ひめごうそ (姫郷麻) [Index] [Back]

Carex phacota

Carex phacota

Carex phacota

Carex phacota

わが国の各地をはじめ、台湾や朝鮮半島、中国、インドシナ半島、インドネシア、インドおよびスリランカに分布しています。池のほとりや湿地、湿った道端などに生え、高さは20〜60センチになります。根茎は短く、叢生します。葉は粉緑色で線形、幅は2〜6ミリです。3月から5月ごろ、花茎を伸ばして、3〜5個の小穂をつけます。頂小穂は雄性、線形で長さ2〜5センチ。側小穂は雌性、円柱形で長さ2〜6センチ、下方のものは柄があって垂れ下がります。果実は倒卵形で長さ2ミリほど、断面はレンズ状です。台湾華語では「鏡子薹」、中国語では「鏡子薹草(jing zi tai cao)」と呼ばれます。
カヤツリグサ科スゲ属の多年草で、学名は Carex phacota。英名は Lentoid sedge。
The Lentoid sedge (Carex phacota) belongs to Cyperaceae (the Sedge family). It is a perennial herb that is distributed throughout Japan, as well as in Taiwan, the Korean Peninsula, China, the Indochinese Peninsula, Indonesia, India, and Sri Lanka. It grows along pond edges, in wetlands, and on damp roadsides, reaching a height of 20 to 60 cm. The rhizomes are short and grow in clumps. The leaves are pale green and linear, 2-6 mm wide. From around March to May, it extends a flower stalk bearing 3 to 5 spikelets. The terminal spikelet is male, linear, and 2-5 cm long. The lateral spikelets are female, cylindrical, and 2-6 cm long; the lower ones have stalks and hang down. The fruit is obovate, about 2 mm long, with a lenticular cross-section. It is called "鏡子薹" in Taiwanese Chinese and "鏡子薹草" (jing zi tai cao) in Chinese.
長崎県雲仙市小浜町「原生沼」にて、2026年05月12日撮影。

Shu Suehiro
shu@botanic.jp