The hanging pearls

An attempt to capture the result of a phenomena that I have been witnessing since ages. This particular plant, usually used as garden species, carries a very tiny droplet on the tip of the leaf, generally on the most smallest or fresh offshoot. The droplet starts generating early in the evening, generally around 10-15 mins from sunset(not sure if that has anything to do with it) and stays only near the tip. The formation generally was seen in full spheres, as seen in the frame. This time spotted dual droplet formations, one of which had on top rather than the bottom.
Would be helpful if anyone could share explanation for this phenomena, and also if this happens with other plants too, which has got tiny tipped leaves.

EXIF:
Canon 550D
Canon 100mm macro + Raynox DCR 250
F/16
Shutterspeed 1/125
ISO 800
Handheld, External flash fired

Location: Thane, captured at 1902hrs(Sunset at 1852hrs)

Very interesting observation. I have also seen it happen on some leaf tips. Good details. Thanks for sharing.