1	"Plants not succulent; inflorescences spike-like; flowers yellow"	Cartonema
1	"Plants more or less succulent; inflorescences various but not spike-like; flowers white to blue or lilac"	2
2	"Inflorescence enclosed in a spathe, or closely subtended by a spathaceous bract"	3
2	"Inflorescence neither enclosed in a spathe nor subtended by a spathaceous bract"	4
3	"Spathaceous bracts paired; flowers white, actinomorphic; stamens 6, equal; filaments bearded"	Tradescantia
3	"Spathaceous bracts single or clustered but not paired; flowers usually blue, zygomorphic; stamens 3, staminodes 3, filaments all glabrous"	Commelina
4	"Inflorescences very reduced, enclosed in sheaths"	5
4	"Inflorescences usually thyrsiform, not enclosed in sheaths"	7
5	"Flowers actinomorphic; petals fused; stamens 6"	"Cyanotis {Cyanotis axillaris}"
5	"Flowers zygomorphic; petals free; stamens 2 to 3, staminodes 4 to 3"	6
6	"Flowers solitary; stamens 3, borne below the 3 staminodes, filaments glabrous"	Aneilema
6	"Flowers fasciculate; stamens 2, alternating with the 4 staminodes, filaments bearded"	Murdannia
7	"Inflorescence branches and sepals glandular-hairy, stamens 6"	"Floscopa {Floscopa scandens}"
7	"Inflorescence branches and sepals glabrous or eglandular hairy, stamens 2 to 3, staminodes 4 or 3"	8
8	"Stamens alternating with the staminodes, some or all filaments bearded; fruit a 3-chambered capsule"	Murdannia
8	"Stamens attached on one side of the flower, staminodes on the other, all filaments glabrous; fruit a bivalved capsule or indehiscent"	9
9	"Fruit indehiscent, lustrous blue or leaden-coloured; seeds biseriate, embryotega dorsal"	Pollia
9	"Fruit a bivalved capsule, green to brown; seeds uniseriate, embryotega lateral"	Aneilema