Primula sieboldii - Primula sieboldii

Japanese: サクラソウ(桜草) - サクラソウ（英語表記）Primula sieboldii

A perennial plant of the Primulaceae family. It is also found in the cool temperate zone of Northeast Asia, such as Eastern Siberia. It grows wild in the wetlands of the mountains and fields of Japan, and is also widely cultivated for ornamental purposes. It produces many 4-10 cm long elliptical leaves with long petioles from underground rhizomes. In April, it produces long upright flower stalks between the leaves, and at the end of the stalks several pink flowers appear in a scattered pattern. The corolla is about 2 cm in diameter, splits into five parts, and unfolds like a cherry blossom, with a tubular base. The five stamens are opposite the lobes of the corolla, and the style of the pistil can be short or long. The flower color varies from white to red to red-purple, and there are many variations in size. It has been actively cultivated in Japan since the Edo period, and there are 200 to 300 horticultural varieties. Collectively, these are called Japanese Primula. Japanese species of the same genus include the large wetland plant Primula japonica, as well as the alpine species Prunus pratense, Prunus arbutus, and Prunus persica.

Source: Encyclopaedia Britannica Concise Encyclopedia About Encyclopaedia Britannica Concise Encyclopedia Information

Japanese:

サクラソウ科の多年草。東シベリアなど東北アジアの冷温帯にも分布する。日本各地の山野の湿地に自生し，また観賞用に広く栽培される。地下の根茎から長い葉柄のある4～10cmの長楕円形の葉を多数出す。4月頃，葉間から直立する長い花茎を出し，その先に数個のピンクの花を散形状につける。花冠は直径約 2cmで5つに裂けサクラの花のように展開し，基部は筒状になる。おしべ5本は花冠の裂片と対生し，めしべの花柱は短いものと長いものがある。花色は白色，紅色，紅紫色などいろいろあり，また大きさにも変化が非常に多い。日本では江戸時代から盛んに栽培され，園芸品種の数は 200～300もある。これらを総称してニホンサクラソウという。日本産の同属のものには湿地に生じる大型のクリンソウ (九輪草)をはじめ，高山性のヒナザクラ，ハクサンコザクラ (白山小桜)，ユキワリソウ (雪割草)などがある。

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