1	"Leaves decussate"	2
1	"Leaves in spirals"	3
2	"Leaflets with conspicuous lateral veins; capsule c. 2 cm diam., finely hairy"	"Dysoxylum oppositifolium"
2	"Leaflets with scarcely discernible lateral veins; capsule 5–8 cm diam., glabrous"	"Dysoxylum acutangulum"
3	"Leaves in bud stiletto-like"	4
3	"Leaves in bud fist-shaped"	5
4	"Leaves 3- or 4-jugate; capsule c. 5 cm long, pyriform, usually strongly veined when dried, lacking rostrum"	"Dysoxylum latifolium"
4	"Leaves usually 2-jugate; capsule c. 3.5–4 cm long, subspherical, ±veined when dried, distinctly rostrate"	"Dysoxylum pumilum"
5	"Leaves paripinnate, sometimes with a terminal spike"	6
5	"Leaves imparipinnate"	9
6	"Domatia present"	"Dysoxylum fraserianum"
6	"Domatia absent"	7
7	"Petals less than 2 mm long"	"Dysoxylum papuanum"
7	"Petals more than 5 mm long"	8
8	"Bracts and bracteoles 1–1.5 mm long; petals 6–15 mm long; capsule to 2.5 cm diam.; foliage not garlic- scented"	"Dysoxylum klanderi"
8	"Bracts and bracteoles minute; petals 5–8 mm long; capsule to 7.7 cm diam.; foliage garlic-scented"	"Dysoxylum alliaceum"
9	"Calyx of free sepals"	10
9	"Calyx cupular to tubular"	11
10	"Calyx glabrous or subglabrous"	"Dysoxylum gaudichaudianum"
10	"Calyx densely hairy"	"Dysoxylum rufum"
11	"Fruit densely hairy"	"Dysoxylum setosum"
11	"Fruit glabrous"	12
12	"Flowers on bole and branches, rarely in axils too"	13
12	"Flowers in axils"	14
13	"Petals 15–20 mm long"	"Dysoxylum parasiticum"
13	"Petals 8–9 mm long"	"Dysoxylum pettigrewianum"
14	"Flowers 4-merous"	"Dysoxylum mollissimum"
14	"Flowers 5-merous"	"Dysoxylum arborescens"