1	"Scape 8 or more times as long as spike; flowering spike broad and brush-like from the very long erect filaments; stomates in linear, subsurface, hair-lined chambers"	"Xanthorrhoea gracilis"
1	"Scape 5 or less times as long as spike; flowering spike ±cylindrical, the filaments short and erect or, if longer, recurved; stomates at leaf surface or if sunken, then each in a pit"	2
2	"Spike longer than scape"	3
2	"Spike shorter than or equal to scape"	7
3	"Packing-bracts subulate, glabrous"	"Xanthorrhoea acanthostachya"
3	"Packing-bracts shortly acute to triangular, glabrous to hirsute or fringed with hairs"	4
4	"Cluster-bracts prominent for at least part of spike"	"Xanthorrhoea thorntonii"
4	"Cluster-bracts obscure or almost so"	5
5	"Leaves 4–8 mm wide"	"Xanthorrhoea platyphylla"
5	"Leaves usually less than 4 mm wide"	6
6	"Leaves grey-green, glaucous; bracts dark brown, hirsute"	"Xanthorrhoea drummondii"
6	"Leaves green, not glaucous; bracts green or dark brown, glabrous to moderately hirsute"	"Xanthorrhoea preissii"
7	"Packing-bracts narrowly triangular to subulate"	"Xanthorrhoea acanthostachya"
7	"Packing-bracts obtuse to triangular"	8
8	"Scape and spike together usually less than 90 cm long"	9
8	"Scape and spike together usually 90 cm or more long"	10
9	"Scape and spike distinctly curved; spike often at ±90° to scape"	"Xanthorrhoea nana"
9	"Scape emerging from crown ±vertically; spike and scape ±straight"	"Xanthorrhoea brunonis"
10	"Leaves blue-green"	"Xanthorrhoea brevistyla"
10	"Leaves green"	"Xanthorrhoea brunonis"