Joint with the London Natural History Society

Meet at the junction of Commonside East and Cedar's Avenue (TQ284686) at 11:00 (11:00-16:00). This urban common was once home to the now Critically Endangered Damasonium alisma (Starfruit) which was last seen in 1940; sadly, recent reintroduction attempts appear to have failed. In addition to general recording, we will also be looking for populations of Aira caryophyllea (Silver Hair-grass), Alopecurus aequalis (Orange Foxtail), Blitum bonus-henricus (Good-King-Henry), Calluna vulgaris (Heather), Campanula rotundifolia (Harebell), Carex demissa (Common Yellow-sedge), C. leporina (Oval Sedge), C. nigra (Common Sedge), C. pulicaris (Flea Sedge), Chamaemelum nobile (Chamomile), Danthonia decumbens (Heath-grass), Erica cinerea (Bell Heather), Genista anglica (Petty whin), Hydrocotyle vulgaris (Marsh Pennywort), Lathyrus aphaca (Yellow Vetchling), Mentha pulegium (Pennyroyal), Myriophyllum spp. (Water-milfoils), Nardus stricta (Mat-grass), Oenanthe lachenalii (Parsley Water-dropwort), Ononis spinosa (Spiny Restharrow), Potamogeton pusillus (Lesser Pondweed), Ranunculus hederaceus (Ivy-leaved Crowfoot), Potentilla erecta (Tormentil), Rumex palustris (Marsh Dock), Serratula tinctoria (Saw-wort) and Spergula arvensis (Corn Spurrey), all of which are increasingly uncommon or rare in Greater London. Suitable for beginners and experts.