1	"Leaves sessile or almost so, more or less hastate and amplexicaul at the base, simple"	"Momordica sessilifolia"
1	"Leaves distinctly petiolate, neither hastate nor amplexicaul at the base, simple or compound"	2
2	"Plants spiny shrubs, the spines replacing or derived from the tendrils and usually paired at the nodes"	3
2	"Plants not spiny, the tendrils solitary at the nodes"	4
3	"Seeds compressed, 12-21 mm long, 10-14 mm wide, 3-4 mm thick; fruits with rows of fleshy spines"	"Momordica spinosa"
3	"Seeds swollen, about 25 mm long, 25-35 mm wide, and 13 mm thick; fruits with undulate, fleshy wings"	"Momordica macrosperma"
4	"Leaves deeply divided into deeply toothed or lobulate segments or leaflets"	"Momordica dissecta"
4	"Leaves, simple, plamately lobed or angled, or compound with clearly distinct, more or less sinuate denticulate leaflets"	5
5	"Leaves simple"	6
5	"Leaves compound"	7
6	"Leaf blades palmately 5-7-lobed to the middle or more; lobes narrowed towards the base; seeds many, compressed, unappendaged; pedicels of male flowers 4-5 mm long, each with a broadly ovate-cordate bract"	"Momordica balsamina"
6	"Leaf blades shallowly 3-5-lobed or angled; lobes broadest at their bases; seeds few, swollen, appendaged; pedicels of males flowers 5-20 mm long, each subtended by linear or lanceolate bract"	"Momordica boivinii"
7	"Leaves succulent, 3-foliolate; male flowers several together, their bracts 13-21 mmm long, 19-32 mm wide"	"Momordica littorea"
7	"Leaves not succulent, 3-15 foliolate; male flowers solitary or, if several together, the bracts much smaller"	8
8	"Plants herbaceous with subterranean tuberous rootstocks; male flowers solitary; pedicels of fruits 2-3 cm long"	"Momordica trifoliolata"
8	"Plants with woody, subaerial tootstocks; male flowers 1-14 together; pedicels of fruits 0.2-1.5 cm long"	"Momordica rostrata"