Apium inundatum - Lesser Marshwort
Lesser Marshwort is a plant of moorland pools, such as on the Lizard, Carnmenellis and West Penwith, and the margins of reservoirs such as Stithians (SW73C, 1990, K.L.Spurgin), Argal (SW73K, 1992, C.N.French) and Drift (SW42J, 1990, W.G.Last). It is largely restricted to West Cornwall, is rare on the Isles of Scilly and, given the intensity of recording on the mid-Cornwall moors in recent years, it seems to have disappeared from the many pools in that area. Recent records include Porthgwarra (SW32R, 1991, C.N.French), Predannack Airfield (SW61X, 1987, S.M.Hocking), Hayle Kimbro Pool (SW61Y, 1990, R.J.Murphy), Crowan Reservoir (SW63S, 1992, R.J.Murphy), near Zelah Hill (SW85G, 1998, I.J.Bennallick) and Kiberick Cove (SW93I, 1991, R.E.Lees).
French, C.N., Murphy, R.J. & Atkinson, M. 1999. Flora of Cornwall. Wheal Seton Press, Camborne.