1	"Leaves thick and succulent"	2
1	"Leaves not thick and succulent"	4
2	"Leaf margins toothed"	Aloe
2	"Leaf margins not toothed"	3
3	"Flowers pendulous, upward-curved"	Gasteria
3	"Flowers erect, straight or downward-curved"	Haworthia
4	"Individual flower stalks articulated"	5
4	"Individual flower stalks not articulated"	6
5	"Flowers radially symmetrical; stamens 6, equal"	Asphodelus
5	"Flowers bilaterally symmetrical; stamens 3+3, unequal"	Asphodeline
6	"Flowers long-tubular, pendulous; tepals fused"	Kniphofia
6	"Flowers not as above"	7
7	"Anther filaments hairy"	Bulbine
7	"Anther filaments smooth"	8
8	"Stamens longer than the tepals; anthers attached at the base"	Eremurus
8	"Stamens equal to or shorter than tepals; anthers attached in the middle"	Bulbinella