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 macronema"
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 shorter than or equal to scape"	3
2	"Spike longer than scape"	8
3	"Packing-bracts densely hirsute on abaxial surface, appearing velvety"	"Xanthorrhoea fulva"
3	"Packing-bracts glabrous to hirsute or fringed with hairs but not velvety"	4
4	"Scape and spike together usually less than 90 cm long"	"Xanthorrhoea pumilio"
4	"Scape and spike together usually 90 cm or more long"	5
5	"Cluster-bracts usually prominent at least in some part of spike"	"Xanthorrhoea johnsonii"
5	"Cluster-bracts obscure or restricted to junction of scape and spike"	6
6	"Leaves usually more or less quadrate-rhombic to transverse-rhombic in transverse section, less than 3 mm wide"	"Xanthorrhoea johnsonii"
6	"Leaves narrowly transverse-rhombic, depressed-obtrullate, depressed-cuneate to transverse-linear or concave in transverse section, 1.7–10 mm wide"	7
7	"Leaves usually more than 4 mm wide; spike 30–150 cm long"	"Xanthorrhoea latifolia"
7	"Leaves usually less than 4 mm wide; spike usually 5–40 cm long"	"Xanthorrhoea pumilio"
8	"Leaves green, not glaucous"	"Xanthorrhoea johnsonii"
8	"Leaves blue-green or greyish, glaucous"	"Xanthorrhoea glauca"