TA2047 - Urban HornseaMuch of Hornsea is situated within this single kilometre square but only about half is built-up, the remainder being public open space offering several different habitats each contributing taxa to a remarkable total of 240. We followed Atlas 2020 instruction to record long-established planted trees in open spaces and discounting these and surprisingly few garden escapes, the total is still outstanding.
The most productive site was the infrequently mown cemetery where curbed grave areas provided small gardens for an amazing variety of ruderal species of which Veronica agrestis was perhaps the most notable. Stream Dike was appallingly eutrophic but yielded up Lemna gibba [photo above - RM] admixed with L. trisulca. Deeper in the murk there was Myriophyllum spicatum with emergent Bolboschoenus maritimus nearby. A small marshy area with shallow pools behind the boat compound produced more L. gibba with L. minor and both Juncus bufonius and J. articulatus. At the low, moat end of Garth Park, marshy grassland yielded up both Glyceria declinata and G. fluitans, and Alopecurus geniculatus.
We took a back street between parallel cobble walls, the North-facing of which yielded up our local 'standard six' wall ferns and the grass
We lamented the absence of Gabrielle 'hawkeye' Jarvis who would have pushed our total higher had she not been stuck on a bus!
Peter J Cook, October 18 2017