The nectary forms a uniform ring surrounding a 4-loculed superior ovary.
Elżbieta Weryszko-Chmielewska 2014, 'The anatomy and ultrastructure of the nectaries and osmophores of water forget-me-not(Myosotis scorpioides L.)', Modern Phytomorphologyhttp://phytomorphology.org/PDF/MP6/06051051.pdf. Retrieved from DOAJ CC BY 4.0 (https://creativecommons.org/licenses/by-sa/4.0/legalcode)
Rhododendron japonicum develops the superior pistil with a 5-loculed ovary equipped in five ribs.
Elżbieta Weryszko-Chmielewska, Mirosława Chwil 2012, 'Micromorphology of the epidermis of the floral nectary of Rhododendron japonicum (A.Gray) J. V. Suringar ex E.H. Wilson.', Acta Agrobotanicahttps://pbsociety.org.pl/journals/index.php/aa/article/view/1740. Retrieved from DOAJ CC BY 4.0 (https://creativecommons.org/licenses/by-sa/4.0/legalcode)