Basswood Leaf

Photo Fact Sheets

  • 2050+ High Resolution Photos
  • 205+ Woody Species
  • Searchable, Sortable, Downloadable

Quiz Logo

Interactive Quizzes

  • Identify Photos
  • Practice Scientific Names
  • Learn Morphology

Morphology Logo

Photo Glossary

  • Illustrated Photos
  • Learn Morphology
  • Real Examples Shown

LEAVES | Complexity | Arrangement | Shape | Venation | Apices | Bases | Margins | Lobes

TWIGS | Bud Types | Bud Scales | Scars | Surface | Pith

FRUITS | Types

 

Leaf Morphology: Arrangement

how leaves are positioned relative to one another on the twig

Alternate only a single leaf is attached at each node
Opposite two leaves are paired at the same height, one on each side of the twig
Whorled more than two leaves are found at the same node

 

Hold cursor over photos to view species name and info

 

Alternate

only a single leaf is attached at each node

  • Ulmaceae Celtis laevigata - sugarberry: Leaves, alternate, simple, inequilateral leaf base, distinct primary veins forming a 'W'.
  • Magnoliaceae Magnolia virginiana - sweetbay: Leaf, alternate, simple, leathery, semi-evergreen, back side covered in silver fuzz.
  • Cornaceae Nyssa sylvatica - blackgum: Leaf, alternate, simple, occassionally toothed.
  • Betulaceae Ostrya virginiana - hophornbeam: Leaf, alternate, simple, doubly serrate margin, parallel venation.
  • Rosaceae Prunus angustifolia - Chickasaw plum: Leaf, alternate, simple, often clustered on short shoots, typical display folded longitudinally.
  • Fagaceae Quercus alba - white oak: Leaf, alternate, simple, lobed but depth and number of lobes are extremely variable.
  • Fagaceae Quercus phellos - willow oak: Twig showing alternate leaf arrangement, delicate with small clustered terminal buds.
  • Tiliaceae Tilia americana var. caroliniana - Carolina basswood: Leaves, alternate, simple, cordate in shape, margin coarsely serrate.
  • Ulmaceae Ulmus rubra - slippery elm: Leaf, alternate, simple, elliptically shaped, doubly serrate, very sandpapery (scabrous) both above and below.
  • Vitaceae Vitis aestivalis - summer grape: Leaf, alternate, simple, ranging in size and shape, from round and unlobed to deltoid and lobed.

 

Opposite

two leaves are paired at the same height, one on each side of the twig

  • Aceraceae Acer floridanum - Florida maple: Branch with twigs showing opposite leaf arrangement.
  • Aceraceae Acer palmatum - Japanese maple: Twig showing opposite leaf arrangement and last year's growth, which emerged from paired terminal buds.
  • Oleaceae Chionanthus virginicus - white fringetree: Twig showing opposite to subopposite leaf arrangement.
  • Cornaceae Cornus florida - flowering dogwood: Fruit, drupe, initially green, becoming bright red.
  • Celastraceae Euonymus americanus - strawberry bush: Leaves, opposite, simple, narrow.
  • Loganiaceae Gelsemium sempervirens - evening trumpetflower: Leaves, opposite, simple, narrow, on a red twining vine.
  • Oleaceae Ligustrum sinense - Chinese privet: Leaf, opposite, simple, semi-evergreen, small (less than 2 inches long).
  • Rubiaceae Mitchella repens - partridgeberry: Fruit, drupe, formed from two flowers as evidenced by two white dots on each drupe.
  • Caprifoliaceae Sambucus nigra ssp. canadensis - American black elderberry: Twig showing alternate leaf arrangement, lenticels.
  • Caprifoliaceae Viburnum nudum - possumhaw viburnum: Twigs showing opposite leaf arrangement, distinctly long terminal buds with valvate scales.

 

Whorled

more than two leaves are found at the same node

  • Bignoniaceae Catalpa speciosa - northern catalpa: Twig showing whorled leaf arrangement.
  • Bignoniaceae Catalpa speciosa - northern catalpa: Twig showing whorled leaf arrangement.
  • Rubiaceae Cephalanthus occidentalis - common buttonbush: Twig showing whorled leaf arrangement.  Leaves are more often oppositely arranged, and are variable on a single tree.
  • Rubiaceae Cephalanthus occidentalis - common buttonbush: Twig showing whorled leaf arrangement.  Leaves are more often oppositely arranged, and are variable on a single tree.

All definitions are from J. W. Hardin, D. J. Leopold, and F. M. White. (2001). Harlow & Harrar's Textbook of Dendrology. Ninth edition. McGraw Hill, New York, New York, 534 pp. ISBN: 0073661716.

LEAVES | Complexity | Arrangement | Shape | Venation | Apices | Bases | Margins | Lobes

TWIGS | Bud Types | Bud Scales | Scars | Surface | Pith

FRUITS | Types

Hits: 11829

Site Statistics

Species: 207 | Genera: 122 | Families: 67

All Photos: 2063 | Leaf Photos: 622 | Twig Photos: 511 | Bark Photos: 353 | Fruit Photos: 274 | Photos per Species: 10.0

Other Links @ SFA

Contact Dr. Stovall | Stovall Lab @ SFAForestry @ SFA  | Silviculture @ SFA