Bluebell - Bluebell

A perennial plant of the family Boraginaceae (APG classification: Boraginaceae). The entire plant is covered with coarse hairs, and the stems are 20-40 cm tall. The basal leaves are small. The stem leaves are alternate, and the lower leaves are large, oblanceolate, and pointed at the tip. From April to June, the tip of the stem splits into two, and pale blue five-petaled flowers bloom. The pods have rows of hook-shaped spines along the edge. They grow in forests in low mountain areas, and are found in Honshu, Hokkaido, and the Chubu region northward. The name comes from the color of the flowers. In the genus Boraginaceae, the dorsal edge of the pods is entire or has rows of hook-shaped spines, and is dented like a navel. There are about 28 species in the world, and in Japan, in addition to this species, there are Yamarurisou, Hairurisou, and Etigorurisou.

[Hideo Takahashi July 16, 2021]

Source: Shogakukan Encyclopedia Nipponica About Encyclopedia Nipponica Information | Legend

ムラサキ科（APG分類：ムラサキ科）の多年草。全草に開出する粗毛があり、茎は高さ20～40センチメートル。根出葉は小さい。茎葉は互生し、下部の葉は大形、倒披針(とうひしん)形で先はとがる。4～6月、茎の先が二又に分かれ、淡青色の5弁花を開く。分果は縁(へり)に鉤(かぎ)形の刺(とげ)が並ぶ。低山地の林内に生え、中部地方以北の本州、北海道に分布する。名は、花色に由来する。ルリソウ属は分果の背面の縁は全縁または鉤形の刺を列生し、へそ形にへこむ。世界に約28種、日本には本種のほかヤマルリソウ、ハイルリソウ、エチゴルリソウが分布する。

［高橋秀男　2021年7月16日］

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