Brief SummaryRead full entry
BiologyThis stonewort is usually a summer annual, but in some years, if the winter is mild, it may not fully die back. This species very rarely produces spores. It is thought that spore production is controlled by light levels, and tends to take place from July to September. This species spreads mainly by means of the star-shaped bulbils that occur on the lower stem nodes. These bulbils stay viable for several years.