Week 4 Keyed Trees
Identification Key
Tree one: Eucalyptus
Key to Groups: 1' (Leaves usually <8 in long, not sword-shaped; leaves simple or compound; leaf veins parallel/netted)
2' (Tree is a confier or broad-leaved tree, not a palm; leaves arise from branches)(
3' (Leaf blades broad and flattened -mostly angiosperm)
5' (Leaves simple (with undivided blades, deeply lobed leaves are still simple)
8' (Leaves attached alternately (1 per node))
9' (Leaf tip pointed or rounded, not notched or truncate)
13 (leaves margin smooth (without teeth or lobes), wavy or not) - Group 8
Group: 8 - 1' (Flower clusters not resembling bottle brushes; trees w/o clusters of sessile, woody fruits along stems)
3' (Leaves not phyllodes; tree without the combo of characters described abo
4' (Most leaves 3/4 in. wide or greater)
16' (Tree without milky white sap)
18' (Leaves unscented or smelling medicinal or spicy when crushed; bark varying)
19 (Leaves with translucent dots when held into light)
20 (Petals fused into a bud cap; fruity a woody capsule - Eucalypts, also called Gum Trees)
Species: Eucalyptus ssp (Gum Trees)
Tree two: Silk Oak
Key to Groups: 1' (Leaves usually <8 in long, not sword-shaped; leaves simple or compound; leaf veins parallel/netted)
2' (Tree is a confier or broad-leaved tree, not a palm; leaves arise from branches)(
3' (Leaf blades broad and flattened -mostly angiosperm)
5 (Leaves compound (divided into leaflets)
6' (Leaves pinnately or bipinnately compound)
7' (Leaves attached alternately (1 per node)) - Group 6
Group: 6 - 1' (Leaflets 5 for more)
3 (Leaves bipinnately compound (twice divided))
4' (Tree lacking thorns or spins)
6' (Leaves without glands on upper surface; flowers varying)
7' (Leaflet margin conspicuously serrate, irregular toothed, or lobed)
9 (Leafelet undersides harry and silver)
Species: Grevillea robusta (Silk Oak)
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