1	"Scales not present inside the corollas"	"Cuscuta hyalina"
1	"Scales present inside the corollas"	2
2	"Styles 1 or absent"	3
2	"Styles 2"	8
3	"Capsules circumscissile with a definite line of dehiscence"	"Cuscuta reflexa"
3	"Capsules not circumscissile, dehiscing irregularly"	4
4	"Stems and flowers with violet spots; corolla tubes forming sub-globose to urceolate covering around the capsules"	"Cuscuta violacea"
4	"Stems and flowers without violet spots; corolla tubes not forming subglobose to urceolate coverings around the capsules"	5
5	"Stems mostly reddish; steyles more than 1 mm long; capsules 7-9 mm long"	"Cuscuta lupuliformis"
5	"Stems yellow or brown; styles less than 0.4 mm long; capsules 4-6 mm long"	6
6	"Petals 1-1.7 mm long"	"Cuscuta gigantea"
6	"Petals 4-6 mm long"	7
7	"Capsules 6-7 mm in diameter; styles usually less than 0.4 mm long; connate portion of sepals 1.5-2 mm long"	"Cuscuta monogyna"
7	"Capsules 3.3-4 mm in diameter; styles about 2 mm long; connate portion of sepals about 5 mm long"	"Cuscuta lehmanniana"
8	"Sepals, petals, and stamens 4"	9
8	"Sepals and petals usually 5, rarely 4 or 6; stamens 5"	10
9	"Filaments obsolete; petals broadly elliptical, with reticulate pattern, not papillate"	"Cuscuta epithymum"
9	"Filaments long; petals oblong-lanceolate, without a reticulate pattern, papillate"	"Cuscuta capitata"
10	"Stigmas linear"	"Cuscuta europaea"
10	"Stigmas rounded or capitate"	11
11	"Styles subulate; capsules dark brown, thick, seeds not visible through the wall; petals glandular"	"Cuscuta australis"
11	"Styles linear; capsules light brown, membranous, seeds visible through the wall; petals not glandular"	12
12	"Stems coarse; flowers usually in dense glomerules; capsules depressed  at the top"	"Cuscuta pulchella"
12	"Stems very fine; flowers solitary or in umbellate cynes; capsules not depressed at the top"	13
13	"Petals triangular; sepal lobes 2-2.5 mm long, triangular-ovate, keeled near the tips; filaments flat"	"Cuscuta chinensis"
13	"Petalsoblong-elliptical; sepal lobes 1.2-1.5 mm long; oval to orbicular, not keeled near the tips; bracts not keeled; filaments round in cross-section"	"Cuscuta campestris"