Nuphar subintegerrima f. rubrotincta (Casp.) Makino
Nuphar japonica, known as East Asian yellow water-lily,[2] is a perennial,[3] aquatic, rhizomatous,[1] herb[4] in the family Nymphaeaceae native to Japan, Korea, and Russia.[1]
Nuphar japonica is one of three species in the genus Nuphar that is dispersed in the same geographical location of the Saijo Basin, an area in the Hiroshima Prefecture of Japan.[5]
Description
Vegetative characteristics
Nuphar japonica is a perennial,[3] aquatic, rhizomatous,[1] herb[4] with 1–3 cm thick rhizomes.[6][7] The leaves are submerged,[8][4] floating, or emerged.[7] The leaf blade is 12–35 cm long, and 6–18 cm wide.[6] The terete petiole[9] is 3–10(–14) mm wide.[7]
Generative characteristics
The yellow to red,[3] solitary,[4] 4–5 cm wide flowers[10] have a long, cylindrical peduncle.[4] The flowers have five sepals[11] and 10–18 petals.[12] The gynoecium consists of 15–16 carpels.[11] The 2–3.5 cm long,[7] and 1.6–2.3 cm wide, urceolate, green, long-necked fruit[6] bears ovoid seeds.[7]
^ abcCandolle, Augustin Pyramus de. (1818). Regni vegetabilis systema naturale, sive Ordines, genera et species plantarum secundum methodi naturalis normas digestarum et descriptarum (Vol. 2, p. 62). sumptibus sociorum Treuttel et Würtz. https://www.biodiversitylibrary.org/page/39511900
^Wilstermann-Hildebrand, M. (n.d.). Nuphar - Mummeln oder Teichrosen. Heimbiotop. Retrieved February 1, 2025, from https://heimbiotop.de/nuphar.html
^Tannins and Related Compounds. LXXV. : Isolation and Characterization of Novel Diastereoisomeric Ellagitannins, Nupharins A and B, and Their Homologues from Nuphar japonicum DC. Chemical & Pharmaceutical Bulletin, 25 January 1989, volume 37, issue 1, pages 129-134 (abstract)
^Tannins and Related Compounds. LXXIX. Isolation and Characterization of Novel Dimeric and Trimeric Hydrolyzable Tannins, Nuphrins C, D, E and F, from Nuphar japonicum DC. Chemical & Pharmaceutical Bulletin, 25 June 1989, volume 37, issue 7, pages 1735-1743 (abstract)