フィールド日記
2026年09月
2026.09.11
ハマスゲ
お茶畑のわきでハマスゲが咲いていました。海辺などに生えるカヤツリグサ科の多年草です。和名は浜に生えることに由来しますが、畑や道端などにもよく見られます。地下にできる塊茎（イモ）はコウブシと呼ばれ、漢方薬として用いられます。
"Hamasuge" plants are in bloom by the tea garden. They are perennial plants in the Cyperaceae family that commonly grow in coastal areas. Although their Japanese name comes from the fact that they often grow on beaches, they can also be found in fields and along roadsides. Their underground tubers are called "Koubushi" and are used in traditional herbal medicine.
2026.09.08
クロテンツキ
マリアガーデンでクロテンツキが生えていました。水田の畔などに生えるカヤツリグサ科の多年草です。本来は池のそばなど湿った環境を好む植物ですが、このマリアガーデンの一角もクロテンツキにとって適した環境なのかもしれません。東京では絶滅危惧種に指定されています。
"Kuro-Tentsuki" plants are in bloom in the Marian Garden on our campus. They are perennial plants in the Cyperaceae family that commonly grow along the edges of rice fields. They naturally grow in wet places such as the edges of ponds. A corner of the Marian Garden seems to be a suitable habitat for them. In Tokyo, they are listed as an endangered species.
2026.09.04
マルバノホロシ
お茶室横にマルバノホロシが咲いていました。林縁などに見られるナス科のつる性の多年草です。ヤマホロシやヒヨドリジョウゴなど似ている仲間もありますが、毛が無いことや花の基部が緑色であることによって見分けることができます。
"Marubano-Horoshi" plants are in bloom by the tea house. They are vine-like perennial plants in the Solanaceae family that commonly grow along forest edges. Closely related species such as "Hiyodorijougo" and "Yama-Horoshi" look similar, but "Marubano-Horoshi" can be distinguished from them by its hairless stems and leaves and the green color at the base of its flowers.
2026.09.01
オヒシバ
お茶畑でオヒシバが咲いています。道端などに普通に生えるイネ科の一年草です。和名の雄日芝（オヒシバ）は、花のつき方が似ているメヒシバ（雌日芝）に比べて、穂や茎が太くたくましい草姿であることが由来です。
"Ohishiba" plants are in bloom by the tea garden. They are annual plants in the Poaceae family that commonly grow along roadsides. The name comes from the fact that their spikes and stems are thicker and tougher than those of a close relative plant called "Mehishiba", which has a similar-looking inflorescence.
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