Demontrumpets, as illuded to by the name, are not normal plants, but are plants who hold their origin in the Abyss. Perhaps brought by summoned demons, perhaps created by a dark god for some purpose, perhaps simple plants mutated by an artifact of great evil.
A large, ruby-red pepper, found in dry regions; much prized by alchemists and gourmands alike.
The blood of a dragon is vital in the creation of potions of longevity. The liver could used to cure any disease or ailment, while the heart could restore a PC to full and complete health, despite their age, or injury.