Leaves have three main parts: the base, petiole, and lamina. They come in two configurations - simple or compound. Simple leaves have a single blade while compound leaves are divided into smaller leaflets. Leaves are also classified by their margins, venation patterns, shapes, bases, and arrangement on the stem. Their structure is adapted for functions like photosynthesis, storage, reproduction, and carnivory.

1. Leaves By : Geonyzl Lepiten

4. Compound leaf

5. Primary division of leaves ( types of leaf configuration ) Simple Compound http://www.butler.edu/herbarium/treeid/treeparts.html

8. Classification by Leaf Arrangement on the Stem Opposite : If each node has a pair of leaves 180 degrees apart. Alternate : Each node has a single leaf and the leaves of adjacent nodes point different directions Whorled : If a node has three or more leaves attached.

12. Leaf Shape Bilobed Bauhinia variegata Cordate Ivy Elliptical, oval Ficus pumila Lanceolate Codiaeum variegatum Linear Iris tectorum Needle-shaped Pinus massoniana General shape

13. Oblong Ficus elastica Ovate Hibiscus rosa-sinensis Sagittate Mikania micrantha Auriculate Arabis caucasica oblanceolate Ilex glabra spatulate Myrica pensylvanica

14. palmately lobed pinnately lobed scale-like awl-like

31. Simple Leaves - Margin Structure

35. Other types of compound leaves

37. Other structures for comparison

44. Other succulent leaves Aloe mitriformis

45. Selaginella Bracts – ex Poinsettia

48. d. Bladderworts b. Sundews c. Venus’s Flytrap s