Tree Blog

Quercus trojana | Stanford

Seedlings of the tree shown in the previous entry have been tested around the Bay Area. Here we see a purported Quercus trojana sapling, growing in a dry location at Stanford. The soils in this area are terrace alluvium, and can support drought adapted trees. Q. trojana seedlings, as shown here, show a very limited degree of hybridization, a rarity for seedling grown from Shields Grove acorns. The offpring retain the symmetrical, upright growth habit of the mother tree, with some showing limited introgression from the Bur Oak (Q. macrocarpa) surrounding the mother tree. 

Dave Muffly