Workshop Part 1: Names  Workshop Part 3: Keys   Workshop Part 4: Keys   
Workshop Part 5: Weber Arnica key   Workshop Part 6: Keys and species

Part 2A: Leaf Shapes

TO 2B, LEAF VENATION AND ARRANGEMENT
TO 2C, LEAF MARGINS AND SURFACES

Sections 2A, 2B, and 2C explain leaf morphology.
For flower morphology, see the following excellent pages in Wayne's Word:
Click for inflorescences

Click for flower shapes

Simple leaves, i.e., leaves are not divided, not "compound".

  Lycium pallidum

Besseya ritteriana   

Anticlea elegans

 


Compound leaves, i.e., leaves are divided into leaflets.

Pinnately (feather-like) compound

    

Astragalus mollissimus

 

   Bipinnately compound
(Leaves are cut into leaflets which are cut again.)

Ligusticum porteri

 

Palmately compound

Lupinus pusillus

 

     Ternately compound

Lomatium triternatum

How does one know where the leaf begins?  In the photo immediately above, how do we know
that there are just three leaves, not nine or twenty-seven leaves?

TO 2B, LEAF VENATION AND ARRANGEMENT
TO 2C, LEAF MARGINS AND SURFACES

Workshop Part 1: Names  Workshop Part 3: Keys   Workshop Part 4: Keys   
Workshop Part 5: Weber Arnica key   Workshop 6: Part Keys and species