The Vegetable Lamb of Tartary (Latin: Agnus scythicus or Planta Tartarica Barometz) is a legendary zoophyte of Central Asia, once believed to grow sheep as its fruit. It was believed the sheep were connected to the plant by an umbilical cord and grazed the land around the plant. When all accessible foliage was gone, both the plant and sheep died.

Underlying the legend is the cotton plant, which was unknown in Northern Europe before the Norman conquest of Sicily.

Thomas Browne's Pseudodoxia Epidemica named it as the Boramez.

In Ephraim Chambers' Cyclopædia, Agnus scythicus was described as a kind of zoophyte, said to grow in Tartary, resembling the figure and structure of a lamb. It was also called Agnus Vegetabilis, Agnus Tartaricus and bore the reported endonyms of Borometz, Borametz and Boranetz.

In his book, The Vegetable Lamb of Tartary (1887), Henry Lee describes the legendary lamb as having been believed to be both a true animal and a living plant. However, he states that some writers believed the lamb to be the fruit of a plant, sprouting forward from melon-like seeds. Others, however, believed the lamb to be a living member of the plant that, once separated from it, would perish. The vegetable lamb was believed to have blood, bones, and flesh like that of a normal lamb. It was connected to the earth by a stem, similar to an umbilical cord, that propped the lamb up above ground. The cord could flex downward, allowing the lamb to feed on the grass and plants surrounding it. Once the plants within reach were eaten, the lamb died. It could be eaten, once dead, and its blood supposedly tasted sweet like honey. Its wool was said to be used by the native people of its homeland to make head coverings and other articles of clothing. The only carnivorous animals attracted to the lamb plant (other than humans) were wolves.

The Greek historian Herodotus wrote of trees in India "the fruit whereof is a wool exceeding in beauty and goodness that of sheep. The natives make their clothes of this tree-wool."

There is mention of a similar plant-animal in Jewish folklore as early as AD 436. This creature, called the Yeduah (ידוע, ידעוני, or אַדְנֵי הַשָׂדֵה), was like a lamb in form and sprouted from the earth connected to a stem. Those who went hunting the Yeduah could only harvest the creature by severing it from its stem with arrows or darts. Once the animal was severed, it died and its bones could be used in divination and prophetic ceremonies.

An alternative version of the legend tells of the "jeduah", a human-shaped plant-animal connected to the earth from a stem attached to its navel. The jeduah was believed to be aggressive, though, grabbing and killing any creature that wandered too close. Like the Barometz, it too died once severed from its stem.