Ballistic Ivy
Hedera helix munitionis
This hardy variant of English ivy is prized by the more discerning gardener and tactical security coordinator for its ability to actually reinforce the vertical surfaces on which it climbs — to the point where even a new transplanting of Ballistic Ivy can repel small-arms fire after a mere year’s growth. A century’s worth of cultivation of this plant can produce an organic net that could shrug off an artillery shell. Or at least keep the blast from penetrating the ivy.