1	"Calyces 4-5-ribbed; plants succulent"	"Striga gesnerioides"
1	"Calyces 10- or more ribed; plants not succulent"	2
2	"Leaves up to 3 mm wide, with obscure veins and entire margins; calyces 10-ribbed; corollas red and/or yellow"	"Striga asiatica"
2	"Leaves 4-12 mm wide, with 2-5 prominent veins and toothed margins; calyces 10-15 ribbed; corollas salmon pink"	3
3	"Hairs on stems stiff; lower bracts distinctly 3-veined, toothed; corolla lobes of lower lips 6-9 mm long"	"Striga forbesii"
3	"Hairs on stems soft; lower bracts obscurely veined; corolla lobes of lower lips 10-25 mm long"	"Striga latericea"