1	"Petioles laterally compressed, 2–8 mm wide; mature leaves often lacking leaflets"	"Senna artemisioides subsp. petiolaris"
1	"Petioles more or less terete, less than 2 mm wide; mature leaves usually with leaflets"	2
2	"Leaflets truly terete, less than 2 mm wide"	3
2	"Leaflets flat, 2 mm or more wide, margins sometimes inrolled giving a terete appearance"	4
3	"Petioles more than 15 mm long; leaflets in 1–4 pairs, glabrous to sparsely hairy"	"Senna artemisioides subsp. filifolia"
3	"Petioles less than 15 mm long; leaflets in 2–8 pairs, sparsely to densely hairy"	"Senna artemisioides subsp. artemisioides"
4	"Leaflets mostly in 1–2 pairs, linear to narrowly elliptic, mostly more than 5 times longer than wide"	"Senna artemisioides subsp. zygophylla"
4	"Leaflets in 1–6 pairs, linear, elliptic, oblong or obovate, mostly less than 5 times longer than wide"	"Senna artemisioides subsp. coriacea"