Fine Spring Afternoon in the Woods

Beautiful spring day today.
I entered the North East Gate and wandered down the track to the western arm of the Tree Loop. The persimmon leaves are just coming out on the young trees there. The Wash at Island Crossing has pools of water above and below, but no flow.
The Woods has closed in with green. The sound of the traffic on Highway 9 is now quieter, muffled by the production of tons of leafy green biomass.

I walked to the North Rim trail and found one surviving Ailanthus Tree of Heaven, and then three more smaller - all in the same location where we four had uprooted all that we could find, a couple of years ago. I flagged all four with yellow, and will follow (and eventually eliminate before it can spread.)
The Woods' trails were in good shape, no standing pools of water remained, except in the far west, along Chautauqua. The East Pond depth had declined to 1.88 ft. Tomorrow, most of the Woods will be flooded. Forecast largest rainstorm of 2016 so far. Maybe 4 inches.
Along the Pipeline at the big cottonwoods, I was happy to see a giant swallowtail Papilio cresphontes.
At Tall Stump, there were three white-tail. Looked like a yearling and two larger does.
Along the East West Trail, I ran into Joe B, OU CompSci student, out to enjoy a walk  in the Woods.
Not too many flowers. I found Sisyrinchium, blue-eyed grass in bloom. Some Lamium purpureum dead nettle, small white flowers of Valerianella corn salad (along the south boundary road) and smaller white flowers of Cryptantha(?) Lots of Cardamine, bitter cress with its exploding seed pods.
One elm down across the trail near the swampy section by Chautauqua and the southern set of stepping stones along the trail, needs clearing.
Leaving the Woods I noticed a black hickory had a ring of young brown dead leaves surrounding each group of new green leaves. Looks like the tree may have broken bud in an early warm spell and then had a freeze cold enough to kill the new leaves. I'll have to look and see if there are other trees like this. I also noticed that several junipers had fairly widespread 'burned' branch tips with the distal centimeter of needles dead. I thought maybe Gymnosporangium cedar apple rust.. but might it have been a late cold snap?