1	"Filaments all hairy or 3 hairy, 3 glabrous"	2
1	"Filaments all glabrous, or scabrous, puberulous or papillulose"	5
2	"Flowers 2 or more per node"	"Arthropodium milleflorum"
2	"Flower 1 per node"	3
3	"Anthers recurved after shedding pollen"	"Arthropodium minus"
3	"Anthers remaining straight"	4
4	"Flowers secund, nodding"	"Arthropodium curvipes"
4	"Flowers not secund, erect or spreading"	"Arthropodium dyeri"
5	"Anthers with 4 appendages"	"Dichopogon tyleri"
5	"Anthers with 2 appendages"	6
6	"Pedicels spreading or erect in flower"	7
6	"Pedicels nodding in flower"	8
7	"Pedicels erect in flower and fruit, 1 per node"	"Arthropodium strictum"
7	"Pedicels spreading in flower, nodding in fruit, 2–6 per node"	"Arthropodium fimbriatum"
8	"Pedicels 2–6 per node, not secund"	"Dichopogon capillipes"
8	"Pedicels 1 per node, secund"	"Dichopogon preissii"