1	"Flowers pink, purple, blue or red"	2
1	"Flowers yellow, orange, orange-red or red-brown"	14
2	"Leaves simple (WA—Walkaway to Cape Arid)"	"Gompholobium confertum"
2	"Leaves compound"	3
3	"Leaflets >1.5 mm wide"	"Gompholobium knightianum"
3	"Leaflets 0.2–1.5 mm wide"	4
4	"Flowers lateral along branchlets"	5
4	"Flowers at apex of branchlets"	8
5	"Calyx hairy"	6
5	"Calyx glabrous"	7
6	"Style bearded; leaflets (4.5–)6.5–8.5(–12) mm long, slightly recurved"	"Gompholobium villosum"
6	"Style glabrous; leaflets (4.5–)7–15(–23) mm long, straight"	"Gompholobium glabristylum"
7	"Keel dark pink to red, shorter than or as long as wings; standard mauve to purple with an inconspicuous dull yellow or greenish centre"	"Gompholobium scabrum"
7	"Keel deep purple-red, markedly longer than wings; standard pink-orange to bright orange-red with a conspicuous yellow centre"	"Gompholobium hendersonii"
8	"Buds ecostate"	9
8	"Buds costate at least at base of lobe"	12
9	"Standard blue"	"Gompholobium cyaninum"
9	"Standard pink, purple or red"	10
10	"Leaflets 3–5"	"Gompholobium cinereum"
10	"Leaflets 12–22"	11
11	"Leaflets smooth with pungent point; flowers pale pink"	"Gompholobium pungens"
11	"Leaflets tuberculate with an innocuous mucro; flowers deep purplish-pink"	"Gompholobium venustum"
12	"Standard mauve to magenta pink, <12.5 mm wide"	"Gompholobium shuttleworthii"
12	"Standard pale pink, >12.5 mm wide"	13
13	"Outer surface calyx hairs 0.8–1.5 mm long, adaxial calyx lobes 8.5–10 mm long"	"Gompholobium muticum"
13	"Outer surface calyx hairs 0.3–0.7 mm long, adaxial calyx lobes 6–7 mm long"	"Gompholobium roseum"
14	"Plants twining"	"Gompholobium polymorphum"
14	"Plants not twining"	15
15	"Flowers orange, orange-red or red-brown on front of standard"	16
15	"Flowers yellow to yellow-orange on front of standard"	23
16	"Leaves simple"	17
16	"Leaves compound"	18
17	"Leaves broadly linear, sessile, 4-6 mm long"	"Gompholobium simplicifolium"
17	"Leaves narrowly to broadly ovate or orbicular, 13-43 mm long"	"Gompholobium ovatum"
18	"Leaves digitately trifoliolate"	"Gompholobium hendersonii"
18	"Leaves imparipinnate with 5–37 leaflets"	19
19	"Leaflets hairy"	20
19	"Leaflets glabrous"	22
20	"Ovary glabrous"	"Gompholobium preissii"
20	"Ovary densely hairy"	21
21	"Leaves mostly with > 10 pairs of overlapping leaflets; leaflets mostly < 4 mm long; hairs on peduncles, pedicels and buds > 1 mm long"	"Gompholobium polyzygum"
21	"Leaves mostly with 5–10 pairs of slightly or non overlapping leaflets; leaflets mostly > 4 mm long; hairs on peduncles, pedicels and buds c. 0.8 mm long"	"Gompholobium oreophilum"
22	"Leaves imparipinnate with 5-11 leaflets; leaflets 9-35 mm long, 0.2-2.5 mm wide"	"Gompholobium subulatum"
22	"Leaves imparipinnate with 13-23 leaflets; leaflets 4-8 mm long, 2-5 mm wide"	"Gompholobium karijini"
23	"Plants viscid"	24
23	"Plants not viscid"	29
24	"Leaflets flat, with or without slightly recurved margins"	25
24	"Leaflets with strongly recurved to revolute margins"	27
25	"Leaflet apex mostly retuse, rarely rounded"	"Gompholobium obcordatum"
25	"Leaflet apex acute or obtuse"	26
26	"Standard lamina <8 mm wide"	"Gompholobium gompholobioides"
26	"Standard lamina >14 mm wide"	"Gompholobium burtonioides"
27	"Leaflet apex prominently recurved with a 0.25–0.4 mm mucro"	"Gompholobium baxteri"
27	"Leaflet apex straight or slightly recurved with a 0.05–0.2 mm mucro"	28
28	"Buds glabrous"	"Gompholobium viscidulum"
28	"Buds with sparse, spreading, wavy hairs ~0.4 mm long"	"Gompholobium glutinosum"
29	"Leaves simple, broad-linear, sessile, 4-6 mm long"	"Gompholobium simplicifolium"
29	"Leaves compound"	30
30	"Subtending leaves longer than inflorescence"	"Gompholobium capitatum"
30	"Subtending leaves not longer than inflorescence"	31
31	"Apex of majority of leaflets on plant abruptly and broadly flared at apex"	"Gompholobium gairdnerium"
31	"Apex of leaflets acute or obtuse but not broadly flared"	32
32	"Buds costate (ribbed at lobe margins)"	33
32	"Buds ecostate"	35
33	"Plants glabrous or very sparsely hairy, with calyces glabrous except for lobe margins"	"Gompholobium karijini"
33	"Plants ± densely hairy, especially on branchlets and calyces"	34
34	"Leaves mostly with > 10 pairs of overlapping leaflets; leaflets mostly < 4 mm long; hairs on peduncles, pedicels and buds > 1 mm long"	"Gompholobium polyzygum"
34	"Leaves mostly with 5–10 pairs of slightly or non overlapping leaflets; leaflets mostly > 4 mm long; hairs on peduncles, pedicels and buds c. 0.8 mm long"	"Gompholobium oreophilum"
35	"Petioles 0.2–0.6 mm long"	36
35	"Petioles 0.6–4 mm long"	38
36	"Indumentum of straight hairs, pedicels <3.5 mm long"	"Gompholobium aristatum"
36	"Indumentum curly, pedicels >3.5 mm long"	37
37	"Leaflets stout, 0.8–1.1 mm wide"	"Gompholobium wonganense"
37	"Leaflets slender, 0.4–0.6 mm wide"	"Gompholobium laxum"
38	"Leaves digitately trifoliolate"	"Gompholobium marginatum"
38	"Leaves imparipinnate with 3–37 leaflets"	39
39	"Ovules 2"	"Gompholobium subulatum"
39	"Ovules 8–20"	"Gompholobium tomentosum"