Baldellia ranunculoides

Tracheophyta MagnoliopsidaAlismataceaeBaldelliaBaldellia ranunculoides


This perennial herb is restricted to habitats at the water`s edge, where potential competitors are restricted by fluctuating water levels, disturbance or moderate exposure. It usually grows in mildly to strongly calcareous or brackish waters, over a range of organic or inorganic substrates. 0-320 m (W. of Libanus, Brecs.).



World Distribution

Suboceanic Southern-temperate element.

© C. Eccleston, IWNHAS

Broad Habitats

Light (Ellenberg): 8

Moisture (Ellenberg): 10

Reaction (Ellenberg): 6

Nitrogen (Ellenberg): 2


Salt Tolerance (Ellenberg): 0

January Mean Temperature (Celsius): 4.1

July Mean Temperature (Celsius): 15.1

Annual Precipitation (mm): 974

Life form information

Height (cm): 20

Length: 20

Perennation - primary


Life Form - primary

Perennial hydrophyte (perennial water plant)



Clonality - primary

Little or no vegetative spread

Clonality - secondary

Far-creeping by stolons in illuminated medium

Comment on Clonality

Also (3rd form of clonality) by proliferous inflorescens

Count of 10km squares in Great Britain: 536

Count of 10km squares in Ireland: 344

Count of 10km squares in the Channel Isles: 6

Atlas Change Index: -1.08

Distribution information

JNCC Designations


PLANTATT - Attributes of British and Irish plants. (.zip 1455KB) This dataset was compiled and published in 2004, and last updated in November 2008. Download includes an Excel spreadsheet of the attributes, and a PDF explaining the background and nomenclature. Note that the PDF version is the booklet as published, whereas the Excel spreadsheet incorporates subsequent corrections. A hardcopy can be purchased from the Centre for Ecology and Hydrology.

Atlas text references

Atlas (300d)
Hultén E, Fries M
1986.  Atlas of north European vascular plants north of the Tropic of Cancer. 3 vols.
Meusel H, Jäger E, Weinert E
1965.  Vergleichende Chorologie der zentraleuropäischen Flora. Volume 1. 2 vols.
Preston CD, Croft JM
1997.  Aquatic plants in Britain and Ireland.