Tropicos | Name - !!Medicago L.

!!Medicago L.

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1	Fruit echinulate	(2)
+	Fruit not echinulate	(5)

2 (1)	The spines of the fruit oriented almost at right angles to the surface of the disc	(3)
+	The spines of the fruit oriented almost parallel to the surface of the disc	Medicago polymorpha

3 (2)	Leaflets cuneate, usually pubescent on the lower surface only, spines of the fruit inserted very near the dorsal suture	(4)
+	Leaflets obovate, rarely oblanceolate, pubescent on both surfaces, spines of the fruit not inserted very near the dorsal suture	Medicago minima

4 (3)	Fruit spherical or ovoid with 5-7 coils, individual fruits sometimes with fewer coils; peduncle longer than the petiole
+	Fruit cylindrical, with 2½-4½ coils; peduncle shorter than the petiole

5 (1)	Fruit forming more than 1 spiral	(6)
+	Fruit not forming more than 1 spiral	(7)

6 (5)	Fruit 2 mm or less broad, glabrous to pubescent	Medicago sativa
+	Fruit 4-5 mm broad, glabrous	Medicago orbicularis

7 (5)	Fruit 8-11 mm long, curved	(8)
+	Fruit 3 mm or less long	Medicago lupulina

8 (7)	Curvature of the fruit making a semicircle	Medicago falcata
+	Curvature of the fruit more pronounced than a semicircle	Medicago × varia