Coreopsis - Coreopsis

A cold-tolerant annual plant of the Asteraceae family. Native to America. The entire plant is hairless. Tall species can grow to over 1 meter, but there are also dwarf species that grow to 15 to 30 centimeters. The leaves are mostly twice pinnately lobed and almost linear. In early summer, flower heads measuring 3 to 4 centimeters in diameter appear at the tips of branched stems. There are 7 to 8 bright yellow ray flowers, with dark reddish brown or purple-brown bases, forming a vivid snake's eye shape. For this reason, it is also known as Janome-sou. It is also called peacock flower, as its vivid flowers resemble peacock feathers. It is extremely strong. It is sown in the fall and allowed to overwinter outdoors, where it will bloom. It is so strong that after one year, it will grow naturally all over the place the next year. Varieties include black-flowered coreopsis, double-leaf coreopsis, and orphaned coreopsis.

[Michiko Yamaguchi]

Source: Shogakukan Encyclopedia Nipponica About Encyclopedia Nipponica Information | Legend

キク科の耐寒性一年草。アメリカ原産。全株無毛。高性種は1メートル以上になるが、15～30センチメートルの矮性(わいせい)種もある。葉は多くは2回羽状に裂け、ほぼ線状。初夏、分枝した茎の先端に径3～4センチメートルの頭花をつける。舌状花は7、8個で鮮黄色、基部は濃赤褐色または紫褐色を呈し、鮮やかな蛇の目状をなす。このため別名ジャノメソウという。また、鮮やかな花姿をクジャクの羽に例え、クジャクソウともいう。性質はきわめて強い。秋播(ま)きしたものを露地で越冬させ、そのまま開花させる。1年つくると、翌年は一面に自然生えが出るほど、じょうぶである。変種にクロバナハルシャギク、ヤエハルシャギク、チャボハルシャギクなどがある。

［山口美智子］

出典　小学館　日本大百科全書(ニッポニカ)日本大百科全書(ニッポニカ)について　情報 | 凡例