LeavesLeaves

HortBotany

Leaf morphology• Arrangement (look for bud)

•Alternate•1 leaf for each node• Betula spp., Cercis spp., Quercus spp., Gleditsia spp. Ulmus spp.

Leaf morphology(arrangement)

Leaf morphology• Arrangement (look for bud)

•Opposite•2 leaves for each node•Acer spp., Cornus spp., Fraxinus spp., Viburnum spp.

Leaf morphology(arrangement)

Leaf morphology• Arrangement (look for bud)

•Subopposite•2 leaves for each node•Lagerstroemia indica

Leaf morphology(arrangement)

Leaf morphology• Arrangement (look for bud)

•Whorled•3 or more leaves for each node•Catalpa spp., Hydrangea spp., Nerium oleander

Leaf morphology(arrangement)

Leaf morphology• Leaf types

•Angiosperm•Simple•Bud in leaf axil of single leaf•Acer spp., Betula spp., Cornus spp., Quercus spp., Ulmus spp.

Leaf morphology(angiosperm leaf types)

Leaf morphology• Leaf types

•Angiosperm•Compound•Bud in leaf axil of more than one leaflet

•Aesculus spp., Fraxinus spp., Gleditsia spp., Pistacia spp.

Leaf morphology(Angiosperm leaf types)

Leaf morphology(Angiosperm leaf types)

Leaf morphology(Angiosperm leaf types)

Leaf morphology(Angiosperm leaf types)

Leaf morphology• Leaf types

•Gymnosperm•Needle-like•Prickly to touch•Juniperus spp.(adult foliage)

Leaf morphology(Gymnosperm leaf types)

Leaf morphology• Leaf types

•Gymnosperm•Scale-like•Overlaps like shingles or fish scales

•Soft to touch•Cupressus spp., Thuja spp., Juniperus spp. (juvenile foliage)

Leaf morphology(Gymnosperm leaf types)

Leaf morphology• Leaf types

•Gymnosperm•Needle-like•Pinus spp.

•Combined in fascicles of 1, 2, 3, 4, or 5 needles

Leaf morphology(Gymnosperm leaf types)

Leaf morphology• Leaf types

•Gymnosperm•Abies spp., Cedrus spp., Picea spp., Taxus spp.•Singly or in clusters on stem

Leaf morphologyLeaf morphology(Gymnosperm leaf types)(Gymnosperm leaf types)

Spruce Foliage

Leaf morphology• Leaf shapes

•Angiosperm•Ovate

Leaf morphology• Leaf shapes

•Angiosperm•Obovate

Leaf morphology• Leaf shapes

•Angiosperm•Cordate

Leaf morphology• Leaf shapes

•Angiosperm•Lanceolate

Leaf morphology• Leaf shapes

•Angiosperm•Linear

Leaf morphology• Leaf shapes

•Angiosperm•Deltoid

Leaf morphology• Leaf margins

•Angiosperm•Entire

Leaf morphology• Leaf margins

•Angiosperm•Serrate

Leaf morphology• Leaf margins

•Angiosperm•Sinuate

Leaf morphology• Leaf margins

•Angiosperm•Lobed

Leaf morphology• Leaf margins

•Angiosperm•Crenate

The End