フィールド日記

2022.05.20

ヤブタビラコ

 駐車場の近くにヤブタビラコが咲いていました。茎はやわらかく、倒れたり、斜上したりしながら広がります。

下の写真はヤブタビラコの果実です。果実の先端に突起がなく凹んでいることから、近縁のコオニタビラコと見分けることができます。


"Yabu-Tabirako (ヤブタビラコ)" plants are in bloom near the parking area. Their stems are soft, so they grow crawling and standing up.
The second photo shows their fruit. You can tell them from close relative species "Ko-Oni-Tabirako" by the fact that there are no protrusions on the tip of the fruit, but there is a dimple there.

2022.05.17

タニギキョウ

 裏道でタニギキョウが咲いていました。和名の通り、山地の谷沿いなどの湿った木陰に生えるキキョウ科の多年草です。茎は柔らかく、地面をはい、上部は立ち上がって小さい白い花をつけます。


"Tani-Gikyou (タニギキョウ)" plants are in bloom on the back road. The name represents the fact that they grow in humid shady places like paths along the valleys and belong to the group of "Kikyou (キキョウ)" plants. Their soft stems crawl on the ground, and the upper parts of them stand up and bear small white flowers.

2022.05.13

デーニッツハエトリ

裏道でデーニッツハエトリを見つけました。ハエトリグモのなかまは、とても良い視力をもっており、クモの巣はつくらずに、眼で見て獲物に飛びつきます。本種は、草地や雑木林の草の上でよく見られます。

I found a  jumping spider called "Plexippoides doenitzi (デーニッツハエトリ)" on the back road. Jumping spiders have good eyesight, so they don't build webs. They catch their prey with their eys. This species is often seen in grass fields and on the grass in forests.

2022.05.10

ノイバラ

裏道でノイバラが咲いていました。学名をRosa multifloraといい、ラテン語でたくさんの花をつけるバラを意味します。ノイバラはこのたくさんの花をつける性質などからヨーロッパで園芸品種の改良に用いられ、現在の栽培バラの祖先として重要な役割を果たしたそうです。


"Noibara (ノイバラ)" trees are in bloom on the back road. They are scientifically called "Rosa multiflora" and it means "rose that bears many flowers" in Latin. Because of their characteristic of bearing many flowers, they were used in Europe for the improvement of roses. They played an important role as an ancestral species of cultivated roses. 

2022.05.06

コバンソウ

 裏門の近くでコバンソウ見つけました。和名は小穂のかたちを小判に見立てたものです。地中海沿岸原産の帰化植物で、明治時代に渡来したと言われています。ドライフラワーや花壇などに利用されています。


I found "Koban-Sou" plants near the back gate. The name comes from the fact that their spikelets look like oval gold coins called "Koban" in Japanese. They originally came from a Mediterranean region and it is said that they were firstly brought to Japan during the Meiji era. They are used for dry flowers and planted in gardens.

2022.05.03

ツマキチョウ

共生の森でツマキチョウを見つけました。幼虫の食草はアブラナ科の植物です。かつては減少傾向にあったものの、帰化植物を食草とすることで、近年は都市部でも再びみられるようになったそうです。


I found a butterfly called "Tsumaki-Chou (ツマキチョウ)" in the Kyoseinomori(共生の森). Their larvae eat cruciferous plants. They once reduced in number, but now they seem to be increasing again by eating naturalized plants and can be seen even in urban areas.

2022.04.29

イラガ

共生の森でイラガの繭を見つけました。イラガの繭は硬く、鳥の卵のようです。幼虫は毒がありますが、繭と成虫には毒はないそうです。


I found a cocoon of a moth called "Iraga" in the Kyoseinomori(共生の森). The cocoons of the "Iraga" moths are hard and look like bird's eggs. Their larvae are poisonous, but the cocoons and adults don't seem to be poisonous.

2022.04.26

ユズリハ

聖心坂の手前にあるユズリハが新葉と雄花序を伸ばしていました。雄花は花弁やがくがなく、紫色の葯が目立ちます。和名は新葉が出てから、古い葉を落とすことに由来します。


A "Yuzuriha (ユズリハ)" tree just by the Seishin bridge is sprouting new leaves and male inflorescences. Its male flowers have no petals or sepals, so the purple anthers are outstanding. The name comes from the fact that they let their old leaves fall after their new leaves grow.

2022.04.22

アカメガシワ

共生の森でアカメガシワが新芽を出しています。伐採跡地などによく見られる落葉高木です。和名は、春にでる新芽が赤いことに由来します。


赤い葉を双眼実体顕微鏡で見ると、星状毛と呼ばれる形の赤い毛が密に生えていることがわかります。


"Akame-Gashiwa (アカメガシワ)" trees are sprouting new shoots in the Kyoseinomori(共生の森). They are a deciduous tall tree and often seen in logging sites. "Akame (アカメ)" in its name means "red sprout" and comes from the fact that their sprouts are red in spring. Seeing red leaves under a binocular stereo microscope, you can find red star-shaped hair growing densely.

2022.04.19

ナガミヒナゲシ

グラウンドの花壇にナガミヒナゲシが咲いています。道ばたや空き地などにふつうに見られるヨーロッパ原産の帰化植物で、近年著しく増えていると言われています。この花壇のものも植えてはいないので、どこからか種が入ってきたのだと思われます。


"Nagami-Hinageshi (ナガミヒナゲシ)" plants are in bloom in the flower bed in the school ground. They originally come from Europe and are often seen in roadsides and vacant lots. It is said that they are really increasing these days. We didn't plant them in this flower bed, so they should have come from somewhere.