Identification
 Late-season patch S. Quagon - GLIFWC |
 Flowerstalk S. Quagon - GLIFWC |
 Spiralling leaf tips S. Garske - GLIFWC |
 Two flowerheads (umbels) S. Quagon - GLIFWC |
 Umbel of flowers S. Quagon - GLIFWC |
 Flowers from above S. Quagon - GLIFWC |
 Flowers S. Quagon - GLIFWC |
 Flowers close up S. Quagon - GLIFWC |
Habitat & Invaded Sites
 Patch in shallow water S. Garske - GLIFWC |
 Non-flowering patch S. Garske - GLIFWC |