I imagine one of these days I’ll be accused of over-representing maples on BPotD, but my excuse will be that they’re perfect for illustrating autumn colour.
Though you might associate Acer japonicum with the common name Japanese maple, that moniker instead refers to Acer palmatum. Acer japonicum is instead commonly known as fullmoon maple or downy Japanese maple. Specialist vendors of Japanese maples will likely sell cultivars of both of these species, though (as well as Acer shirasawanum), since they broadly resemble each other.
I’ve decided to use ‘Aconitifolium’ (= leaves like aconite, or monk’s-hood) as the cultivar name for this entry because it is the name typically used on public garden or retail labels. However, this cultivar was developed in Japan, and I guarantee the original name wasn’t derived from Latin. Supposedly, the translation of its Japanese name means “dancing peacock” in English, suggesting that its cultivar name should be ‘Mai kujaku’ (source), but even that has been altered so that it is instead sometimes sold as ‘Maiku jaku’ (apparently a nonsense name in Japanese).
Photographs of this cultivar throughout the seasons are available in this thread in the Maple Photo Gallery, thanks to the contributions of a number of maple enthusiasts.
As an aside, I’ve become very interested in abstract photography lately thanks to Freeman Patterson. All of the abstracts I’ve done so far have been “in-camera”. I hope you don’t mind if I share the occasional one in accompaniment to a more documentary-style image.
Photography resource link: for inspiration, the photography of Roman Loranc. In particular, investigate the photographs of trees for outstanding images of Californian oaks.