The lamina is the flattened portion of the leaf. Lamina is synonymous with blade.
DIAGRAM: Leaf Cross Section / Leaf Cross Section
PHOTO:
Leaf
Cross Section /
Leaf Cross
Section /
Leaf Cross
Section
Leaf
Cross Section /
Leaf Cross
Section /
Leaf Cross
Section
Lateral buds are dormant buds found at a node that will grow into a stem when they break dormancy.
DIAGRAM: lateral bud
PHOTO:
DIAGRAM: Root Anatomy
PHOTO:
DIAGRAM: Woody Dicot Stem Morphology
PHOTO:
Lateral transport is transport of food products, water, and minerals out to the margin of the stem. Lateral transport as compared with axial transport is that axial transport is vertical and lateral transport is horizontal.
DIAGRAM: Leaf Cross Section
PHOTO: Leaf Cross Section / Fern Leaf Cross Section
DIAGRAM: Leaf Cross Section / Leaf Cross Section
PHOTO:
Leaf
Cross Section /
Leaf Cross
Section /
Leaf Cross
Section
Leaf
Cross Section /
Leaf Cross
Section /
Leaf Cross
Section
The leaf apex is the shape of the upper tip of the leaf lamina (the end opposite the petiole).
DIAGRAM: Leaf Apex
PHOTO:
DIAGRAM: Leaf Axil
PHOTO:
A leaf base is the shape of the leaf lamina at its base. As a general rule, this is where the petiole attaches to the lamina.
DIAGRAM: Leaf Bases
PHOTO:
Leaf buds are buds that develop into leaves when the weather becomes warm enough in the spring.
Leaf primordia are structures that are formed on the flanks (outer margin) of the apical meristem. These are the first cells that aggregate to form the beginnings of a future leaf.
DIAGRAM: Leaf Primordium
PHOTO:
Leaf scars are places on the stem where leaves used to be. Because leaves only live for a short time (usually one to five years) they are shed by the plant. When the leaf drops off it leaves a scar. The outline of that scar can be seen at the node. Within the outline of the leaf scar there will be bundle scars, the scars of the old vascular bundles that attached the leaf's vascular system to that of the plant.
DIAGRAM:
Woody
Dicot Stem Morphology
Leaf
Scar
PHOTO:
DIAGRAM: Sclerid
PHOTO:
Leaflets are the laminas of a compound leaf. Simple leaves contain only one lamina while compound leaves contain many lamina. Leaflets describe these many lamina of a compound leaf.
Lenticels are small places where the bark is pushed up in a lose fashion so that air can get to the cells of the stem for the purpose of respiration.
DIAGRAM: Woody Dicot Stem Morphology
PHOTO:
Lignin is embedded in the secondary wall of plant cells that are dead when functioning. Lignin typically stains red in prepared microscope slides. Fibers, sclerids, vessels, and tracheids are cells that contain lignin.
Ligule literally means tongue. It is typically a small flap of plant tissue that is tougue-shaped. In grass leaves, it is a short extension of the sheath above the blade.
DIAGRAM: Grass Leaf Structure
PHOTO:
Selaginella
Strobilus Longitudinal Section
Selaginella
Strobilus Longitudinal Section
Selaginella
Strobilus Longitudinal Section
Composite
Flower /
Composite
Flower /
Composite
Flower
Composite
Flower /
Composite
Flower
DIAGRAM: Liliaceae
PHOTO:
DIAGRAM: Chloroplast
PHOTO:
DIAGRAM:
PHOTO: Narcissus
(hormones)
The lumen is the opening or cavity of a cell that contains all the living material in the plant cell. The lumens cavity is produced by the cellulose of the cell wall.
DIAGRAM: Sclerid
PHOTO:
Lycopodium is a genus in the group of plants known commonly as the club mosses. These are tracheophytes that are in the division Lycophyta characterized by containing short side branches off the main rhizome. At the tip of the branches are a cluster of sporophylls that produce spores. This cluster of sporophylls is termed a strobilus. Lycopodium is homosporous.
DIAGRAM:
PHOTO: Lycopodium Strobilus Longitudinal Section
DIAGRAM: Golgi Complex
PHOTO:
