TY - JOUR T1 - The Colouring Matter of Red Roses JF - Proceedings of the Royal Society of London. Series B, Containing Papers of a Biological Character (1905-1934) VL - 93 IS - 651 SP - 194 EP - 197 PY - 1922/03/01/ UR - http://dx.doi.org/10.1098/rspb.1922.0013 M3 - doi:10.1098/rspb.1922.0013 AU - Currey, G. ER -