Primula sieboldii




Family Primulaceae
Scientific name Primula sieboldii E. Morren
Synonyms Primula cortusoides L. var. patens Turczaninow; Primula cortusoides L. var. sieboldii (E. Morren) W. A. Nicholson; Primula patens Turczaninow; Primula patens Turczaninow var. genuina Skvortzow; Primula patens Turczaninow var. manshurica Skvortzow; Primula cortusoides L. var. patens (Turczaninow) Kitagawa; Primula cortusoides L. var. sieboldii (E. Morren) W. A. Nicholson; Primula sieboldii E. Morren forma patens (Turczaninow) Kitagawa; Primula sieboldii E. Morren forma spontanea Takeda; Primula sieboldii E. Morren var. patens (Turczaninow) Kitagawa
Common name (Japanese common name) sakura-sou (サクラソウ, 桜草 [meaning: cherry blossoms weed])
(English common name) Japanese primrose, Siebold's primrose
Distribution (Japan) Hokkaido, Honshu, Shikoku, Kyushu, Okinawa
(Other nations) Russia (western Siberia), Korea, China
Habitat Wet field
Chromosomal number 2n=22, 24, 26, 29, 36
Description Leaves 4-10cm long, 3-6cm wide. Scapes 15-40cm tall. Flowers pedicelets 5-15mm long, calyxs 5-12mm long, pink corollas 2-3cm across, flowering in April to May. Fruits ca. 5mm long. Perennial plants.
Reference Primula sieboldii E. Morren
Primula sieboldii E. Morren
Composition for improving skin environment and clothes thereof (US Patent 20040115233)
Insect repellent coating and industrial product using the same (US Patent 20060177472)
Nucleic acid molecules associated with oil in plants (US Patent 20070039069)
Note There are many cultivated hybrids.



April 2006
at Tsukuba Botanical Garden
April 2007
at Tsukuba Botanical Garden
April 2007
at Tsukuba Botanical Garden



April 2007
at Mt. Akagi
April 2007
at Mt. Akagi
April 2007
at Mt. Akagi




Flower Varieties



wild plant wild plant wild plant
April 2007
at Tsukuba Botanical Garden
April 2007
at Tsukuba Botanical Garden
April 2007
at Tsukuba Botanical Garden


cv. Dateotoko cv. Shirataki cv. Tamagawa
April 2007
at Tsukuba Botanical Garden
April 2007
at Tsukuba Botanical Garden
April 2007
at Tsukuba Botanical Garden


cv. Garyubai cv. Kyokanoko cv. shosin
April 2007
at Tsukuba Botanical Garden
April 2007
at Tsukuba Botanical Garden
April 2007
at Tsukuba Botanical Garden




Historical Varieties



cv. Nankin-Kozakura
March 2011
at my home