E-Flora BC: Electronic Atlas of the Flora of British Columbia

Rotala ramosior (L.) Koehne
toothcup meadow-foam (lowland rotala)
Lythraceae (Loosestrife family)

Introduction to Vascular Plants
Once images have been obtained, photographs of this species will be displayed in this window.Click on the image to enter our photo gallery.
Currently no image is available for this taxon.
E-Flora BC Static Map
Distribution of Rotala ramosior
Click here to view our interactive map and legend
Details about map content are available here
Click on the map dots to view record details.

Species Information

Click on the image below to view an expanded illustration for this species.

Annual herb from spreading roots; stems erect to decumbent, solitary, simple or branched at the bases, 5-15 cm tall.
Basal leaves lacking; stem leaves usually opposite, tapered to short stalks, glabrous, lanceolate to oblanceolate, 1.5-3 cm long, 2-7 mm wide.
Inflorescence of solitary, urn-shaped, axillary flowers, the flowers usually only 1 per axil; petals white, usually 4, about 1 mm long; styles less than 1 mm long, not exserted from the calyx.
Capsules, round, about 3 mm long.

Source: The Illustrated Flora of British Columbia

Habitat / Range

Wet, sandy lake shores and ponds in the steppe zone; rare in SC BC, known only from Osoyoos Lake and Kamloops Lake; disjunct to ON, S to NH, FL, CA and MX; W Indies.

Source: The Illustrated Flora of British Columbia


The climate type for this species, as reported in the: "British Columbia plant species codes and selected attributes. Version 6 Database" (Meidinger et al. 2008), is not evaluated, unknown or variable.

Synonyms and Alternate Names

Rotala catholica (Cham. & Schlecht.) van Leeuwen
Rotala dentifera (A. Gray) Koehne
Rotala ramosior var. interior Fern. & Grisc.
Rotala ramosior var. typica Fern. & Grisc.

Taxonomic and Nomenclatural Links

Additional Photo Sources

General References