1	"Stamens 30 or more"	2
1	"Stamens 4-12"	12
2	"Capsule dehiscing septicidally; valves simple"	"Gunniopsis divisa"
2	"Capsule dehiscing septicidally and also partly loculicidally; valves bifid"	3
3	"Leaves terete, or flattened only near base"	4
3	"Leaves flat"	5
4	"Leaves and stems densely pubescent"	"Gunniopsis quadrifida"
4	"Leaves and stems glabrous"	"Gunniopsis tenuifolia"
5	"Leaves lanceolate; stems and leaves covered with peltate scales"	"Gunniopsis calcarea"
5	"Leaves spathulate, ovate or linear; if stems and leaves pubescent, trichomes not peltate scales"	6
6	"Plant with well-developed fleshy taproot; stems rarely branched; flowers solitary, terminal"	"Gunniopsis glabra"
6	"Plant without fleshy taproot, stems much-branched; flowers in cymes"	7
7	"Perennial, densely pubescent"	"Gunniopsis zygophylloides"
7	"Ephemeral, glabrous"	8
8	"Papillae sparse on leaves and branchlets or absent"	9
8	"Papillae many on leaves and branchlets, sometimes lacking on lower branchlets"	11
9	"Perianth yellow inside"	"Gunniopsis intermedia"
9	"Perianth white inside"	10
10	"Seeds club-shaped, dark brown or black; WA species"	"Gunniopsis rodwayi"
10	"Seeds oblong, light brown; S.A. species"	"Gunniopsis calva"
11	"Perianth yellow or white inside"	"Gunniopsis papillata"
11	"Perianth pink inside"	"Gunniopsis kochii"
12	"Leaves linear, perianth lobes white or pink inside"	"Gunniopsis propinqua"
12	"Leaves oblong; perianth lobes green inside"	13
13	"Valves of capsule bifid; seeds white, brown on radicular edge"	"Gunniopsis septifraga"
13	"Valves of capsule simple; seeds light brown"	"Gunniopsis rubra"