Barbed Thermotropic Vine
Their non-Tyranid variation - Thermotropic Vine grows on cold planets where heat is valuable recource. They adapted to it by sending tendrils to any warm object, seizing it and growing rapidly around it to create another clump of vine. Actually vines don't kill their victim, but prevent it from moving, slowly leaching out its warmth.
- 1: White Dwarf #254 (US), "Hostile Terrain" by Pete Haines
- 2: Warhammer 40,000: Rogue Trader, pgs. 218-219