gioseppo 46099, Leaf fern, or membranous such as horsetail, only the water leek leaves are large and linear, but like other pteridophytes, they are sessile and only have a middle rib without a complete vein system according to the latest findings, tropical There are a few species of Lycopodium with simple branching leaf veins, sporangia are born in the leaf axils, large-leaf ferns, that is, true ferns, submerged leaves except locust leaves become fibrous roots, and the tip of the leaf axis of a few species It extends into a whip and can reach the ground to take roots, and the leaf shafts of some plants can grow indefinitely, and the rest are normal leaves.