Hello The plant that we found growing in the river is water dropwort - Oenanthe fluviatiles. Not rare but only known to grow at one other spot on the Cam. I wonder why it likes the campus so much? Oenanthe fluviatilis - Wikipedia https://urldefense.proofpoint.com/v2/url?u=https-3A__share.google_images_FD7Idel9LHRMrAMdA&d=DwIFAg&c=D7ByGjS34AllFgecYw0iC6Zq7qlm8uclZFI0SqQnqBo&r=_spmWO7LIOH9tOh3QmfWOjBC9OuMEceijv9uBctrBQOOhn9bvrV0mT9vp9YF2dlv&m=U9t0S59MwJpALKoQuNs2_ybYqN1R3uXCcqtDaTTRLFq9TAgzwLGN3clq2skVjpLD&s=hYQk-UwakPZYOW-mCol6_71-1SXtZE8FFZqJ0EkfT5U&e= Images may be subject to copyright.