266-267 Vallisneria spiralis L.
| First Collector | NA |
| Collection Date | NA |
| Country | Germany |
| Province | Mecklenburg-Vorpommern |
| Latitude | NA |
| Longitude | NA |
| Altitude | 20 |
| Habitat | Hydrophyte, 20- 30 cm, pond |
Anatomical description of culm
Culm-diameter 5-10 mm, center full, radius of culm in relation to wall thickness 1:1. Outline circular with a smooth surface. Culm-center full, containing unlignified cells. Culm without endodermis but with a sheath of lignified cells around the center. E