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
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Distribution of Rotala ramosior
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Species Information

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General:
Annual herb from spreading roots; stems erect to decumbent, solitary, simple or branched at the bases, 5-15 cm tall.
Leaves:
Basal leaves lacking; stem leaves usually opposite, tapered to short stalks, glabrous, lanceolate to oblanceolate, 1.5-3 cm long, 2-7 mm wide.
Flowers:
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.
Fruits:
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

Climate

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