I have a couple summer projects in mind here that involve plants with really really tiny flowers. I'm planning to make a series of markers, or I'll never find the seeds.. i.e. one of "This Plant", one for "This Section/Branch" etc... but how does one go about marking individual ovaries when the pedicels are way to small to tie any kind of visible string to? Is there a safe, weatherproof paint or something that can be used on most plants? I've noticed that my tree-seal works, but it's not exactly practical to mark with a black-brown color :/

I've also thought about removing all but the flowers I'm working with on a stem, but that seems risky and impractical.

I'm talking about things with small clustered flowers like thymes.

Vincent