Curled Pondweed

This water plant is seldom seen in pictures since it grows in the water and flourish in the hot summer when there are few trips.

2011-07-20 Vienna X. district - Liesing river (170 msm Quadrant 7864/4).German name: Kraus-LaichkrautCommon.

Aqua Silkeborg

Aqua Silkeborg

Filsø, Søndersø, Henne, SV-Jylland, Danmark

Curled-leaved Pondweed (Potamogeton crispus). Found in fresh, brackish or even salt water, Massachusetts to Pennsylvania and Virginia. Also in Europe (After Britton & Brown)

Filsø, Mellemsø, Henne, SV-Jylland, Danmark

Potamogeton crispus, germinating burs. October.

Filsø, Mellemsø, Henne, SV-Jylland, Danmark

Potamogeton crispus (31-32); Potamogeton zosterifolius (33-35). 31, subterranean stem; 32, sprouting bur; 33, winter bud; 34, long section of winter bud; 35, winter bud sprouting

Filsø, Mellemsø, Henne, SV-Jylland, Danmark

Potamogeton crispus. 20, recumbent branch; 21, spicular bur; 22, denticulate bur; 23, sprouting bur; 24, denticulate bur; 25, spicular bur

Filsø, Mellemsø, Henne, SV-Jylland, Danmark

Potamogeton crispus, photo micrograph of section through stem of starch-filled vegetative structure; a, cell with starch grains. November.

Hærup Sø, Klejtrup, Jylland, Danmark

Potamogeton crispus, burs in various stages of development. June.

Doktorparken, Randers, Danmark

Potamogeton crispus. 26, Cutting showing bur development; 27, sprouting bur; 28, shoot with spicular bur at base; 29, similar structure rooting above tip of bur; 30, bur formation at tip of branch

Potamogeton crispus, leaves, showing characteristic leaf mining of chironomids.