1	"Corolla lobes about twice as long as the tube; flowers usually glandular"	"Cotyledon cuneata"
1	"Corolla half as long as the tube; flowers rarely glandular or if so then tube longer that 15 mm"	2
2	"Corolla tube abruptly swollen between the calyx lobes"	"Cotyledon C. tomentosa var. ladismithiensis"
2	"Corolla tube cylindrical or gradually inflated"	3
3	"Leaves tomentose with non-glandular hairs"	"Cotyledon C. tomentosa var. ladismithiensis"
3	"Leaves hairless or if tomentose then with glandular hairs"	4
4	"Corolla tube (8)10–14(–16) mm long"	"Cotyledon C. orbiculata var. orbiculata"
4	"Corolla tube 20–25 mm long"	"Cotyledon C. orbiculata var. oblonga"