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In British Columbia, Toothcup (Rotala ramosior) is presently known from three sites in the south-central part of the province. One other population, discovered in 1953, is considered extirpated. Existing populations represent the northern limit of this species, which extends from south-central British Columbia, through much of the central and western U.S.A. to Mexico and South America. Rotala ramosior inhabits moist to dried alkaline lagoons and moist lakeshores. It is most often associated with its close relative, Ammannia coccinea, and a number of semi-aquatic members of the Cyperaceae. Population trends and phenological patterns are known only from 2 years (1994 and 1995) and appear totally dependent on seasonal water levels in Okanagan Lake. At the present time, the continued existence of this species at two sites depends on water levels controlled by dams. Given the limited number of populations in British Columbia, and their precarious existence, it is recommended that Rotala ramosior be considered Enda
Douglas, George W.. 1999. Status of Toothcup in British Columbia. Ministry of Environment, Lands and Parks. Species Status Report
Topic: Species Status
Keywords: rotala ramosior, toothcup meadow-foam, status
ISSN:
Scientific Name: Rotala ramosior
ISBN: 0-7726-3855-1
English Name: Toothcup Meadow-foam
Other Identifier:
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