フィールド日記

2026.01.16

コクラン

コクランが果実をつけていました。林床に生えるラン科の多年草です。果実の中にはホコリのように細かい種子がたくさん入っており、風によって飛ばされます。

"Kokuran" plants are now bearing fruit. They are perennial orchids that grow on forest floors. Their fruits contain many dust-like tiny seeds, which are dispersed by the wind.

種子植物

2026.01.13

クサギ

クサギの冬芽と葉痕が見られます。シソ科の落葉高木です。冬芽は芽鱗（がりん）に覆われていない裸芽（らが）で、紫褐色の毛におおわれています。葉が落ちたあとの葉痕はひづめのような形をしています。

You can find the winter buds and leaf scars of "Kusagi" trees. They are deciduous species in the Lamiaceae family. Their winter buds are naked, meaning they are not covered with bud scales, and they have deep purple hairs. Their leaf scars, which are the marks after the leaves have fallen, are shaped like a hoof.

種子植物

2026.01.09

ミヤマノコギリシダ

ミヤマノコギリシダが見られます。メシダ科の常緑のシダ植物です。胞子のう群は線形で、葉脈に沿ってつきます。似ている仲間が多く、分類が難しい種と言われています。

"Miyama-Nokogirishida" fern plants are growing. They are evergreen fern plants in the Athyriaceae family. Their line-shaped sori run along the leaf veins. It is said that they are difficult to identify, as many closely related species look very similar.

シダ植物

2026.01.06

フヨウ

フヨウの果実が熟していました。アオイ科の落葉低木です。果実は割れて、中の種子が見えています。種子には毛が生えており、風によって運ばれるようです。

The fruits of "Fuyou" trees have ripened. They are deciduous shrubs in the Malvaceae family. The seeds are visible as the fruits split open. They are covered with fine hairs, which allow them to be carried by the wind.

種子植物

2026.01.02

フユイチゴ

フユイチゴが実をつけています。バラ科の常緑小低木で、キイチゴの一種です。和名は冬に果実が熟すことに由来します。

"Fuyu-Ichigo" plants are now bearing fruits. They are small evergreen shrubs in the Rosaceae family that are a type of raspberries. The name comes from the fact that their fruit ripens in winter.

種子植物

2025.12.30

トキワサンザシ

トキワサンザシが実をつけています。バラ科の常緑低木で、観賞用に広く栽培されています。園芸ではこの仲間を総称してピラカンサと呼び、多くの品種があります。

"Tokiwa-Sanzashi" trees are now bearing fruit. They are evergreen shrubs in the Rosaceae family that are commonly planted in gardens. In gardening, they and their relative species are known as "Pyracantha," and there are many cultivated varieties.

種子植物

2025.12.26

コセンダングサ

コセンダングサが咲いています。熱帯に広く分布するキク科の１年草です。果実はいわゆる「ひっつき虫」で、先端にトゲが３本ほどあり、動物や衣類にくっついて運ばれます。

"Ko-Sendangusa" plants are in bloom. They are annual plants in the Asteraceae family that widely grow in the tropical regions. Their fruit, which is commonly known as "Hittsukimushi", are dispersed by animals and clothing, as the fruit have hooks at their tips.

種子植物

2025.12.23

クロヤツシロラン

クロヤツシロランが種子を飛ばしていました。養分を完全に菌類から得ているラン科の多年草です。秋に咲く花は地上から数センチの高さしかなくあまり目立ちませんが、花のあと花柄が急速に伸び、ほこりのような細かい種子を放出します。

"Kuro-Yatsushiroran" plants are dispersing their seeds. They are perennial plants in the Orchidaceae family that obtain all of their nutrition from fungi. Their flowers, which bloom in fall, are only a few centimeters tall and therefore easily overlooked. However, after flowering, their flower stems grow rapidly, allowing their dust-like tiny seeds to be dispersed by the wind.

種子植物

2025.12.19

ハナカンナ

ハナカンナが咲いています。観賞用に栽培されるカンナ科の多年草です。花期は夏から秋で、冬には地上部は枯れますが、この株は12月に入っても花を咲かせていました。

"Hana-Kanna" plants are in bloom. They are perennial plants in the Cannaceae family that are commonly grown in gardens. Their usual flowering season is from summer to fall. In winter, the parts above the ground die back, but this plant is still flowering even in December.

種子植物

2025.12.16

シュウカイドウ

シュウカイドウが咲いています。シュウカイドウ科の多年草です。古くから栽培されており、逸出したものが人家周辺で野生化しています。花期は秋海棠（シュウカイドウ）という名前の通り秋ですが、12月に入っても開花している個体がありました。

"Shuukaidou" plants are in bloom. They are perennial plants in the Begoniaceae family and have been cultivated for a long time. Some have spread into the wild and can be often found growing near houses. As their name suggests, they usually bloom in autumn, but the plant in the photo was flowering even in December.