Stream Water-crowfoot - Ranunculus penicillatus subsp. pseudofluitans
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Species Description
Kew classes it as a hybrid - R. fluitans × R. peltatus = R. × pseudofluitans (Syme) Kew
Stace 4:
Ranunculus penicillatus ssp. pseudofluitans (Syme) S.D. Webster (R. calcareus Butcher var. calcareus (Butcher) C.D.K. Cook, var. vertumnus C.D.K. Cook, R. vertumnus (C.D.K. Cook) Luferov, R. pseudofluitans (Syme) Newbould ex Baker & Foggitt, R. peltatus ssp. pseudofluitans (Syme) C.D.K. Cook nom. inval).
Leaves all capillary, shorter to longer than adjacent stem internode, usually about 6-8x forked with flaccid or rigid, more or less parallel or divergent segments; 2n=32, 48. England, Wales, North Ireland and South & Central Scotland. Vegetatively variable. R. penicillatus is often very difficult to distinguish from R. x bachii, R. peltatus x R. fluitans, R. peltatus or R. fluitans.