Seed Plant Encyclopedia 【種子植物図鑑 #003】イチョウ科の種類は？写真一覧
イチョウ科 Ginkgoaceae は落葉高木。葉は偏平に広がり、葉脈は葉柄付け根から二叉分岐を繰り返し、平行脈となり上部葉縁に達します。雌雄異株・雄花は細い軸に多数の葯をつけます。雌花は花柄の先に多くは2個の胚珠を上向きにつけます。受精は...
Seed Plant Encyclopedia 
Seed Plant Encyclopedia 【種子植物図鑑 #001】ソテツ科の種類は？写真一覧
ソテツ科 Cycadaceae は、ソテツ綱ソテツ目に属する植物の科。現生種はいずれも常緑木本。葉は羽状複葉で、小葉は細長くとがります。茎先に多数つき、基部は茎に残ります。雌雄異株で、花は茎に頂生または側生します。雄蕊（小胞子葉）は鱗片状で...
plant キョウチクトウの毒はどのくらい危険？なぜ広島では平和の象徴？蜜を分泌しないキョウチクトウの花は絶滅種に擬態していた！？
キョウチクトウは公園での植え込みや街路樹など日本国内で様々な地点で見かける園芸樹木ですが、元々は地中海から東南アジアに分布しており、諸説ありますが、葉5～15枚が致死量と言われ、国内でも極稀ですが、中毒の報告があります。また燃やした煙にも毒...
animal The mysterious fly known as the bee-like hoverfly, which is born and lives on tree sap, can it sting? Is it harmful?
Are you familiar with the hoverfly known as the false bee hoverfly? At first glance, it looks exactly like a bee, but hoverflies are actually a type of fly, so they won't sting you and are harmless. Its bright colors are thought to be a form of mimicry. Although it's actually a type of hoverfly...
plant What are the differences between persimmon (Diospyros kaki), Japanese persimmon (Diospyros serrata), and mountain persimmon (Diospyros margaritacea)? We'll explain how to distinguish between similar species! Where are they native to? What's the difference between astringent and sweet persimmons? What insects visit the flowers? Who eats them in nature?
The Japanese persimmon (kaki) has been cultivated in Japan since ancient times and is a fruit and plant strongly associated with Japanese culture. While closely related species exist, the Japanese persimmon is easily distinguishable by the size of its fruit. However, when distinguishing by leaves alone, it resembles the Japanese dwarf persimmon (Diospyros kaki), the Ryukyu dwarf persimmon (Diospyros ryukyuensis), and the evergreen persimmon (Diospyros kaki), and subtle differences...
animal What are the species of moths in the family Zygaenidae? Are they poisonous? Are they harmful? What is the purpose of their bright colors?
The Zygae family, exemplified by species like the firefly moth and the bamboo grass moth, is known for its bright, diurnal colors. But do you know why they have such striking colors? It turns out they possess a powerful poison that produces cyanide, and these colors serve as a "warning signal"...
plant ヤマツツジとレンゲツツジの違いは？似た種類の見分け方を解説！蝶を呼ぶことに特化したはずの花にはマルハナバチも不可欠だったことが研究で判明！
ヤマツツジは日本の野生ツツジの代表種で、レンゲツツジは毒性がある種類として有名です。いずれもツツジ科ツツジ属で、赤い野生のツツジとして代表的な種類のため、迷うことがあるかもしれませんが、葉の形の花の付き方を確認すれば区別できます。これら2種...
animal What kind of dragonfly is a "red dragonfly"? Why does it turn red? Why does the common skimmer dragonfly turn blue? Two scientific reasons have been revealed. It turns out it's actually "sunscreen"!?
The "red dragonfly" is a creature so familiar to Japanese people that it even has its own children's song. The group commonly referred to as "red dragonfly" is a general term for dragonflies whose males turn red. Taxonomically, it's not a single group but rather a collective term for several separate groups, such as the Sympetrum and Scarlet Skimmer genera.
plant What are the differences between buckwheat (soba), Tartary buckwheat (Tartary buckwheat), and Shakuchiri buckwheat (Shakuchiri buckwheat)? We explain how to distinguish between similar varieties! Is buckwheat's origin in mountainous regions? Why do Japanese people eat it as noodles? Are honeybees the only insects that visit its flowers?
Buckwheat, Tartary buckwheat, and Japanese buckwheat are all species that can be found in Japan, either cultivated or naturalized. Buckwheat, in particular, is indispensable to Japanese people as a noodle dish, but few people can distinguish between these three species as plants. These three species differ in the way their flowers grow, the shape of their fruits, etc.
animal なぜモモブトカミキリモドキの「腿」は太いのか？メスを押さえつけるための進化だった！？近縁種にヒントがあることが最新研究で判明！「性的対立」から科学的に考える
皆さんはモモブトカミキリモドキという昆虫をご存知でしょうか？春～初夏頃に花上に集まりカミキリモドキ科の中では本州では一般的によく見られます。この昆虫最大の特徴として後脚が太くなっています。なぜこのようなことになっているのか不思議に思ったこと...