たまみくり (玉実栗)

Sparganium glomeratum

Sparganium glomeratum

Sparganium glomeratum

わが国の本州、中部地方以北から北海道それに北半球の寒冷地に広く分布しています。山地から亜高山帯の湿地に生え、高さは40〜60センチになります。茎は円柱状で直立し、葉は広い線形で互生します。7月から8月ごろ、茎の上部に雄性花序を1〜2個、そのすぐ下に雌性花序を3〜4個つけます。和名は、小さな球形の集合果を「くり(栗)」のいがに見立てたもの。 
ミクリ科ミクリ属の多年草で、学名は Sparganium glomeratum。英名は Clustered bur-reed。 
The Clustered bur-reed ( Sparganium glomeratum) belongs to the family Sparganiaceae. It is a perennial herb that is widely distributed from the Chubu region of Honshu north to Hokkaido, and the cold regions of the northern hemisphere. It grows from mountainous to subalpine wetlands and can reach 40-60 cm in height. The stems are columnar and upright, and the leaves are broad and linear and alternate. From July to August, it is borne 1 to 2 male inflorescences on the upper part of the stem and 3 to 4 female inflorescences just below it. The Japanese name is a small spherical aggregate fruit that looks like a chestnut. 
長野県山ノ内町「東舘山高山植物園」にて、2005年07月15日撮影。 

Shu Suehiro
shu@botanic.jp