1	"Dorsal surface of adult leaf rounded"	2
1	"Dorsal surface of adult leaf keeled"	9
2	"Female cones solitary on slender branchlets which are not apically expanded; female cone scales thin and separating almost to base"	3
2	"Female cones solitary or clustered, on short branchlets which expand towards the apex; female cone scales thick, united below and forming a thick cone base"	5
3	"Largest female cones less than 18 mm diam.; tropical species"	"Callitris intratropica"
3	"Largest female cones more than 18 mm diam.; southern species"	4
4	"Foliage grey-green or glaucous; older trees with a spreading habit, not columnar; inland species"	"Callitris glaucophylla"
4	"Foliage dark green; older trees with a columnar, erect habit; coastal species"	"Callitris columellaris"
5	"Female cones less than 20 mm diam."	"Callitris canescens"
5	"Female cones more than 20 mm diam."	6
6	"Female cones 20–25 mm diam.; plants usually multi-stemmed"	7
6	"Female cones usually more than 25 mm diam.; plants usually single-stemmed"	8
7	"Female cones acute or obtuse, finely regularly tuberculate; eastern Australian species"	"Callitris verrucosa"
7	"Female cones rounded, smooth or irregularly tuberculate; Western Australian species"	"Callitris tuberculata"
8	"Female cones densely irregularly and coarsely tuberculate"	"Callitris preissii"
8	"Cones smooth or sparsely tuberculate"	"Callitris gracilis"
9	"Female cone scales with a distinct, broad, conical, dorsal protuberance"	10
9	"Female cone scales with a small, narrow protuberance, or protuberance lacking"	12
10	"Female cones ovoid, distinctly longer than broad"	"Callitris oblonga"
10	"Female cones globular, not longer than broad"	11
11	"Leaves less than 3 mm long, obtusely keeled; eastern Australian species"	"Callitris rhomboidea"
11	"Leaves mostly more than 3 mm long, acutely keeled; western Australian species"	"Callitris roei"
12	"All cone scales equal"	"Callitris macleayana"
12	"Alternate cone scales reduced"	13
13	"Female cones on slender branchlets which are not apically expanded, deciduous soon after maturity"	14
13	"Female cones on stout, apically expanded branchlets, persistent for several years after maturity"	15
14	"Leaves obtusely keeled; columella 1–3 mm high, deeply 3-lobed or 3-partite"	"Callitris endlicheri"
14	"Leaves acutely keeled; columella 3–5 mm high, shallowly apically 3-angled"	"Callitris baileyi"
15	"Female cones ovoid, distinctly longer than broad"	"Callitris oblonga"
15	"Female cones globular, not longer than broad"	16
16	"Female cones less than 20 mm diam.; dorsal leaf surface acutely keeled; Western Australian species"	"Callitris drummondii"
16	"Female cones more than 20 mm diam.; dorsal leaf surface obtusely keeled; eastern Australian species"	17
17	"Adult leaves 2–3 mm long"	"Callitris monticola"
17	"Adult leaves mostly more than 4 mm long"	"Callitris muelleri"