I’ve completed four dissections and I include links below from Thinglink. I may try to add a pic or two of habitat but otherwise they are relatively complete. I’m frustrated I can’t figure out the species of rose, but it’s likely a horticultural variety. Also, I’ve never used Thinglink but seem to have the hang of it.
Here is an Asteraceae, curlycup gumweed (Grindelia squarrosa) and a nice cross section through the inflorescence.
The fourth one is a member of the Rose family (Rosaceae), check it out in Thinglink.