Key B - Tree Families and Genera

1	Leaves reduced to whorls of minute scales on thin, needle-like jointed and grooved branchlets; fruits are enclosed in hard cones with pointed valves	*She-oaks (Casaurina*, Allocasaurina) She-oak Family (Casaurinaceae**)¹
1	Leaves or fruits not as above	2
1	Flowers with petals	3
2	Flowers without petals or petal-like segments	2
3	Small trees or large shrubs of coastal tidal mudflats with 4-lobed white flowers turning golden with age	*Mangroves (Avicennia*) Verbena Family (Verbenaceae**)
3	Inland or coastal plants but not growing in tidal mudflats; flowers not as above	4
4	Petals 5, separated at the base, rather stiff and almost circular, white, pink or reddish	*Tea-trees (Leptospermum*) Myrtle family (Myrtaceae**)
4	Petals not as above	5
5	Petals small, greenish and tubular; leaves bright green and shiny	*Mirror Bush (Coprosma*) Coprosma Family (Rubiaceae**)
5	Petals white; leaves dull or greyish-green	6
6	Flower with 5 narrow free petals (separated at the base), cream to white	*Bursarias (Bursaria*) Pittosporum Family (Pittosporaceae**)
6	Tubular flower with 5 fused petals, white with purple spots in the throat of the tube	*Boobiallas (Myoporum*) Boobialla Family (Myoporaceae**)
7	Flowers inconspicuous, in dense silky catkins (drooping racemes); bark dark grey and deeply fissured; leaves long and narrow, often with slightly toothed margins	*Willows (Salix*) Willow family (Salicaceae**)
7	Flowers (or at least stamens) conspicuous, not in catkins; bark and leaves various	8
8	Bark shed in thin sheet-like layers; leaves small and often pointed, closely and regularly attached to the stems; flowers in globular or cylindrical heads, white, yellowish, pink, red or mauve; fruit are small capsules or nuts, usually closely clustered together on old wood	*Paperbarks (Melaleuca*) Myrtle Family (Myrtaceae**)^b
8	Plants not entirely as above	9
9	Flowers in a bottlebrush-like head; fruits enclosed in small horizontal splits around woody cones	*Banksias (Banksia*) Protea Family (Proteaceae**)
9	Flowers and fruits not as above	10
10	Mature leaves (actually flattened stems or phyllodes) have longitudinal veining (some species have young leaves made up of numerous small, regularly arranged leaflets); flowers cream to bright yellow in globular clusters or rods (spikes); fruit are long pods containing individually separated seeds	*Wattles (Acacia*) Wattle Family (Mimosaceae**)
10	Mature leaves have a branching vein network; flowers yellow, cream, white, red or pink; fruit are nuts with apical valves which open when seed is ripe (gum-nuts)	*Gums and Boxes (Eucalyptus*) Myrtle family (Myrtaceae**)

^aThe two genera in Casaurinaceae; Casaurina and Allocasuarina differ largely in characters of their cones and fruits.
^bSee Key to Melaleuca species for further detail.

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