..but it's been much too long since I last played a wildie-character; what's the command to pick a plant of it's bounty?
Try examining the plant.
If that doesn't give you a hint of what to do, try to 'break' it.
If that doesn't work, try 'pick <keyword>'
Don't try pick <keyword>, it'll tell you you're picking a lock, though it will be awkward, yet hilarious, if anyone comes across you.
Do pick <item> <keyword>
pick fruit bush
Usually looking at the plant will tell you if you can break it for bounty, also sometimes you can try to look IN plant for help too!
To expound on using 'pick' to get something from a plant.
If you look at or examine a plant, it will tell you that something can be picked. If so, it will tell you what can be picked. At this point you would, as others have said do the following:
> pick (pickable) (plant)
Exa plant
pick <whatever> plant
g <whatever> plant
break plant
g plant
That covers just about all you can do to a plant.