Abstract
The control of flowering of Carex bigelowii from the Rondane Mountains in southern Norway has been studied in controlled environments. The combination of short days and moderate temperatures for at least 10 weeks caused floral induction and inflorescence initiation in a high proportion of the plants. Optimum temperature was 12-15°C, constant conditions being as effective as fluctuating day-night temperatures. Subsequent chilling at 3-6°C for 2-6 weeks enforced induction and synchronized and enhanced heading and inflorescence development. Long days were not essential for floral development although they significantly stimulated this process
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