Identification: What oak? Rounded lobes, leaves not tapered to petiole

We don't know if this tree was planted on this property on Samish Island, WA or if it's native here. Leaves are tough, shiny, around 13cm long with around 5-7 rounded lobes each side (my friend thought the leaf length and number of lobes ruled out Q. garryana), sinuses less than half the width of the leaf, petioles around 2cm (rules out Quercus robur), leaf bases sort-of auricular rather than being tapered to the petioles (rules out everything I know). Light green or glaucous leaf backs are not at all downy, and there are no obvious hairs at this point. It's a large tree that I didn't remember to deliberately photograph - it's the large one behind the Liriodendron.

 

I don't know, but I'd start with any of the white oaks. Starting with Quercus alba. ISU Forestry Extension - Tree Identification: White Oak (Quercus alba)
This site has a couple of other white oak family trees hyperlinked.
From a foraging standpoint re utility and edibility, knowing white oak family from red oak family is relatively important. Higher tannins in the pointed lobed leaf oaks.

 

Thanks, thanrose. I was looking under white oaks, haven't found a convincing match. A friend has sent a closer photo of the tree.

 

What about Quercus petraea, Durmast Oak? I read something about hairiness of the main veins yesterday that made me rule it out, but that seems to just be when the leaves open. (From Johnson & More, Collins Tree Guide, Harper Collins, 2004, p. 214). Or I see that there is Q. petraea x robur. I'm looking at photos on a Czech Botanicka Fotogalerie page named Q. robur var. puberula. Or this Hortus Camdenensis | Quercus robur L. var. sessiliflora page where it is called Q. robur var. sessiliflora, with Q. petraea given as a synonym. The sinuses seem to have the right amount of shallowness and the one acorn in my photo is appropriately sessile.

The people who built the cabin were Swedish; maybe they brought seeds?

 

I'm wondering about a hybrid between Pedunculate Oak and Garry Oak?

 

Thanks, Michael. I have no idea what that would look like or how I'd know.

I have a little more info on this, though. It was planted, probably around 1970 as a gift, was about the height of the people who planted it at the time. The son of the owner says that on his property a short distance away, he has an older tree of the same type that was planted in the 1940's. He said "it is called a European Oak". That would make it Quercus petraea.

I'll see if I can get him to send me acorn photos.

 

Here's an acorn from the older tree, FWIW. I guess all the ones in question have very similar acorns.

 

I don't see much evidence of Quercus petraea in it; there is Q. robur influence, in the auriculate leaf base, but if it is from Europe, then Q. garryana can be excluded. I'm familiar with Q. × rosacea (Q. petraea × Q. robur), and it has some similarity, a bit like one "on steroids" (thick shoots, extra large and glossy leaves), but overall, doesn't fit too well. One possibility is Quercus × kerneri (Q. pubescens × Q. robur), that might account for the "on steroids" characteristics.

 

OK, thanks Michael. I guess "European Oak" will have to do for a name.

 

FWIW, I wasn't able to find any old acorns, just new ones that had fallen from the tree, which I guess gives some idea what the cap would look like.