こいわかんすげ (小岩寒菅) [Index] [Back]
Carex chrysolepis

Carex chrysolepis

Carex chrysolepis
わが国の固有種で、四国と九州に分布しています。山地の草原や岩場、火山裸地などに生え、高さは１５〜３０センチになります。茎は叢生し、根茎は斜上します。葉は線形で、幅１．５〜３ミリです。５月から６月ごろ、茎頂に小穂をだします。頂小穂は雄性で褐黄金色、根棒状です。側小穂は２〜３個あり雌性、長さ１〜２センチです。果実は痩果、長楕円形でやや扁平な３稜形をしています。
カヤツリグサ科スゲ属の多年草で、学名は Carex chrysolepis。英名はありません。
The "Ko-iwa-kansuge" (Carex chrysolepis) belons to Cyperaceae (the Sedge family). It is a perennial herb that is an endemic species to Japan, found in Shikoku and Kyushu. It grows in mountainous grasslands, rocky areas, and volcanic bare ground, reaching a height of 15 to 30 cm. The stems grow in clumps, and the rhizomes grow obliquely upward. The leaves are linear, 1.5 to 3 mm wide. From around May to June, spikelets appear at the stem tips. The terminal spikelet is male, golden-brown, and club-shaped. There are 2 to 3 lateral spikelets, which are female and 1 to 2 cm long. The fruit is a achene, oblong in shape and slightly flattened with three ridges.
大分県九重町湯坪「小松地獄」にて、2026年05月14日撮影。
Shu Suehiro
shu@botanic.jp