Okay that reference was a bit of a stretch.
Found a single example of Hydrocotyle verticillata growing along the silty shore of a small stream near my house (positively ID'd by the completeness of the leaf compared to other H. species that might have crept into the region).
I did a search but there doesn't seem to be much written on this forum about it. Has anyone got some experience with this plant? I've seen the listings on retailer sites and read a few posts elsewhere, but most people seem to use H. leucocephala (Brazilian Pennywort) which has a different growing habit. Those who have used H. verticillata almost always employ some kind of "high tech" approach with supplemental CO2, fertilizers, and high lighting. I'd love to hear some other experiences with this one. Does it do okay as a floater in lower light conditions? Do the roots attach to hardscape? Does it have a kryptonite in the form of any particular water conditions?
Also, how might I best and most responsibly collect pieces from this one plant? I'd rather leave enough behind for it to keep growing and spreading. if I only take small cuttings, should I let them "grow out" a bit first before trying to use them in a tank? Would it be a good idea to cut and replant some pieces in situ to try and get more individual plants growing in the creek?