Welsh Journals

FIELD NOTES. PLANTS. Plant notes and records are compiled by T. A. Warren Davis, South Mullock, Haverfordwest, Pembs., Dyfed, from reports of B.S.B.I. County Recorders to whom records should preferably be sent. Any received by T.A. W.D. will be passed to the Recorder concerned. Plants are listed for each county in the order of Dandy, List of British Vascular Plants (1968), the number in that list preceding the name, so that names recently changed can be used without giving the former name. All records for 1974 unless otherwise stated. The County Recorders are:- T. G. Evans, La Cuesta, Mounton Road, Chepstow, Gwent. v.c. 35 MONMOUTH. G. Ellis, National Museum of Wales, Cardiff, CF1 3NP. v.c. 41 GLAMORGAN. M. Porter, Ynys Villa, Llangynidr, Crickhowell, Powys, v.c. 42 BRECON. Miss A. C. Powell, Corner Cottage, Great Oak, Eardisley, Hereford, v.c. 43 RADNOR. Mrs. I. M. Vaughan. M.B.E., F.L.S., Tal Ebolion, Cilycwm, Llandovery, Dyfed. v.c. 44 CARMARTHEN. T. A. W. Davis, South Mullock, Dale, Haverfordwest, Pembs., Dyfed. v.c. 45 PEMBROKE. Dr. J. P. Savidge, Dept. of Botany, U.C.W., Aberystwyth, Dyfed. SY23 4ST. v.c. 46 CARDIGAN. Mrs. P. A. Parr, Tynewydd, Cwm Golau, Welshpool, Powys. v.c. 47 MONTGOMERY. P. M. Benoit. Pencarreg. Barmouth, Gwynedd. v.c. 48 MERIONETH. M. Morris, Afallon, Treforris Road, Penmaenmawr, Gwynedd. v.c. 49 CAERNARVON. J. M. Brummit, 69 Cambrian Drive, Colwyn Bay, Clwyd. v.c. 50 DENBIGH. Goronwy Wynne, Gwylfa, Lixwm, Holywell, Clwyd. v.c. 51 FLINT. R. H. Roberts, Quinton, Belmont Road, Bangor, Gwynedd. v.c. 52 ANGLESEY. TWO UNEXPECTED PLANTS IN BLOW HOLES Two of the blow holes which are such a conspicuous feature of the cliff tops along the Carboniferous Limestone coast of south Pembrokeshire, Dyfed, have recently yielded interesting plant records. Trapped air at the landward end of sea caves becomes compressed by in- coming waves, and the resulting hydraulic action within the bedding planes and between the joints loosens the blocks and leads gradually to collapse so that a chimney is formed, opening on the cliff top. In stormy conditions salt spray is blown up through these steep sided holes, so that the habitat has similar characteristics to an open cliff. Sea Purslane (Halimione portulacoides) is a common salt marsh plant, typically fringing tidal creeks, and only rarely occurs on cliffs. In a blow