Favoritos de guidingguida

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

Q. rubra

Q. rubra

Anemone cylindrica

Ranunculus fascicularis

Kishwauketoe Nature Conservancy

host: https://www.inaturalist.org/observations/212410997

Prunus americana

Anemonoides quinquefolia

Natureland Park

L biennis.

Leafy spurge

On Rubus, I think a bristle-berry sp. On an old (and beaver maintained) dike, wet soil

On prairie crab

P. Simplex

Thalictrum dioicum

Very tentative ID. Can't remember seeing this.

Bur oak

Hidden cells in Lactuca sp. stem (probably biennis). Collected.

On solidago in a beaver meadow.

Seems older due to coloration. On a beaked hazel tree.

On Eutrochium maculatum after dark in degraded wet prairie near shrub swamp.

Paper birch.

Cryptic bur oak acorn cap gall.

5/4: 1 adult
5/5: 3 adult
5/11: 5 adult
5/18: several adults upon return, some significantly large
Adults: https://www.inaturalist.org/observations/217601212

Compass plant petiole
5/3: 5 adult
Measured 1.9 mm

Same tree as here: https://www.inaturalist.org/observations/92896318
Quercus rubra/ellipsoidalis

Quercus rubra/ellipsoidalis

?

Emerged from hidden bur oak acorn cap similar to https://www.inaturalist.org/observations/195427761