Fig. 2. Relationships between (A) proportions of flowering plants (%) and (B) number of panicles per plant and age at onset of dormancy (days from sprouting) in P. bulbosa plants sampled at locations with different aridities (110–810 mm rain year^–1). Flowering was determined in parental plants grown under natural conditions (net‐house). Age at the onset of dormancy was determined in daughter plants grown in the phytotron under 16 h days, 22/16 °C (day/night). A, % flowering y = 162·0 – 1·3x, r = –0·826, d.f. = 14, P < 0·001; B, panicles per plant y = 11·98 – 0·09x, r = –0·594, d.f. = 14, P < 0·02. Numbers indicate population codes (see Table 1).