FIG. B1. Mean (± 1 SE) Julian dates of first bloom of focal, hand-pollinated field control, and hand-pollinated greenhouse control plants of different phenological treatments, corresponding to different weeks of flowering onset relative to the current date of first bloom (CDFB) for (a) Tradescantia ohiensis and (b) Asclepias incarnata. The mean CDFB of T. ohiensis is 148 (May 28); the mean CDFB of A. incarnata is 180 (June 29; N. Bradley, C. Bradley, and A. Leopold, unpublished data). A2 = advanced by 2 weeks, A1 = advanced by 1 week, D1 = delayed by 1 week, D2 = delayed by 2 weeks, D3 = delayed by 3 weeks, D4 = delayed by 4 weeks.