Being new to the world of Japanese Maples I have been observing how all the leaves are reacting to the climate and getting a feel for when to water and when not to. One of these maples that has really captivated me is the Aesculus x neglecta 'Erythroblastos' Shrimp Pink Horse Chestnut. In the morning the long large leaves are fanned out. High noon they are slightly drooped down as if resting. As night comes around, they perk up again. I am curious about the scientific reason for this. Is it from the plant regulating the light/temp absorbed, or from it trying to scoop in moisture, perhaps both? Out of all the different ones I have this one is the only one that makes a drastic change in leaf shape during a day cycle so I have been sort using it as a gague for positioning them all to prep for summer.