In the last few days I have had a stunning example of the extent of this
phenomenon. I have been doing a bit of reglazing and reconstruction of the
little lean-to at the back of the house and this involves removing large panes
of glass. Ouch! The panes are 16" by 56" and while doing this and that I
place the pane flat on the grass. On carefully picking it up about an hour
later the water on the underside positively *runs* off the glass. There has
been only 4 mm rain here in the last fortnight and the grass seems dry. It
hardly seems to matter whether the sun is out or not. It's transpiration
without the evapo.

With nicely sliced fingers, Tudor Hughes, Warlingham, Surrey.