Page 21 - Forest Trees of Maine
P. 21

LEAF STRUCTURES



             Blade                                Leaflet
                                     Rachis
            Leaf          Midrib

                           Petiole
                                        Petiolule
                           Stipule     Petiole
                                                  Bud
                          Bud
                       Stem
                  Simple Leaf        Pinnately Compound Leaf  Palmately Compound Leaf

            NEEDLE TYPES                                   TWIG STRUCTURE


                                                                         Terminal Bud

                                                                        Leaf Scar

                                                                          Lateral Bud

                 Needle-shaped    Scale-shaped    Awl-shaped            Lenticel




                                                                       Bud Scale
                 FLOWER TYPES                                          Vascular Bundle Scar
                                                                        Terminal Bud Scale Scar


                                                                       Pith
                       Peduncle                                   Pseudoterminal Bud
                                                            Leaf Scar
                                                                       Stem Tip
                       Pedicel



                 Raceme                  Spike           Panicle (of Racemes)











                   Cyme                             Umbel                                    Corymb

                                                                    GL OSSAR Y  19
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