Abstract
‘Kawazu-zakura’ (Prunus lannesiana Wils.) is the representative early-flowering cherry in Izu peninsula. The time of flowering was recorded to examine the relationship between flowering time and air temperature in Minamiizu.
‘Kawazu-zakura’ trees in the Minamiizu region generally bloomed earlier at warmer places. The time of flowering ranged over about one month among various sites. The average flowering time in these regions showed a range of about two weeks. The appreciable flower life defined as the period from two tenths blooming to full bloom was comparatively long at eighteen days. The flowering time showed a high negative correlation to the temperature average for 51 to 70 days before flowering. Maintenance of continuous flowering over a prolonged period was noted at the Aono river embankment (Minamiizu-cho) and at Tanaka (Kawazu-cho).
