Endemic Maples of Japan

Which are endemic maples of Japan ? i remember nine species ,but not the name ,please help me :)

 

I suggested these links in the "resources" sub-forum :

Japanese Maples

Plantes du Japon

 

'Excellent' and with a map for each, that is perfect .

 

Many thanks! :)

 

I'd love to add an Acer pycnanthum to my collection.

 

is a very interesting maple with amazing fall colors!! in my Aceretum there are two pycnanthum typical species and one variegated but revert :(
fall colors of mine politica,aceri e rock roll: Acer pycnanthum

 

Curiously neither of these links mention A. amamiense, and the first doesn't have A. amoenum? I didn't look more carefully, but A. morifolium also seems missing, which is curious.

Alex, my A. pycnanthum 'Asayake nishiki' has now also reverted, sadly. It's a nice green pycnanthum though. We have two other pycnanthums, but in our climate the fall color is pretty subtle. Really nice maple though.

 

Yano's 'Book For Maples' has a pretty comprehensive list for those with a copy.

 

some years ago i lost my Yano's book ,if someone know where is avalaible please write me!

 

The second link is mainly interesting because it has Japanese names.
In the first list, A. amamiense was pehaps considered as a synonym, or subspecies of A. diabolicum :

"-- Très proche :
A. amamiense T.Yamaz 2000 J. ***. Bot. 75: 28
diffère de A. diabolicum par les faces inférieures des feuilles et les pétioles qui sont glabres, les fruits à poils courts épars, et l'aspect souvent pourpré des feuilles et des fleurs ; Iles Ryukyu, au Japon (Ile Amami Oshima). Très rare : seulement 10 individus connus dans son habitat. En grand danger d'extinction (IUCN Red List catégorie : VU)."
(source : Acer diabolicum)
There is a location on a map here : Acer amamiense T.Yamaz.

It does, it's mentioned in the table listing the author's observations in different locations.

 

That's a hard loss, Alex! I wish you good luck in replacing the book, it is really hard to find.

Maybe, or maybe it simply hadn't been described yet, as the record dates only from 2000. It's an interesting site, but I think the issue with taxonomy is that it does chance rapidly, and it's necessary to find the latest information. For Acer, this is at the Maple Society, or at the International Dendrology Society. A. amamiense is certainly recognized as a distinct species now, but maybe wasn't when the site's were done. Helardot is simply incorrect according to current opinions.

Thanks for the gbif site which I haven't seen, very interesting on the collections. There is plenty of old data there though in terms of the taxonomy. The Maple Society now has the latest working list of synonyms publicly available at https://maplesociety.org/species-list/accepted-synonyms-list-for-acer/