Winter
Luis Vallejo calls this tree a Spanish oak (Quercus faginea) though Wikipedia and some others refer to it as Portuguese oak (other names that popped up are Valencian oak and Lusitanian oak).  It belongs to Luis and resides at his Municipal Bonsai Museum of Alcobendas in Spain

We've got another Oak for you today. The last one was a live oak and this one is deciduous (Quercus faginea) shown over three seasons. It has several common names but we'll stick with Luis Vallejo's Spanish oak

Most oak bonsai we've seen in the States are live oaks. Their leaves tend to be smaller than deciduous oaks and therefore more suitable for bonsai. However, as we explore we're discovering that there are deciduous oaks with small leaves that are being used for bonsai. Particularly in Europe

The photos are from Luis Vallejo's Museo de Bonsai Alcobendas (Alcobendas is a suburb of Madrid). We've featured numerous trees from Luis'  Bonsai Museum over the years and will no doubt feature more over the coming years (scroll down for a link to Luis' remarkable bonsai collection)

Spring/Summer

Fall

Cropped for a closer look at the trunk. I'm not sure what the white on the bark is

Winter with companion. Before the snow 

 Quercus faginea growing in a field in Spain 
Wikipedia calls it a Portuguese oak rather than Spanish oak

Here's your link to Luis Vallejo's website