In the group of Acer tschonoskii, there are Acer micranthum and Acer tschonoskii in wide meaning. When we observe Acer tschonoskii in detail, we can see not only standard species Acer tschonoskii which inhabit the subalpine zone north of Central Japan, but also Acer tschonoskii ssp. australe inhabiting south of Northeastern district in Japan.
L: Acer tschonoskii, C: Acer australe, R: Acer micranthum
Images of leaves
Yellow leaves in the side of Mt. Mizugaki Yamanashi Pref. Oct.10, 2005
Leaves of Acer australe at Shirabiso pass Nagano Pref.(Sep. 15, 2008)
Fruits with red wings of Acer australe at Shirabiso pass Nagano Pref.(Sep. 15, 2008)
Flowers of Acer australe around Araragiyama on the border between Saitama and Tokyo
Autumn colors of Acer australe at Shirabiso Highlands Nagano Pref.
Comparison of Acer micranthum and Acer australe
Left : Acer micranthum, Right : Acer australe
Change from seed leaf to true leaf for about a month