This refers to flowers in which pollen is carried to the stigma of the pistil by insects; some are transmitted by specific insects and some are not. Insect-pollinated flowers have beautiful petals, calyx, and bracts to attract insects, and many have well-developed nectar glands and give off a strong fragrance. Pollen is small in quantity and easily adheres to insects with mucus and projections, and the flower structure is well suited to the shape of the insect. For example, some orchids have complex patterns on their petals that resemble female insects, which attract males, and when a bumblebee lands on a salvia flower, the stamens swing about and deposit pollen on the bee's back. [Seiichi Yoshida] Source: Shogakukan Encyclopedia Nipponica About Encyclopedia Nipponica Information | Legend |
花粉が昆虫によって雌しべの柱頭に運ばれる花をいい、特定の昆虫によって媒介されるものと、そうでないものとがある。 虫媒花には、昆虫を誘引するための美しい花弁、萼(がく)、包葉などをもち、蜜腺(みつせん)が発達し、強い芳香を出すものが多い。花粉は少量で粘液や突起などで昆虫に付着しやすく、花の構造も昆虫の形とよく適合している。たとえば、ある種のランは花弁に昆虫の雌に似た複雑な模様をもち、これによって雄を引き付け、サルビアの花では、マルハナバチが止まると雄しべが揺れ動いて花粉をハチの背中につける。 [吉田精一] 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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