Plants and Animals
Potamogeton vaseyi Vasey's pondweed
Aquatic plant of small lakes; submerged leaves very narrow (<1 mm wide) with stipules not adhering to leaf stalk; floating leaves (if present) narrowly elliptic (5-8 mm wide).
Status and Rank
State Status: T - Threatened (legally protected)
Global Rank: G4 - Apparently secure
State Rank: S1S2 - Rank is uncertain, ranging from critically imperiled to imperiled
|County||Number of Occurrences||Year Last Observed|
Michigan collections have come mostly from small lakes and recorded water depths of 6 and 12-15 feet, occurring in moderately alkaline or soft waters (pH mean of 7.2-7.6).
Natural Community Types
Water-milfoil, pickerel weed, three-square, pondweed, and wild celery.
A status survey is needed for this species, which has only been observed once since 1940. Where found, it likely requires protection of hydrology and management of invasive species (without broad application of systemic herbicides).
Random meander search covers areas that appear likely to have rare taxa, based on habitat and the judgement of the investigator.
Survey Period: From first week of July to fourth week of August
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