Favoritos de guidingguida

on Salix bebbiana

On Bur oak

Very tentative ID. Of host too.

on Oak

This looks similar to the goldenrod midge gall but is on a sawtooth sunflower. Not sure what it is?

On Bur oak

I think...
on Elm

Very tentative ID

Q rubra. Not sure about these. They do not look like globosa. On an old Northern Red Oak with 2 other types of galls.

Viburnum rafinesqueanum

cornus canadensis.

Leaf mine enters petiole and continues into stem surface.

On Spotted Smartweed (Persicaria maculosa).

Found on Chinkapin Oak leaves.

On daisy fleabane

On Showy Goldenrod.

?? on Malus ioensis

S. integrifolium - tiny little pimple close to the leaf margin, single larva contained within. Preserved in 95% etOH and en route to @louisnastasi

On Cyperus x mesochorus and Cyperus lupulinus

Lespedeza capitata

Maybe E vaccinii? Host is lingonberry

Tilia americana. These were quite flat, and some had small openings on the leaf underside.

sorbus.

Hackelia virginiana

??? Unsure of this ID. On Viburnum opulus americanum

Vaccinium macrocarpon

Vaccinium angustifolium.

On Erigeron strigosus (inflorescence of host plant in third picture)

common hackberry

On ash?

N. Pin oak.

Erigeron host.

Bur oak host.

On Pin Oak

?

On Evening Primrose species.

Lycopus americana

observation for plant: https://www.inaturalist.org/observations/221914948

On Lysimachia borealis

Rosa blanda

Thalictrum dasycarpum

On Pin Oak

A 'tapered swelling'

On Pin Oak sharing leaf with marginal leaf roll.

Ranunculus hispidus

Betula nigra

Q ellipsoidalis, healthy young tree.

Upper and lower leaf face are shown. The galls are flat and slightly puckery, pink and rimmed.

host here https://www.inaturalist.org/observations/218539712

I think the host is goldenrod, and I think this is the appropriate species of rust

emerged from rearing chamber of cryptic L. biennis stem galls.

Q. rubra