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フィールド日記

種子植物

2026.08.07

ヨウシュヤマゴボウ

 裏道でヨウシュヤマゴボウが咲いています。空き地などに見られるヤマゴボウ科の多年草です。食用として山ごぼうという名で売られている植物はキク科のモリアザミで、本種とは全くの別種です。本種は全体に毒があり、根や果実は食べることができません。

"Youshu-Yamagobou" plants are in bloom along the back road. They are perennial plants in the Phytolaccaceae family that commonly grow in vacant lots and other open areas. Although the name "Yamagobou" is also used for an edible food, that product actually comes from the roots of the "Moriazami" plant, a member of the Asteraceae family, and is completely unrelated to this species. All parts of Youshu-Yamagobou are toxic, so their roots and fruits are not edible.

2026.08.04

メヒシバ

 お茶畑でメヒシバが咲いています。畑などに良く生えるイネ科の一年草です。日本全土で見られるほか、世界の暖帯~温帯に広く分布しているといわれています。

"Mehishiba" plants are in bloom by the tea garden. They are annual plants in the Poaceae family that commonly grow in fields. They are found throughout Japan and also are seen in warm-temperate and temperate regions around the world.

2026.07.31

キツネノボタン

 裏道でキツネノボタンが咲いています。湿った環境に生えるキンポウゲ科の多年草です。和名は、葉がボタンの葉に似ていることに由来します。似た仲間にケキツネノボタンがありますが、茎の毛の様子や、葉の切れ込みなどから見分けることができます。

"Kitsuneno-Botan" plants are in bloom along the back road. They are perennial plants in the Ranunculaceae family and thrive in moist places. Their Japanese name comes from the resemblance of their leaves to those of  the "Botan" plants. A closely related species "Ke-Kitsuneno-Botan" looks very similar, but the two can be distinguished by the presence of hairs on the stem and by the shape of their leaf lobes.

2026.07.28

ヒナノシャクジョウ

裏道でヒナノシャクジョウが咲いていました。ヒナノシャクジョウ科の多年草です。葉緑体を持たず全体が白色で菌類に依存して生育しています。

"Hinano-Shakujou" plants are in bloom along the back road. They are perennial plants in the Burmanniaceae family.  Lacking chlorophyll, they are entirely white and obtain all of their nutrients from fungi.

2026.07.17

キブシ

裏道でキブシが実をつけていました。林縁などに生えるキブシ科の落葉低木です。和名は五倍子(ふし)と呼ばれるヌルデの虫こぶの代わりに、この果実が黒い染料の原料として用いられたことに由来します。
"Kibushi" trees are bearing fruit along the back road. They are deciduous shrubs in the Stachyuraceae family that naturally grow along forest edges. The Japanese name “Kibushi” comes from the fact that their fruit was once used as a substitute for the galls of the Chinese sumac tree known in Japanese as  "Fushi (五倍子)”, which were traditionally used to produce black dye.

2026.07.03

タチチチコグサ

 セカンドオークヒルでタチチチコグサが咲いています。空き地などに生えるキク科の1年草または越年草です。チチコグサと名の付く北アメリカ原産の帰化植物の一種で、近年数を増やしているようです。

"Tachi-Chichikogusa" plants are in bloom in the Second Oak Hill. They are annual or winter annual plants in the Asteraceae family that commonly grow in vacant lots and other open areas. Native to North America, this naturalized species is one of several plants whose Japanese names include "Chichikogusa." It has become increasingly common in recent years.

2026.06.26

ヤマアジサイ

沢沿いにヤマアジサイが咲いています。林縁などに見られるアジサイ科の落葉低木です。中心の花弁が目立たない両性花を、がくが花びら状に発達した装飾花が取り囲んでいます。本種がもとになった園芸品種も、多く栽培されています。

 

"Yama-Ajisai" trees are in bloom along the stream. They are deciduous shrubs in the Hydrangeaceae family that grow naturally along forest edges and mountain streams. The inconspicuous bisexual flowers in the center are surrounded by showy decorative flowers with petal-like sepals. Many cultivated hydrangea varieties have been developed from this species.

2026.06.23

トウネズミモチ

裏道でトウネズミモチが咲いています。モチノキ科の常緑小高木です。中国原産で、公園などに植栽されたものが逸出し、林内でも普通に見られます。在来種のネズミモチに比べ、花期が少し遅く、また葉が薄く葉脈が目立つという特徴があります。

"Tou-Nezumimochi" trees are in bloom along the back road. They are evergreen small trees in the Aquifoliaceae family. This species is a naturalized plant originally from China. The trees that were once cultivated in parks have escaped into the wild and are now commonly found in woodlands. Compared with the native  "Nezumimochi", they flower slightly later and have narrower leaves.

2026.06.19

ヤブヘビイチゴ

 裏道でヤブヘビイチゴの実がなっていました。林縁などに見られるバラ科の常緑多年草です。ヘビイチゴに比べ、全体的に大型で、日陰に多く生えています。実も大きく、おいしそうですが、実際には食用にはなりません。

"Yabu-Hebiichigo" plants are now bearing fruit along the back road. They are evergreen perennial plants in the Rosaceae family that commonly grow along forest edges. Compared with their relative, "Hebiichigo", they are generally larger and prefer shady places. Their bright red fruits are quite large and look delicious, but they are not edible.

2026.06.16

シロツメクサ

 マリアガーデンでシロツメクサが咲いています。空き地などでよく見られるマメ科の多年草です。和名にあるツメクサ(詰め草)は、江戸時代にオランダからガラス製品を持ち込む際に、本種が緩衝材として詰められたことに由来します。

"Shiro-Tsumekusa" plants are in bloom in the Marian Garden. They are perennial plants in the Legume family that commonly grow in vacant lots and other open areas. The Japanese name "Tsumekusa" comes from the fact that these plants were used as packing material to cushion glassware imported from the Netherlands during the Edo period.