The entity is not sufficiently distinct to allow recognition specific status. This subspecies was reported to be a tetraploid with the chromosome number 2n = 20

Book  (Jan 1999)  Page(s) 32.  
 
Paeonia macrophylla is like P. wittmanniana with larger leaves of darker green, and white flowers tinged with yellow... a close relation of P. mlokosewitschii and similar in appearance but the leaves are lighter green and the flowers paler yellow, sometimes white. The seeds are bright coral red... A letter in the Journal of Botany (London) in 1842 reported its introduction via Count Worontzov's garden at Adsharia near Erzerum in the Crimea... Lemoine crossed it with Chinese varieties to produce early-flowering peonies with large, fragrant single flowers in white, yellow, rose and salmon, with thick, luxuriant leaves such as 'Avant Garde', 'Le Printemps', 'Mai Fleuri' and 'Messag

Book  (1958)  Page(s) 206.  
 
But for the intervening Paeonia emodi and P. wittmanniana, Paeon would itself be fully disconnected between Southwestern China and the approaches of the Caucasus/Mediterranean

Book  (1917)  Page(s) 229.  
 
Wittmaniana (Wittman's). Caucasus. See p. 98.
 

Book  (1917)  Page(s) 30.  
 
P. Wittmaniana (Wittman's)—A pale yellow peony. Discovered in the Caucasus about 1842. One of the parents of the desirable Wittmaniana hybrids.
 

Book  (1917)  Page(s) 107-108.  Includes photo(s).
 
The season of P. tenuifolia is closely follolowed by that of the Wittmaniana hybrids which bloom early in May, nearly a month ahead of the Chinese varieties. The original Wittmaniana species was probably named after Wittman, a botanist who travelled in the Caucasus. The details of its introduction are shrouded in mystery, a fact which is the more remarkable because of the novel colour of the flower—yellow. It is first mentioned in the Journal of Botany (London), for 1842, where a letter is quoted which shows that, together with other rare plants, it had been received in a garden in the Crimea, from Count Worontzoff in Adsharia, not far from Erzerum. Subsequently this species was lost for a number of years, but was rediscovered about 1880 in an obscure Irish garden. The suggestion has been made that the American Peony Society commission some horticultural Arsene Lupin to unravel the mysteries of Wittmaniana's appearance, disappearance and re-appearance.
The flower is single with large firm petals of a colour well described as " light primrose with a dash of lemon." The seeds are a bright coral red. This type species is not grown here very successfully ; for some inexplicable reason it often dies out.