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
Example sentencesExamples
- Austral Pillwort is at first appearance a very unfern-like, semi-aquatic fern, resembling more a small fine grass.
- 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.