Chinese Arrowhead is a runner forming herb, runners
often ending in a tuber. Leaves are aerial at least when mature, arrow
shaped, sheathing, tip tapering to rounded, lateral lobes longer than
middle lobe. Flowers are borne in racemes, in 3 to many whorls of 3
flowers, lower 1-3 whorls usually branched; bracts free or fused toward
base. Flowers are unisexual; female flowers on lower 1-8 whorls, with
short flower-stalks; male flowers with flower-stalks 0.5-1.5 cm. Sepals
are reflexed, ovate, 3-5 x 2.5-3.5 mm. Petals are obovate, about twice
as large as sepals. Stamens are numerous; anthers yellow. Achenes are
obliquely obovoid, 4.5-5.5 x 4-5 mm, winged, with an erect, apical
beak. Chinese Arrowhead has underground tubers and is cultivated as a
food crop in NE India and parts of Asia. The tubers are high in starch
and highly nutritious. Chinese Arrowhead is native to NE India, S.
European Russia to Japan and Malesia.
Flowering: May-November.
Identification credit: J.M. Garg
Photographed in Imphal, Manipur.
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The flower labeled Chinese Arrowhead is ...