The Flora of Derbyshire - Checklist, Maps and Sample Accounts

THIS IS A DRAFT

The species account below is an early version, drafted around 2003. It has been provided here to aid understanding, but please be aware it may not fully tally with the up-to-date map and statistics shown below.

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Dates
First year: 1829
Latest year: 1979

County Status
Native

Family
Potamogetonaceae

Total records held
20

Grid Square Count

1987-2007	Ever
Monads: 0	9
Tetrads: 0	8
Hectads: 0	10

Conservation Status
H, B, AA

Account last edited
Mar 21 2004

Explanation of terms

Species Details

Opposite-leaved Pondweed is a submerged native perennial of streams ponds and canals. There are no recent records. Previously it occurred widely but rarely throughout the southern and eastern parts of our area in clear, often fast-flowing waters. The latest records are from the Magnesian Limestone area at Pleasley (SK5164) and Markland Grips (SK5074) in the 1970s. There are also earlier sightings from New Stanton (SK4639) in 1969, and from Cromford (SK25) and Calke Abbey (SK32) both for 1903. This local loss is matched by a national decline since before 1930 due to the nutrient enrichment of waters (Preston XXet al. 2002).

This plant is in Category 2 of the local Red Data List, 2009.