1	"Leaf blades linear to linear-spathulate"	"Hildebrantia linearifolia"
1	"Leaf blades obcordate, obovate, oblanceolate or spathulate"	2
2	"Flowers 5-merous"	3
2	"Flowers 4-merous"	4
3	"Leaves sericeous with white appressed hairs; outer segments of fruiting calyces densely pubescent"	"Hildebrandtia sericea"
3	"Leaves glabrous to pubescent, pale green to green; outer segments of fruiting calyces glabrous"	"Hildebrandtia somalensis"
4	"All 4 sepals enlarged in fruit, the inner 2 smaller (about 3 mm long, 2 mm wide) than the outer; styles included in staminate flowers"	"Hildebrandtia sepalosa"
4	"Only 2 sepals enlarged in fruit, the inner 2 remaining minute (about 1 mm long and wide); styles exserted in staminate flowers"	5
5	"Leaf blades broadly obcordate to ibovate, retuse-tipped, lateral veins distinct; inner sepals in staminate flowers broadly elliptic to oblanceolate"	"Hildebrandtia obcordata"
5	"Leaf blades oblanceolate, elliptic, or narrowly obovate, with rounded to acute or emarginate tips, lateral veins indistinct; inner sepals of staminate flowers ovate to triangular"	6
6	"Leaf blades glabrous or almost so, oblanceolate"	"Hildebrandtia diredawaensis"
6	"Leaf blades silvery pubescent to villous, elliptic to narrowly obovate"	"Hildebrandtia africana"