From Wikipedia, the free encyclopedia

The H'ylthri are a fictional other-dimensional, sentient plant race of the Marvel Comics Universe. They made a number of appearances in Marvel's Iron Fist and Namor comic titles.

Their bodies are vegetable fiber with few vital organs, making them difficult to injure. They possess superhuman strength to an unspecified level, can control other plant life, and extend both tangling vines or poisonous barbs to knock mammals unconscious. They can grow humanoid doppelgängers with the originals' personality and memories.

The H'ylthri evolved as a sentient plant race on an other-dimensional world. Nearly 2,500 years ago humanoid settlers built an outpost, K'un-L'un, in the mountains near an intermittent interdimensional bridge to Earth. Curious, the H'ylthri sent a humanoid duplicate to spy on them, but it was detected and beheaded. Further H'ylthri attempts to communicate were met with similar violence, until the H'ylthri came to hate the newcomers, viewing K'un-L'un as accursed, and slaying any who wandered too far from it. At some point both sides fell under the influence of Master Khan; the sorcerer maintained a balance of power, preventing either side getting an upper hand and using one to punish the other as his whims dictated.

In recent years the H'ylthri detected signals from Sam Smithers' first crude plant communications device on Earth. Trying to attack what they regarded as their enemies' birth world, they opened a dimensional portal to send through energies which enabled Smithers' device to control plant matter; Smithers became the super-criminal Plant Man.

H'ylthri History and Appearances list