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: 1856
Latest year: 2004

County Status
Native

Family
Zannichelliaceae

Total records held
50

Grid Square Count

1987-2007	Ever
Monads: 11	26
Tetrads: 11	27
Hectads: 9	23

Conservation Status
B, A, AA

Account last edited
Jul 15 2003

Explanation of terms

Species Details

Horned Pondweed is a very rare native aquatic of still and slowly-moving water bodies, where it grows as a submerged perennial. Current records are from the lowland southern (Sudbury Hall Lake SK1531) and eastern parts (Cromford Canal SK3551 and Chesterfield fishing lake SK3868) of the county. Whilst previous records were far more widely dispersed over the county from Gill’s Park (SK32) in the south to Miller’s Dale (SK1772) in the White Peak and Chapel-en-le-Frith (SK0681) in the Dark Peak. It has also declined nationally probably due to drainage and more intensive ditch maintenance (Preston et al. 2002).

This plant is in Category 5b of the local Red Data List, 2009.