1	"All leaves simple"	2
1	"Leaves with 3(-6) leaflets or, rarely, with 1 leaflet that is jointed at the top of the petiole"	3
2	"Leaves up to 8 mm long and 3 mm wide; keel up to 10 mm long; pod 8-12 mm long, 5-7 mm wide"	"Crotalaria aegyptiaca"
2	"Leaves much larger; keel 13 -15 mm long; pod 30-50 mm long, 10-18 mm wide"	"Crotalaria retusa"
3	"Beak of the keel spirally twisted through 180° or more"	4
3	"Beak of the keel not twisted or only slightly so"	12
4	"Inflorescence- axes spine-tipped"	"Crotalaria horrida"
4	"Inflorescence axes not spin-tipped"	5
5	"Flowers all in axillary clusters; pods 20-26 mm wide"	"Crotalaria scassellatii"
5	"Flowers in racemes; pods to 14 mm wide"	6
6	"Keel 4-5 mm long"	"Crotalaria leptocarpa"
6	"Keel much longer"	7
7	"Upper calyx lobes obliquely oblong-triangular and more or less abruptly contracted to an excentricate apiculate tip"	"Crotalaria laburnoides"
7	"Upper calyx lobes triangular"	8
8	"Wings longer than the keel"	9
8	"Wings shorter than the keel"	10
9	"Keels about 16 mm long; stems, leaves, and pods with closely appressed hairs"	"Crotlia mudugensis"
9	"Keel 6-8 mm long; stems, leaves, and pods with more or less spreading hairs"	"Crotalaria deflersii"
10	"Pod ovoid, 8-10 long"	"Crotalaria oligosperma"
10	"Pod oblong-clavate,15-25 mm long"	11
11	"Leaflets membranous with visible nervation; epidermis not readily peeling; stipules usually present"	"Crotalaria emarginella"
11	"Leaflets semisucculent with obscure nervation; epidermis, except shoots, peeling to reveal greyish to purplish bark; stipules absent"	"Crotalaria incrassifolia"
12	"Calyx becoming basally truncate and deflexed against the pedicel; standard and keel more or less purple"	"Crotalaria albicaulis"
12	"Calyx not as above; standard and keel variously colored"	13
13	"Stipules and bracts cordate"	"Crotalaria ballyi"
13	"Stipules and bracts not cordate"	14
14	"Calyx 0.8-1.2 times as long as the keel"	15
14	"Calyx not or little more than half as long as the keel"	23
15	"Calyx 4-lobed; flowers solitary"	"Crotalaria pteropoda"
15	"Calyx 5-lobed; flowers usually 2 or more in racemes"	16
16	"Keel angular in the lower half"	17
16	"Keel rounded about the middle"	19
17	"Leaflets elliptic-obovate to subcircular, drying blackish; bracteoles linear, less than 0.5 mm wide"	"Crotalaria incana"
17	"Leaflets linear-lanceolate to elliptic, not drying blackish; bracteoles more or less lanceolate, more than 0.5 mm wide"	18
18	"Pods rather densely spreading hirsute; racemes 6-20 flowered"	"Crotalaria rufocaulis"
18	"Pods rather thinly hairy; racemes 2-6-flowered"	"Crotalaria barkae"
19	"Standard 10-15 mm long; calyx 8-10 mm long"	20
19	"Standard and calyx 3-6 mm long"	21
20	"Stems, leaves, and pods with closely appressed hairs; stipules absent"	"Crotalaria comptosepala"
20	"Stems leaves and podes with somewhat spreading hairs; stipules present but often falling early"	"Crotalaria deflersii"
21	"Plants densely branched shrublets; pods 2-4 seeded"	"Crotalaria persica"
21	"Plants small herbs; pods 8-24 seeded"	22
22	"Standard glabrous on the back except over the midvein; keel usually glabrous, with a twisted beak"	"Crotalaria leptocarpa"
22	"Standard pubescent all over the back; keel densely pubescent, with an untwisted beak"	"Crotalaria linearifoliolata"
23	"Keels 2-3 cm long, with an upwardly directed beak; stipe of pod more than 1.5 cm long"	"Crotalaria laburnifolia"
23	"Keels shorter or with a forwardly directed beak; stipe of pod shorter"	24
24	"Pods and ovaries with long hairs inside, at least along the sutures"	25
24	"Pods and ovaries glabrous or with scattered short hairs inside"	28
25	"Keels 13-17 mm long"	26
25	"Keels 6-12 mm long"	27
26	"Bracteoles persistent; pods about 1.6 cm long"	"Crotalaria leucoclada"
26	"Bracteoles falling early; pods 3-3.8 cm long"	"Crotalaria rhynchocarpa"
27	"Pods densely packed with long hairs inside, not divided into 2 cells"	"Crotalaria saltiana"
27	"Pods with long hairs only along the sutures inside, not divided into two cells"	"Crotalaria warfae"
28	"Keels 15-23 mm long; podes 35-50 mm long"	"Crotalaria comanestiana"
28	"Keels up to 15 mm long; pods smaller"	29
29	"Leaves with 4-6 leaflets"	"Crotalaria pleiophylla"
29	"Leaves with (1-)3 leaflets"	30
30	"Stipules absent"	31
30	"Stipules present, sometimes small"	33
31	"Leaves linear, up to 3 mm wide; pod 5-8 mm long"	"Crotalaria intricata"
31	"Leaves oblanceolate to obovate, wider; podss 12-24 mm long"	32
32	"Bracts more falling before the flowers open; keels (9-)11-12 mm long"	"Crotalaria somalensis"
32	"Bracts persistent; keels 8-9 mm long"	"Crotalaria jubae"
33	"Racemes sussessile, dense; branches conspicuously ribbed"	"Crotalaria pycnostachya"
33	"Racemes pedunculate, more or less open; branches not conspicuously ribbed"	34
34	"Keels angular; styles geniculate, constricted at the bend; bracteoles present on the lower part of the pedicels"	35
34	"Keels rounded or, if subangular, style not geniculate; bracteoles on the calyx or just below"	37
35	"Leaves mostly with 1-leaflet, occasional leaves with 3 leaflets; calyces 6.5-8 mm long; keels 10-15 mm long"	"Crotalaria allophyla"
35	"Leaves mostly with 3 leaflets, occasional leaves with 1 leaflet; calyces 3-5 mm long; keels 6-10 mm long"	36
36	"Racemes with 1-2(-3) flowers; pods 12-15 mm long; calyces puberulous"	"Crotalaria microphylla"
36	"Racemes with 4-12 flowers; pods about 9 mm long; calyces subglabrous"	"Crotalaria boranica"
37	"Pods terminating in a long beak; leaves deciduous; hairs slightly 2-branched, attached to the surface near but not at the base"	"Crotalaria persica"
37	"Pods not as above; leaves persistent; hairs attached to the surface at their base"	38
38	"Pods 12 mm or more long"	39
38	"Pods less than 10 mm long"	41
39	"Leaves densely pilose on both surfaces"	"Crotalaria benadirensis"
39	"Leaves glabrous on the upper surface"	40
40	"Bracteoles more or less ovate; racemes dense; petioles 7-15 cm long"	"Crotalaria bogdaniana"
40	"Bracteoles linear; racemes not dense; petioles 20 mm long or longer"	"Crotalaria phillipsiae"
41	"Plants herbaceous with more or less prostrate stems"	"Crotalaria malindiensis"
41	"Plants woody shrublets, more or less erect"	42
42	"Petioles shorter than 10 mm, much shorter than the leaflets; leaflets oblanceolate to obovate, up to 15 mm long and 10 mm wide"	"Crotalaria dumosa"
42	"Petioles about 15-150 mm long, longer than the leaflets; leaflets more or less linear, up to 30 mm long and 3 mm wide, glabrous on the upper surface"	"Crotalaria intricata"