A creeping grasslike aquatic fern which has slender shoots with small globular spore-producing bodies at their bases, growing on the muddy margins of ponds and lakes in western Europe.
Pilularia globulifera, family Marsileaceae‘In Cumbria we are looking for volunteers to help carry out a survey for two unusual Back from the Brink rarities - marsh clubmoss and pillwort.’
- ‘Austral Pillwort is at first appearance a very unfern-like, semi-aquatic fern, resembling more a small fine grass.’
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