Basswood Leaf

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

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

FRUITS | Types

 

Twig Morphology: Bud Scales

modified leaves or stipules that cover and protect the bud

Imbricate Scales numerous scales overlappping one another in shinglelike fashion
Valvate Scales two or three scales that do not overlap
Caplike Scale a single scale covering a bud that sloughs off in the spring, leaving a terminal bud-scale scar
Naked (No Scales) a bud with no scales

 

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Imbricate Scales

numerous scales overlappping one another in shinglelike fashion

  • Hippocastanaceae Aesculus pavia - red buckeye: Twig with opposit
  • Fagaceae Fagus grandifolia - American beech: Twig showing alternate leaf arrangement and long, pointy, cigar-like buds.
  • Hamamelidaceae Liquidambar styraciflua - sweetgum: Twig showing
  • Fagaceae Quercus velutina - black oak: Twig showing alternate le
  • Celastraceae Euonymus americanus - strawberry bush: Twig showing
  • Ericaceae Rhododendron oblongifolium - Texas azalea: Twig showin

 

Valvate Scales

two or three scales that do not overlap

  • Betulaceae Alnus serrulata - hazel alder: Twig showing alternate
  • Magnoliaceae Liriodendron tulipifera - yellow-poplar: Twig showi
  • Caprifoliaceae Viburnum nudum - possumhaw viburnum: Twigs showin

 

Caplike Scale

a single scale covering a bud that sloughs off in the spring, leaving a terminal bud-scale scar

  • Platanaceae Platanus occidentalis - American sycamore: Twig showing leaf scar that completely encircles buds.  While leaf is on the twig, the bud is protected within the petiole.
  • Platanaceae Platanus occidentalis - American sycamore: Twig showing leaf scar that completely encircles a bud with a single, cap-like scale.

 

Naked (No Scales)

a bud with no scales

  • Annonaceae Asimina triloba - pawpaw: Twig showing alternate leaf arrangement and naked maroon terminal bud.
  • Juglandaceae Carya cordiformis - bitternut hickory: Twig showing alternate leaf arrangement and naked, distinctly sulfur yellow terminal bud.
  • Rhamnaceae Frangula caroliniana - Carolina buckthorn: Terminal bud, naked, yellow to brown, fuzzy.
  • Magnoliaceae Magnolia virginiana - sweetbay: Terminal bud, silvery tomentum, conspicuous.

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

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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

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