(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.

(2014)  Page(s) 231-232.  
 
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. The most visited population shows a remarkable variation of pinks and yellows, as is also found in P. lagodechiana and P. x chameleon. Perhaps this is a result of P. mlokosewitschii mixing with P. caucasica (P. daurica subsp.coriifolia). Like most members of the section Paeonia, P. mlokosewitschii hybridises with its cousins so that plants grown from seed collected in the garden are liable to result in individuals with non-yellow flowers.

(2014)  Page(s) 232-233.  Includes photo(s).
 
P. mlokosewitschii is quite tall, reaching as much as 1 m in height....In gardens, P. mlokosewitschii is known as Molly-the-witch, but regrdless of this somewhat unfavourable nickname it is one of the loveliest and best tempered of herbaceous perennials. P. mlokosewitschii prefers vernally moist, humus-rich, well-drained soil. It tolerates most pH values but will not put up with waterlogging or drought.

(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.

(2014)  Page(s) 233-234.  
 
On July 17, 1975, Per Wendelbo and Mostafa Assadi drove up Kuhhaye Tales mountain ridge in Iran, from Asalem to Khalkhal, where they found a Paeonia species (18544) growing at 1,900-2,100m. Hong de-Yuan, in his monograph Peonies of the World (Kew), places this collection under P. daurica subsp. tomentosa. ....According to Hong De-Yuan, Paeonia tomentosa (P. daurica subsp. tomentosa) is known from several localities in four districts. The northernmost is in Talysh, in the vicinities of Lerik and Lenkoran, from where several gatherings are known....In Iran P. tomentosa has been registered at three sites...

(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.

(2014)  Page(s) 236-237.  Includes photo(s).
 
Paeonia wendelboi Rukšāns & Zetterlund species nova simila ad Paeonia tomentosa Lomakin et P. mlokosewitschii Lomakin sed differt floribus aureis, staturis monoribus (herbae ad 30 cm longas) et habitatione diverso.
Type: Iran: Azerbaijan: Asalem to Khalkhal, 2,000m, May 5, 1978. P. Wendelbo & M. Assadi 27809. Dominating the whole mountain slope. Obviously not eaten by sheep. Flowers sulphur yellow, stamens yellow, leaves glaucous. Holo: GB, Iso: TARI.

(2014)  Page(s) 234-236.  
 
...our team...made another stop at an altitude of 2,060-2,100m near sun-baked steep stony slopes facing south-west. These were sparsely covered with very dwarf and spiny shrubs and incredibly bright yellow peony in full bloom, growing in cracks in the rock. This was the species collected by Per Wendelbo and Mostafa Assadi (27809) [in 1978]. Its colour was so unusually deep yellow that at first glance Janis didn't believe it could be a herbaceous peony.
Compared with the white-coloured peonies in the vicinity, the leaves of the yellow-coloured plants were much more glaucous, with rounded segments and pubescence on the underside. In the white specimens, the leaves were darker green, distinctly pointed and acute.
This peony grows in full sun and is of dwarf habit, not exceeding 30cm in height while forming large flowers up to 7cm in diameter (in the wild).....This species turned out to be an excellent grower both in the garden and under cover.
A seedling of this yellow peony raised from...seeds was planted in the open garden by Janis. It survived several winters and flowered for the first time in June 2013. The weather consitions in Latvia are quite harsh and moist, unlike those in Iran, but it seems that this peony is very tolerant of low temperatures in winter and moist soil and humid air in summer and autumn. Although it received sufficient moisture and fertiliser, its height in the garden did not surpass 35-40cm....
In the trade this new species has been offered as P. mlokosewitschii, Paeonia sp. nova mlokosewitschii aff., and later as P. iranica, but we decided to name it Paeonia wendelboi after Per Wendelbo, who did much work for the fundamental Flora Iranica and who was the first to discover it.