Light Stalk



The Light Stalk is a plant found commonly around Xen. It consists of a reddish-brown stalk around four feet tall, with a small bulb on top that shines bright yellow. It dims its light, shrinks back, and shakes rapidly whenever approached. It is sometimes found near Xen Fungi. In Opposing Force, Light Stalks can be seen several times in the Black Mesa Research Facility by Adrian Shephard: in the chapter Missing in Action, where Xen flora seems to invade the facility, and in Vicarious Reality, where it can be seen in glass cases near Xen Fungi and the Barnacle gun, Xen flora being also studied by Black Mesa.

Behind the scenes
The Light Stalk model can be found in the playable Half-Life 2 Beta files. Although it cannot be seen in the playable beta levels, it was at least to be seen in the underground levels of the Combine Factories.