Hottonia palustris

Tracheophyta MagnoliopsidaPrimulaceaeHottoniaHottonia palustris


A stoloniferous perennial of still, shallow, base-rich, clear and not eutrophicated water bodies, including ponds, ditches, ox-bows and backwaters. It can withstand shade and temporary exposure. It is heterostylous, requiring crosses between pins and thrums to set seed; vegetative growth often produces single-morph colonies that set little seed. Lowland.



World Distribution

European Temperate element.

Broad Habitats

Standing water and canals

Light (Ellenberg): 7

Moisture (Ellenberg): 11

Reaction (Ellenberg): 7

Nitrogen (Ellenberg): 5

Salt Tolerance (Ellenberg): 0

January Mean Temperature (Celsius): 3.6

July Mean Temperature (Celsius): 16

Annual Precipitation (mm): 697

Length: 120

Perennation - primary


Life Form - primary

Perennial hydrophyte (perennial water plant)



Clonality - primary

Irregularly fragmenting (mainly water plants)

Count of 10km squares in Great Britain: 463

Count of 10km squares in Ireland: 2

Count of 10km squares in the Channel Isles: 0

Atlas Change Index: -0.63

JNCC Designations


Atlas text references

Atlas (201d)
Brock TCM, Mielo H, Oostermeijer G
1989.  On the lifecycle and germination of Hottonia palustris L. in a wetland forest. Aquatic Botany. 35:153-166.
Curtis TGF, McGough HN
1988.  The Irish Red Data Book. 1. Vascular Plants.
Hultén E, Fries M
1986.  Atlas of north European vascular plants north of the Tropic of Cancer. 3 vols.
Meusel H, Jäger E, Rauschert S, Weinert E
1978.  Vergleichende Chorologie der zentraleuropäischen Flora. Volume 2. 2 vols.
Preston CD, Croft JM
1997.  Aquatic plants in Britain and Ireland.