There are about 12,000 species of fern. Growing Up Ferns grow best in moist, humid habitats with low light. They are very common in rainforests. Ferns have delicate leaves called fronds . They start out curled in a tight ball that opens as the frond grows.
Ferns have horizontal stems called rhizomes .
Their roots grow out of the rhizome. Large and Small Ferns come in all sizes. The tree fern grows in he tropics and subtropics. More Spores Ferns don't have seeds, they have spores . The spores are usually on the underside of the fronds.