Pam Gibbs wrote:

I have a crepe myrtle tree, not one of the shorter varieties, and not a
shrub, but a tree. Water drips from it constantly, as though it is raining.
Recently my daughter moved into an older home with a HUGE very old crepe
myrtle tree in the yard, and it rains under that one all the time too. It
is not honey dew from aphids. It's water, like rain. What is this
phenomenon? Thanks!

We've got a winged sumac where this happens, too...turns out that it's
some small beetles that sit atop the leaves, suck moisture out of
the leaves and squirt excrement all day long. It's really weird and
a touch unsettling.

---Prem