354-355 Potamogeton natans L.
| First Collector | NA |
| Collection Date | NA |
| Country | Switzerland |
| Province | Zurich |
| Latitude | NA |
| Longitude | NA |
| Altitude | 450 |
| Habitat | Hydrophyte, 40- 100 cm, pond, at lower altitude |
Anatomical description of culm
Culm-diameter 2-5 mm, center full, radius of culm in relation to wall thickness 1:1. Outline circular with a smooth surface. Epidermis smooth. Epidermis cells thin-walled all around. Epidermis thin-, peripheral thicker-walled (lignified). Endodermis cell