Water can pool on near vertical surfaces. If it has a little help.
Moss transforming a vertical surface into a series of horizontal ones
Bella Vista Hills
A lake doesn’t have to be continuous to fulfill its function of being a læk, a watering held so it can be used. I am fascinated at how moss allows itself to stretch and flow, taking on some of the characteristics of water, in order to hold it in the air, right in the sun. That’s pretty close to the magnificent manipulations of photosynthesis itself. Perhaps the two gestures arose from the same power.