Acer palmatum 'Seiryu'

Acer palmatum 'Seiryu'
Japanese Maple 'Seiryu'
Momiji 'Seiryu'

Whereas most dissectum maples have a weeping habit, this cultivar is unusual because of its upright growth habit, as well as its ability to ramify, and preserve interior branching

It is a relatively unexplored variety in bonsai cultivation.  A cultivar for the curious!