Lemna trisulca

Tracheophyta MagnoliopsidaLemnaceaeLemnaLemna trisulca

Ecology

The only submerged species of Lemna in our area, L. trisulca is frequent in mesotrophic to eutrophic, still to slowly flowing waters where low nutrient levels or exposure prevent the development of a dense blanket of floating Lemna species. Reproduction is by vegetative budding; flowering is very rare. Generally lowland, but reaching 340 m at Kingside Loch (Selkirks.).

Status

Native

World Distribution

Circumpolar Temperate element.

Broad Habitats

Light (Ellenberg): 7

Moisture (Ellenberg): 12

Reaction (Ellenberg): 7

Nitrogen (Ellenberg): 5

Salt Tolerance (Ellenberg): 0

January Mean Temperature (Celsius): 3.8

July Mean Temperature (Celsius): 15.5

Annual Precipitation (mm): 832

Length: 1

Perennation - primary

Perennial

Life Form - primary

Perennial hydrophyte (perennial water plant)

Woodiness

Herbaceous

Clonality - primary

Fragmenting as part of normal growth

Count of 10km squares in Great Britain: 1156

Count of 10km squares in Ireland: 369

Count of 10km squares in the Channel Isles: 8

Atlas Change Index: -0.21

Weighted Changed Factor: -15

Weighted Change Factor Confidence (90%)

31

JNCC Designations

NBNSYS0000002357