what are the different kinds of leaves?
['Ferns have fronds.', 'Conifer leaves are typically needle- or awl-shaped or scale-like.', 'Angiosperm (flowering plant) leaves: the standard form includes stipules, a petiole, and a lamina.', 'Lycophytes have microphyll leaves.', 'Sheath leaves (type found in most grasses and many other monocots)']