Elderberry seems to be an interesting one as far as classification goes; I've seen the blue(cerulea) sometimes classed as a species, and sometimes considered a subspecies of the black (Sambucus Nigra), and apparently the same goes for the Canadensis you have... Certainly the cuttings you've got look extremely similar to my Sambucus Nigra cuttings.
The red(Sambucus racemosa) is very common in my area, but I've seen exactly one wild blue elderberry ever. It's a bit late in the season here, but I'll be trying to get some cuttings from it in a couple days, since I'll be somewhat nearby.
I've read that the otherwise toxic red can be consumed safely if you remove the seeds, but I haven't tried it yet...
Dan Boone wrote:Well, I consider roadside bushes a sort of community property. If I take cuttings, what does that do to a berry harvest one of my neighbors might be expecting to rely on?
I agree entirely that it's community property, but I suppose I would err in the direction of using it rather than not, because in my unscientific experience the odds are it would just go unused otherwise! While I wouldn't want to take more than a fair share, <2% of a healthy plant seems a very reasonable quantity in the apparent absence of major resource competition!
I also do my best to take cuttings that would otherwise be a problem; crossed branches, ones that will be in the way of traffic, etc...