Quercus garryana var. breweri

Brewer's oak is the dwarf form of Oregon oak. A bonsai or small garden oak. Easy to fit into a small garden. An excellent 'tree' for your leprechaun forest. Plant it in remembrance of someone you thought little of. (You think these are boring to read...)  Slow, do not expect feet per year, expect inch(s) per year. This is the bush to give to your grand kids.
Associated plants include; Arctostaphylos mewukka, Arctostaphylos viscida, Cercis occidentalis, Cercocarpus betuloides, Ceanothus cuneatus, Ceanothus integerrimus, Ceanothus  lemmonii, Cupressus macnabiana, Pinus sabiniana,
 Toyon, Quercus berberidifolia,  Quercus kelloggii.

This little tree can make an interesting deciduous hedge. If you plant them on about 3 foot centers and water once a week in about 10 years you'll have a hedge that most things can't get through.
Up in the Sierras I saw it in a 'grove' that was like a miniature enchanted forest. The plants were only about 4-5 ft. tall and in a circle making a 30 ft. opening to pretend you were a giant. They were in a spot that only got morning sun and I saw them in afternoon, Very magical.

(syn. Quercus breweri, Q. lobata ssp. fructocosa, Q. oerstediana)