Proceedings of the Botanical Society of the British Isles. Arbroath. Vols. 1-7, 1954/55-69. Proc. Bot. Soc. Brit. Isles. Preceded by: Year book of the Botanical Society of the British Isles. Arbroath. Incorporated in: Watsonia. Arbroath, London. ISSN 0524-1413 HI 62765