Saw a post from a member named quercus_macrocarpa so thought at the minimum this person would enjoy a few photos.

These are from Starhill Forest Arboretum in Petersburg IL at Author Guy Sternberg's home/offical arboretum of Illinois College, a month ago. You can read about Guy Sternberg here: Wikipedia Biography and the link to Starhill Forest Arboretum: Starhill Forest Arboretum

Quercus x sternbergii

"It's a nothospecies -- a stabilized hybrid of Q. shumardii x Q. buckleyi that's found naturally in a narrow band in Texas where the two species are barely sympatric. It was named for me by Professor Reinhold Luebbert of Germany in his World Compendium of oaks. Expect medium size pyramidal habit, small leaves and acorns, and brilliant scarlet fall color. It's perfectly hardy here for us once you get a little growth on it, but I'd protect small seedlings for a year or two." (we're near Peoria, IL)

Guy S.

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Quercus x saulii 'Montalba' (7" hand)

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One of their cultivar introductions:

Quercus x 'Chimney Fire' (robur var. Fastigiata x bicolor) x alba

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'Chimney Fire'

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Another selection:

Quercus x 'Birthday Candle'

(robur var. Fastigiata x bicolor) x alba

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'Birthday Candle'

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From the above two were seed-grown, crossed by Quercus alba, and grown from seeds of this tree.

Quercus robur var. Fastigiata

Guy stands below:

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Another Sternberg introduction:

Quercus nuttallii 'New Madrid' leaves emerge purple. you can read about it at the link to the arb. above.

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Quercus robur 'Salicifolia' (Salix-like/Willow-like

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'Salicifolia'

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Quercus dentata

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Quercus dentata (7" hand)

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Quercus dentata bark:

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Quercus vilmoriniana (dentata x pentraea)

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Quercus vilmoriniana (dentata x pentraea)

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Quercus x vilmoriniana (dentata x pentraea)

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Other trees of Interest:

Betula uber (good quick read) very rare and a special, federal-license is needed in order to propagate this tree:

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Betula uber Roundleaf birch

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Juglans nigra 'Laciniata'

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'Laciniata' a small garden Black walnut lawn tree.

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Not at the Arboretum:

Quercus macrocarpa @ 275 years old

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Same tree: Quercus macrocarpa 275 years old

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Adjacent to this specimen, another Quercus macrocarpa (Bur Oak). It is also 275 years old:

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Liriodendron tulipifera (planted at the time of Abraham Lincoln's burial)

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Populus lasiocarpa:

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Dax