1	"Leaves either 3-veined from near base or less than 30 mm long."	2
1	"Leaves not 3-veined from near base and lamina more than 30 mm long."	5
2	"Leaves hairy on lower surface, especially along the veins."	"Cryptocarya triplinervis"
2	"Leaves more or less glabrous on lower surface."	3
3	"Leaves mostly less than 30 mm long."	"Cryptocarya williwilliana"
3	"Leaves more than 30 mm long."	4
4	"Leaves with 1 or 2 (occasionally more) prominent domatia, as swellings on the upper surface and deep cavities on the lower surface."	"Cryptocarya foveolata"
4	"Either domatia absent, or domatia not swollen as above."	"Cryptocarya laevigata"
5	"Mature leaves green on both surfaces, younger leaves sometimes glaucous."	6
5	"Mature leaves glaucous on lower surface."	10
6	"Leaves with reticulum usually invisible on both surfaces or if reticulum faint then not areolate; the surfaces contrasting in colour (particularly in fresh material), lower surface paler but neither glaucous nor yellowish."	"Cryptocarya meisneriana"
6	"Leaves with reticulum distinct on both surfaces and finely areolate; either the surfaces similar in colour or the lower surface yellowish or glaucous."	7
7	"Leaves mostly more than 4 cm wide, length to breadth ratio less than 2.5:1; secondary veins 4 or 5 pairs."	"Cryptocarya foetida"
7	"Leaves mostly less than 4 cm wide, length to breadth ratio of more than 2.5:1; secondary veins 4–12 pairs."	8
8	"Leaves broadest below the middle, margins not undulate."	"Cryptocarya floydii"
8	"Leaves broadest at or above the middle, margins undulate."	9
9	"Midrib more or less flattened, scarcely raised below except towards petiole, flush with the upper surface, yellowish; secondary veins more or less straight, tending to dichotomize about a third of the way in from the margin."	"Cryptocarya bidwillii"
9	"Midrib raised and rounded below, slightly raised above, whitish in fresh leaves; secondary veins curving unbranched towards the margin."	"Cryptocarya microneura"
10	"Mature leaves distinctly hairy on lower surface, especially along the veins."	11
10	"Mature leaves more or less glabrous on lower surface."	13
11	"Leaves broadest above the middle, the apex usually rounded, in juvenile leaves the apex pointed and the leaves usually more than 13 cm long."	"Cryptocarya obovata"
11	"Leaves broadest at or below the middle, the apex acute or obtuse, not rounded, the lamina usually less than 13 cm long."	12
12	"Leaves with more than 7 pairs of secondary veins, the veins making angles of 70–800 with the midvein; leaves usually less than 8 cm long."	"Cryptocarya dorrigoensis"
12	"Leaves with 4–6 pairs of secondary veins, the lowest pairs making angles of c. 450 with the midvein; leaves mostly more than 8 cm long."	"Cryptocarya rigida"
13	"Leaves with lamina usually more than 7 cm long, reticulum distinct."	14
13	"Leaves with lamina mostly less than 7 cm long, reticulum obscure or distinct."	15
14	"Leaves evenly whitish on lower surface, strongly contrasting with the secondary veins, which are brown or green when fresh (reddish brown when dry); reticulum coarse, not areolate; petiole glabrous; fruit ovoid, not ribbed."	"Cryptocarya erythroxylon"
14	"Leaves dull ashy-green on lower surface, usually more or less blotched, only moderately contrasting with the greenish secondary veins; reticulum very finely areolate; petiole minutely hairy; fruit depressed-globose, ribbed."	"Cryptocarya glaucescens"
15	"Leaves with reticulum obscure."	"Cryptocarya meisneriana"
15	"Leaves with reticulum distinct in dried leaves and in fresh leaves in transmitted light, finely areolate"	"Cryptocarya nova-anglica"