Stem cells and cellular pedigrees : a conceptual introduction / Markus Loeffler and Christopher S. Potten -- Stem cells and founder zones in plants, particularly their roots / Peter W. Barlow -- The stem cell concept applied to shoot meristems of higher plants / Dennis Francis -- Skeletal muscle stem cells : function and potential role in therapy / Diana J. Watt and Gareth E. Jones -- Cell progenitors in the neural crest / Catherine Dulac and Patrizia Cameron-Curry -- Phenotypic diversity and lineage relationships in vascular endothelial cells / Ana M. Schor, Seth L. Schor and Enrique Arciniegas -- Mammary stem cells in normal development and cancer / Philip S. Rudland, Roger Barraclough, David G. Fernig and John A. Smith -- Liver stem cells / J.W. Grisham and Snorri S. Thorgeirsson -- Regulation of proliferation and differentiation of stem cells in the male germ line / Dirk G. de Rooij and Federica M.F. van Dissel-Emiliani -- Stem cell repertoire in the intestine / Nicholas A. Wright -- Keratinocyte stem cells of cornea, skin and hair follicles / Stanley J. Miller, Robert M. Lavker and Tung-Tien Sun -- Tumour stem cells / Johann Kummermehr and Klaus-Rüdiger Trott -- Biology of the haemopoietic stem cell / Brian I. Lord -- Growth factors and the regulation of haemopoietic stem cells / Clare M. Heyworth, Nydia G. Testa, Anne-Marie Buckle and Anthony D. Whetton -- Haematopoietic stem cells for gene therapy / Jan A. Nolta and Donald B. Kohn.