Spiralling Division Planes (image) University of Bristol Share Print E-Mail Caption These are spiralling division planes that lead to 3-D plant forms in the shoot tip of a moss, Physcomitrella. Credit Dr Jill Harrison, University of Bristol Usage Restrictions Single use only to illustrate this press release and must not be archived. Share Print E-Mail Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.