1. Runners of Sir Joseph Paxton, Royal Sovereign and Auchincruive Climax, planted near Dundee in spring, 1952, showed emerging stolons by the fourth week of May, by late April and by the third week of May respectively.
2. Overwintered crowns produced stolons mainly in May and June, and spring-formed secondary crowns mainly from June to August.
3. De-blossoming increased the production of primary stolons.
4. Early-formed primary stolons produced the longest runner series.
5. The origin and formation of stolons is briefly described.