The spores that become Scarlett Call can lay dormant for ages. They only sprout when the soil they are in is disturbed and hemogloblin (or some other blood elements) are mixed in. Once they do sprout, they sprout with a vengence.
These plants are quick growing, but not supernaturally quick despite the bardic tales. The green vines remain low to the ground, and flower with small bright scarlet flowers. In fact the low vines are runners, inserting new tap roots into the ground every foot or so. This makes an latice of strong vines that make going in an “infected” field difficult. The low vines are vile as they are slightly sharp (with tiny spines) and slightly sticky (some people feel them as an itchy sting, being allergic to them) The plants are not edible by any beast except when the plant is old and after has released a cloud of spores to the wind. The Wound, what a field of Scarlett Call is called, continues to prosper for a time based on the amount of blood in the soil, a few months if it is just a bloody predator kill to years in the case of a battlefield.
The presence of Scarlett Call denotes the presence of battles, executions, evil rituals, or where local hunters (or predators) have killed and gutted animals without care.
Also known as The Scarlet Call (Scarlett is a proper noun), Blood Tangle, Tryms Mark (Trym being a god of Battle), Hunter’s Eye (so called because they are used to spot where predators have made kills), Krell’s Mark (Krell being an Evil Spirit whos worship has to deal with blood), Widow’s Tears, and Earth’s Wounds.