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Denomination: 'Seiren'
Botanical Name: Ranunculus asiaticus x R. cortusifolius
Applicant/Holder: Ayaengei Co., Ltd.
880-1303, 3179-1 Minamimata
Aya-Cho, Higashimorokata-Gun
Breeder: Shuichi Kusano, Ayaengei Co., Ltd., Miyazaki, Japan
Agent in Canada: CPST Intellectual Property Inc.
Brookfield Place
181 Bay Street, Suite 2425
Toronto, Ontario
M5J 2T3
Tel: 647-478-2427
Application Date: 2017-11-20
Application Number: 17-9337
Grant of Rights Date: 2019-08-14
Certificate Number: 6010
Exemption from compulsory licensing: Yes
Expiry date for exemption from compulsory licensing: 2021-08-14
Grant of Rights Termination Date: 2039-08-14

Note: The applicant has requested an exemption from compulsory licensing to allow time to multiply and distribute propagating material of the variety. If the exemption is granted, it may be allowed for two years from the date rights are granted for the variety.

Variety Description

Variety used for comparison: 'Cypro Apricot'

Summary: The inner side of the petal of 'Seiren' is purple red while the inner side of the petal of 'Cypro Apricot' is orange. The anther of the stamen is yellow orange for 'Seiren' while it is dark brown for 'Cypro Apricot'.


PLANT: medium attitude, medium height, medium height foliage, broad, vegetatively propagated
TUBEROUS ROOT: small to medium sized

PETIOLE: short
CAULINE LEAF: medium number, short, narrow
CAULINE LEAF (UPPER SIDE): brown green (RHS 137A), medium degree of glossiness

FLOWERING STEM: medium number, medium length, medium thickness, very hollow in cross-section, brown green (RHS 137A), anthocyanin colouration present on basal part, many flowers
SEPAL: short, brown green (RHS 138A)
FLOWER: semi-double type, few petals, medium diameter
PETAL: type 1, medium length, narrow, medium to thick, incisions along margin present, weak undulation of margin
PETAL (INNER SIDE): medium degree of glossiness, very weak wrinkling, purple red (RHS 55B), more than one colour, main colour is pink with secondary colour yellow appearing as irregular stripes
PETAL (OUTER SIDE): light blue pink (RHS 56D)
STAMEN: yellow orange (RHS 21B)
STIGMA: violet (RHS N77B)

Origin & Breeding History: 'Seiren' originated from a cross made in March 2008 at Ayaengei Co., Ltd. in Miyazaki, Japan between Ranunculus asiaticus variety 'Shaun Rose', as the female parent, and an unspecified Ranunculus cortusifolius variety, as the male parent. From October 2008 to March 2009, resulting seeds were cultured and a specific line was selected based on flower size, stalk straightness, number of gathered flowers and growth rate. A secondary selection was made from October 2009 and March 2010 based on the same criteria. From October 2010 to March 2011, the lines selected in the secondary selection (3 strains per each selected line) were cultured and specific lines were selected based on the same criteria. From October 2011 to March 2012, the lines selected in the tertiary selection (7 strains per each selected line) were cultured, their properties confirmed and the new variety was named 'Seiren'.

Tests & Trials: The detailed description of 'Seiren' is based on the UPOV report of Technical Examination, application number 29972, purchased from the Plant Variety Protection Office of the Ministry of Agriculture, Forestry and Fisheries in Japan. The trials were conducted by the Center for Seeds and Seedlings at the Nishinihon Station in Ibaraki, Japan from 2016 to 2017. The colour determinations were made using the 2015 Royal Horticultural Society (RHS) Colour Chart.

Click on image for larger view
Ranunculus: 'Seiren' (top) with reference variety 'Cypro Apricot' (bottom)

Click on image for larger view
Ranunculus: 'Seiren' (top) with reference variety 'Cypro Apricot' (bottom)

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