A general term for the genus Lobelia in the Campanulaceae family (APG classification: Campanulaceae). There are more than 350 species in the world, but the most commonly used is L. erinus L. This species is a semi-cold-hardy annual native to South Africa. It grows to a height of 15-20 cm, but 30-40 cm in its native habitat, and some species are perennial. The leaves are sessile and alternate, obovate or spatula-shaped, with purple-banded and green leaves. The stems branch well and form racemes, which produce many small flowers with a diameter of 1.5-2 cm. The corolla has five lobes, with the two upper lip lobes lanceolate and the three lower lip lobes drooping. The flower colors are blue-purple, red-purple, pale blue, blue with white eyes, purple-pink with white eyes, and milky white, and most are used in flower beds and potted plants. The flowering season is from April to early summer, but autumn sowing begins to flower in April, while March sowing blooms from June to July. Other well-known species include L. fulgens Willd., which has long spikes of large bright red flowers and dark red leaves, L. cardinalis L., which has medium-sized bright red flowers and dark red leaves, and L. tenuior R.Br., which is about 90 cm tall and has dark blue flowers and green leaves. Propagation is mostly by seed, but it can also be done by taking cuttings or dividing in early spring. Seeds are sown in September or October and overwintered in a frame, or sown in a greenhouse in March and raised as seedlings. The seeds are tiny, so sow them in boxes or pots using vermiculite or well-drained soil containing organic matter, leaving the soil uncovered so they can absorb water from the bottom and are covered with newspaper until germination. When flower buds appear, plant them in an outdoor flower bed with about 15cm between plants. The stems and leaves are soft, so be careful of strong winds and rain. [Chitoshi Yoshitsugu October 20, 2021] Source: Shogakukan Encyclopedia Nipponica About Encyclopedia Nipponica Information | Legend |
キキョウ科(APG分類:キキョウ科)ロベリア属の総称。世界に350種以上あるが、一般には、もっとも多く利用されるルリミゾカクシ(ルリチョウチョウ)L. erinus L.をさす。本種は半耐寒性の一年草で南アフリカ原産。高さ15~20センチメートル、原産地では30~40センチメートルになり、宿根する種類もある。葉は無柄で互生し、倒卵形またはへら形、帯紫葉と緑葉とがある。茎はよく分枝して総状花序をつくり、径1.5~2センチメートルの小花を多数開く。花冠は5裂し、上唇の2枚は披針(ひしん)形、下唇の3枚は垂れる。花色は青紫、紅紫、淡青色のほか、青色に白目入り、紫桃色に白目入り、乳白色などがあり、大部分が花壇、鉢植えに利用される。花期は4月から初夏であるが、秋播(ま)きは4月から開花し、3月播きは6~7月咲きとなる。その他の著名種に、長穂大輪の鮮赤色花で暗紅色葉のフルゲンスL. fulgens Willd.、中輪の鮮赤色花で暗紅色葉のカーディナリスL. cardinalis L.、高さ約90センチメートル、濃青色花で緑葉のテヌイオルL. tenuior R.Br.がある。 繁殖はほとんど実生(みしょう)によるが、早春期に挿芽や株分けもできる。9~10月に播種(はしゅ)してフレーム内で越冬させるか、3月に温床内で播種して育苗する。種子は微細なので、バーミキュライトまたは有機質を含む排水のよい用土を用い箱または鉢に播き、無覆土で底部から吸水させ、発芽まで新聞紙でカバーしておく。花芽ができたころ、株間約15センチメートルで露地花壇に定植する。茎葉が柔らかいので強風雨に注意する。 [吉次千敏 2021年10月20日] 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 |
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