Orctrap

Historical Background
Many Flytrap monsters have the suffix -trap, with the prefix being some creature. Orctrap would imply that this plant catches Orcs in it. That would be quite a considerable feat, a plant preying on one of the beastman races, especially since Orcs are larger than the Orctrap and would thus be difficult to devour. However, this name is likely not literal and may merely be an exaggeration or instance of creative naming.

Another possibility is that the Orcs, who are known to tame some of the wild creatures that inhabit Vana'diel, have tamed the Orctrap and it is a pet used to catch prey for the Orcs, but that would break the typical pattern of flytrap names.