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.

Let's show the group of Acer tschonoskii

UL: Acer tschonoskii, UR: Acer micranthum
LL: Acer australe, LR: Acer koreanum

Let's compare the three species in Japan.

L: Acer tschonoskii, C: Acer australe, R: Acer micranthum

L: Acer tschonoskii, C: Acer australe, R: Acer micranthum, on Mar. 27, 2006

Here, I will show you Acer tschonoskii from Akita Pref.

Buds of Acer tschonoskii shown in the center, at Mt. Moriyoshi, Akita Pref.

Yellow color of Acer tschonoskii at Mt.Moriyoshi Akita Pref.

Yellow color of Acer tschonoskii at Yachi spa Aomori Pref.

Yellow color of Acer tschonoskii at Yachi spa Aomori Pref.
UL: yellowleaves, UR: Winter buds, LL: a young tree, Autumn color of adult trees

Let's show you Acer australe from Nagano Pref. for comparison.

Flowers of Acer tschonoskii ssp. Australe, at The Shirabiso Pass, Pref. Nagano

Flowers of Acer tschonoskii ssp. Australe

A : Acer tschonoskii ssp. Australe, D & E : Acer micranthum