Primula sieboldii, the Japanese primrose, is a species of primrose that is endemic to East Asia. The species goes by common names such as Siebold's primrose, cherry blossom primrose, Japanese woodland primrose Snowflake, Geisha girl, Madam butterfly and the Japanese primrose which also applies to the related species Primula japonica.
The plant is perennial with fibrous roots. Its leaves are arranged into a rosette while its petiole is hairy and is 3.5–12 centimetres (1.4–4.7 in) long. It has an ovate blade that is also hairy, but is cordate at the base and is both crenate and round at the apex. The species have 10–25 centimetres (3.9–9.8 in) tall scapes and have an inflorescence which has an umbel of 5-15 flowers. The sepal is bell-shaped and is 0.7 centimetres (0.28 in) long with spreading lobes that are lanccolated.
- Christophe Wiart (2012). Medicinal Plants of China, Korea, and Japan: Bioresources for Tomorrow's Drugs and Cosmetics. CRC Press. p. 306. ISBN 978-1-4398-9911-3.
- Jodie Mitchell; Lynne Lawson (2016). The Plant Lover's Guide to Primulas. p. 134. ISBN 9781604696455.
- John Richards (2002) . Primula. Pavilion Books Company Ltd. p. 232. ISBN 978-1-8499-4241-6.
- "Primula sieboldii". www.rhs.org. Royal Horticultural Society. Retrieved 17 February 2021.