Cover Art of Swamp Thing (1986) #100.
*Once, when humans trapped Swamp Thing outside the green, his spirit drifted offworld, instinctively seeking - and finding - the nurturing Life-Webs of other planets. No longer sensing his presence on Earth, the Parliament of Trees believed him to be dead. They undertook to create his successor, an embryonic elemental they called the Sprout. When Swamp Thing returned home, he and Abby mixed procreation with magic to make the Sprout their child. Altered by birth, the infant girl, Tefe, became the first human elemental, possessed of uncanny - and dangerous - powers over flesh. For a time, the three lived as a family. *Source: Back of card