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Sparganium emersum · parastasis šiurpis
- European bur-reed, unbranched bur-reed
- Einfacher Igelkolben
- parastasis šiurpis
- vienkāršā ežgalvīte
- jeżogłówka pojedyncza
https://en.wikipedia.org/wiki/Sparganium_emersum It has a circumboreal distribution, occurring throughout the northern latitudes of Eurasia and North America. It is an aquatic plant, growing in shallow water bodies such as ponds and streams. It can become abundant at times. It is a perennial herb producing a floating stem up to 2 m long. The leaves may be limp and floating or stiff and erect, emerging above the water surface. The leaves are flat and straplike, sometimes with a triangular, keeled base that can help distinguish it from the similar Sparganium angustifolium. These are spherical, the male inflorescence a ball of stamens and the female inflorescence a ball of developing fruits growing beneath the male spheres.
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