[Illustration: LEAF FORMS]
Lanceolate
Ovate
Obovate
Star-shaped
Linear or Rectangular
Heart-Shaped or Orbicular
Oval
Elliptical
Deltoid
[Illustration: LEAF APEXES]
Acuminate
Acute
Obtuse
Truncate
Bristle Pointed
Rounded
[Illustration: LEAF MARGINS]
Entire
Dentate
Toothed or Serrate
Sinuate or Wavy
Doubly Serrate
Lobed
Incised
[Illustration: LEAF BASES]
Wedge-Shaped or Cuneate
Oblique or One-Sided
Rounded
Heart-Shaped or Cordate
Truncate or Square
[Illustration: THE COMPLETE FLOWER]
Stamen
Anther
Filament
Sepal
Receptacle
Petal
Pistil
Stigma
Style
Ovary
Peduncle
Sepals collectively designated as _calyx_.
Petals collectively designated as _corolla_.
The ripened ovary comprises the fruit.
Ripened ovules of the ovary comprise the seed of the fruit.
A flower lacking either calyx, corolla, stamens, or pistil is an
incomplete flower. If the male and female flower parts occur in separate
flowers on the same tree the species is said to be _monoecious_. If the
male and female flowers occur on separate trees, the species is said to
be _dioecious_.
[Illustration: FLOWER CLUSTERS]
Spike
Catkin or ament
Cylindrical cyme
Flat-topped cyme
Raceme
Panicle
Corymb
Umbel
Compound umbel
Head
[Illustration: COMMON TYPES OF FRUITS AND SEEDS]
Acorn (Oak)
Multiple Fruit (Mulberry)
Nuts in Prickly Bur (Beech)
Drupe (Cherry)
Pod (Locust)
Samara (Elm)
Samara (Ash)
Samara (Maple)
Cone (Pine)
Hairy Seed (Willow)
Nuts in Bladder-Like Bracts (Hophornbeam)
Berry (Persimmon)
Nut in Husk (Hickory)
A Nut-Like Drupe (Basswood)
Drupe (Hackberry)
Winged Seed (Pine)
Multiple Fruit—Achene Enlarged (Sycamore)
Nuts in Spiny Bur (Chinkapin)