Aesculus turbinata – Japanese Horse Chestnut
Aesculus turbinata is a rare tree native to Japan, winter buds very resinous. Leaves like those of A. hippocastanum, consisting of five to seven stalkless leaflets, but more regularly toothed and tapering more gradually at the apex. On young plants the remarkable large leaves are obovate, and as much as 40cm long and 15cm wide,the whole leaf with its stalk to 65cm long. Panicles erect, 10-20cm high, with a stalk half as long. Flowers 2cm across, yellowy white, produced two or three weeks later than those of common horse-chestnut.Fruit without spines, but rough; broadly pear-shaped, 5cm wide near the top,tapering to a short, warted stalk. It is quite remarkable in spring when the new buds burst into life with a bright red flush turning over a few weeks to amber before resuming green.
Native of Japan up to 5,500 ft on the main island and in Hokkaido (Yezo). It is very similar in general appearance to A. hippocastanum, but hitherto has grown much more slowly. It is distinguishable by the different toothing of the leaf, still more so, of course, by the pavia-like fruits.