types:
cataphyll
a reduced or scarcely developed leaf at the start of a plant's life (i.e., cotyledons) or in the early stages of leaf development
pitcher
(botany) a leaf that that is modified in such a way as to resemble a pitcher or ewer
blade,
leaf blade
especially a leaf of grass or the broad portion of a leaf as distinct from the petiole
frond
compound leaf of a fern or palm or cycad
pad
the large floating leaf of an aquatic plant (as the water lily)
scale,
scale leaf
a specialized leaf or bract that protects a bud or catkin
compound leaf
a leaf composed of a number of leaflets on a common stalk
entire leaf
a leaf having a smooth margin without notches or indentations
serrate leaf
a leaf having a margin notched like a saw with teeth pointing toward the apex
erose leaf
a leaf having a jagged margin as though gnawed
runcinate leaf
a leaf having incised margins with the lobes or teeth curved toward the base; as a dandelion leaf
parted leaf
a leaf having margins incised almost to the base so as to create distinct divisions or lobes
rosette
a cluster of leaves growing in crowded circles from a common center or crown (usually at or close to the ground)
megasporophyll
in non-flowering plants, a sporophyll that bears only megasporangia
microsporophyll
in non-flowering plants, a sporophyll that bears only microsporangia
sepal
one of the green parts that form the calyx of a flower
lily pad
floating leaves of a water lily
palmate leaf
a leaf resembling an open hand; having lobes radiating from a common point
pinnate leaf
a leaf resembling a feather; having the leaflets on each side of a common axis
cuneate leaf
a wedge-shaped leaf having the acute angle at the base
hastate leaf
a leaf shaped like a spearhead with flaring pointed lobes at the base
lanceolate leaf
a leaf shaped like a lance head; tapering to a point at each end
lyrate leaf
a simple leaf having curvature suggestive of a lyre
obtuse leaf
a simple leaf having a rounded or blunt tip
oblong leaf
a simple leaf that is rounded at each end with parallel sides
obovate leaf
an egg-shaped leaf with the narrower end at the base
ovate leaf
an egg-shaped leaf with the broader end at the base
perfoliate leaf
a leaf with the base united around--and apparently pierced by--the stem
spatulate leaf
spatula-shaped leaf; having a broad rounded apex and narrow base