1	"Flowers with 6 or 7 fertile anthers of differing sizes, sometimes beaked; pods cylindric"	2
1	"Flowers with 10 fertile anthers, subequal, truncate; pods compressed"	3
2	"Fertile stamens 6; gland at base of petiole, flat"	"Senna barclayana"
2	"Fertile stamens 7; glands between lowest 2–4 pairs of leaflets, erect"	"Senna multiglandulosa"
3	"Petals usually more than 10 mm long; stipules 4–6 mm long, linear to subulate, somewhat persistent; seeds glossy; leaflets in 5–12 pairs"	"Senna aciphylla"
3	"Petals less than 11 mm long; stipules minute, triangular, early caducous; seeds dull; leaflets in 1–8 pairs"	"Senna artemisioides"