1	"At least the lower flowers with stalk below bracteoles more than 5 mm long"	2
1	"All flowers with stalk below bracteoles obsolete or to 5 mm long"	24
2	"Flowers in axillary cymes"	3
2	"Flowers solitary in bract axils or sometimes paired on stalk"	6
3	"Leaves opposite; scrambler or vine; corolla yellow"	"Scaevola enantophylla"
3	"Leaves alternate; shrub, subshrub or small tree; corolla white to blue"	4
4	"Leaves usually 2–9 cm wide"	"Scaevola taccada"
4	"Leaves less than 6 mm wide"	5
5	"Fruit dry, green, grooved"	"Scaevola cunninghamii"
5	"Fruit fleshy, black, smooth"	"Scaevola acacioides"
6	"Bracteoles connate along one margin"	"Scaevola tomentosa"
6	"Bracteoles free from each other"	7
7	"Branchlets on main stem bearing flowers and often spinescent"	"Scaevola spinescens"
7	"Flowers borne on main stem; stems not spinescent"	8
8	"Leaves auriculate, at least the larger ones ±stem-clasping"	9
8	"Leaves not stem-clasping"	12
9	"Hairs on stem appressed"	"Scaevola microphylla"
9	"Hairs on stem loose or at 90 °"	10
10	"Peduncles more than 10 mm long"	"Scaevola pilosa"
10	"Peduncles less than 10 mm long"	11
11	"Racemes loose; bracts not overlapping at flowering; plant ascending or decumbent; leaves 15–35 mm wide"	"Scaevola auriculata"
11	"Racemes compact; bracts overlapping at flowering; plant erect; leaves to 20 mm but mostly to 15 mm wide"	"Scaevola macrophylla"
12	"Sepals free or connate only at base"	13
12	"Sepals connate at least in lower third, or reduced to rim, or obsolete"	20
13	"Stems with conspicuous ridges (except Scaevola parvifolia ); at least upper, cauline leaves reduced"	14
13	"Stems without conspicuous ridges; cauline leaves well developed"	16
14	"Stems glabrous or nearly so"	"Scaevola depauperata"
14	"Stems variously hairy"	15
15	"Stems tortuous"	"Scaevola tortuosa"
15	"Stems straight"	"Scaevola parvifolia"
16	"Bracteoles dentate"	"Scaevola calliptera"
16	"Bracteoles entire"	17
17	"Leaves with revolute margins; sepals to 3 mm long"	"Scaevola tenuifolia"
17	"Leaves with recurved margins or flat; sepals usually more than 3 mm long"	18
18	"Petal wings not striate (eastern Australia)"	"Scaevola ramosissima"
18	"Petal wings striate (W.A.)"	19
19	"Bracteoles linear; petals deep purple"	"Scaevola phlebopetala"
19	"Bracteoles elliptic to obovate; petals blue to purplish"	"Scaevola striata"
20	"Plant prostrate"	"Scaevola hookeri"
20	"Plant erect or ascending"	21
21	"Cauline leaves 25–90 mm long, to 6 mm wide; shrub or subshrub (Pilbara region, W.A.)"	22
21	"At least upper cauline leaves reduced to c. 4 mm long; many-stemmed perennial (central arid regions)"	23
22	"Plant scurfy with substellate hairs; corolla with substellate hairs outside"	"Scaevola acacioides"
22	"Plant ±viscid, glabrous or with simple, antrorse hairs; corolla with simple hairs outside"	"Scaevola cunninghamii"
23	"Stems mostly glabrous; corolla densely puberulous outside"	"Scaevola depauperata"
23	"Stems mostly puberulous and with scattered, long, simple hairs; corolla with short and long, stiff, arcuate to appressed hairs outside"	"Scaevola basedowii"
24	"Adaxial surface of indusium with basal tuft of prominent bristles exceeding lips"	25
24	"Adaxial surface of indusium glabrous, or with short basal bristles which do not exceed lips"	42
25	"Leaves ±stem-clasping"	26
25	"Leaves not stem-clasping"	29
26	"Outside of corolla with dense, silvery, closely appressed hairs hiding surface"	"Scaevola platyphylla"
26	"Outside of corolla, at least at base, with hairs loose, surface clearly visible between hairs; or glabrous"	27
27	"Hairs on stem ±appressed"	"Scaevola microphylla"
27	"Hairs on stem not appressed"	28
28	"Inflorescence loose, the bracts not overlapping at flowering; plant ascending or decumbent; leaves 15–35 mm wide"	"Scaevola auriculata"
28	"Inflorescence compact, the bracts overlapping at flowering; plant erect; leaves to 20 mm but mostly to 15 mm wide"	"Scaevola macrophylla"
29	"Corolla glabrous outside"	30
29	"Corolla hairy outside"	31
30	"Leaves linear to narrowly oblong, less than 2 mm wide, usually entire"	"Scaevola graminea"
30	"Leaves elliptic to cuneate, 3–23 mm wide, mostly dentate"	"Scaevola laciniata"
31	"Flowers mostly in dense thyrses, i.e. several flowers present in axils of at least lower bracts"	32
31	"Flowers in spikes or spike-like thyrses"	33
32	"Leaves with scattered fine white hairs, the surface clearly visible"	"Scaevola cuneiformis"
32	"Leaves with surface hidden beneath dense, silvery hairs"	"Scaevola argentea"
33	"Stems ridged or lateral stems often spinescent; cauline leaves usually reduced"	34
33	"Stems not ridged; not spinescent; leaves well developed"	36
34	"Indusium with basal tuft of brown bristles on adaxial surface"	"Scaevola chrysopogon"
34	"Indusium with basal tuft of white or purple bristles on adaxial surface"	35
35	"Hairs on ovary and fruit golden"	"Scaevola restiacea"
35	"Hairs on ovary and fruit white"	"Scaevola oxyclona"
36	"Hairs on stem coarse, mostly yellowish"	"Scaevola aemula"
36	"Hairs on stem fine and white, or stems glabrous"	37
37	"Stems with mostly simple, antrorse, often appressed hairs"	38
37	"Stems glabrous or with loose, simple hairs and/or glandular hairs"	40
38	"Prostrate plant with ±recurved leaves (south-western W.A.)"	"Scaevola argentea"
38	"Plant ascending or erect; leaves flat (not in W.A.)"	39
39	"Hairs on stem mostly arcuate, sometimes present only on young stems"	"Scaevola humilis"
39	"Hairs on stem straight, loosely appressed"	"Scaevola ovalifolia"
40	"Leaves glabrous or almost so"	"Scaevola collina"
40	"Leaves densely hairy"	41
41	"Leaves obovate, narrowing abruptly toward base"	"Scaevola obovata"
41	"Leaves narrowly elliptic to obovate, tapering gradually toward base"	"Scaevola amblyanthera"
42	"Plant glabrous or glabrescent (except flowers), or with very few scattered hairs, or viscid and varnished"	43
42	"Plant variously hairy or scabrous"	61
43	"Fruit beaked, sometimes shortly so; endocarp like a woody sponge or with woody plates or spines surrounded by a membranous skin"	"Scaevola collaris"
43	"Fruit not beaked; endocarp solid except for fertile locules, and (in some species) 2 sterile cavities"	44
44	"Leaves glaucous; upper leaves stem-clasping"	"Scaevola brookeana"
44	"Leaves not both glaucous and stem-clasping"	45
45	"Plant prostrate"	46
45	"Plant erect or ascending"	47
46	"Leaves to 2 mm wide; corolla with white hairs outside"	"Scaevola pulvinaris"
46	"Leaves 2–15 mm wide; corolla with golden hairs outside"	"Scaevola repens"
47	"Fruit with coarse, arcuate, simple, golden hairs"	"Scaevola restiacea"
47	"Fruit with soft, white, simple hairs, or glabrous"	48
48	"Leaves basal or towards base of stems, linear to oblanceolate, 6–20 cm long, tapering gradually to a broadened base"	"Scaevola lanceolata"
48	"Leaves scattered along stem"	49
49	"Sepals free, acute"	50
49	"Sepals an undulate rim or obtuse and connate"	51
50	"Divaricate shrub; indusium with scattered hairs (northern Australia)"	"Scaevola angulata"
50	"Herb, not divaricate; indusium with stiff basal hairs or glabrous (south-eastern Australia)"	"Scaevola albida"
51	"Fruit smooth or grooved"	52
51	"Fruit rugose or tuberculate"	56
52	"Fruit with swollen ribs, often gibbous"	"Scaevola thesioides"
52	"Fruit without swollen ribs, not gibbous"	53
53	"Plant not viscid"	"Scaevola porocarya"
53	"Plant viscid on young parts"	54
54	"Fruit dry; leaves sessile"	"Scaevola nitida"
54	"Fruit fleshy; leaves shortly petiolate"	55
55	"Leaves elliptic to oblong, 17–40 mm long"	"Scaevola myrtifolia"
55	"Leaves obovate-elliptic to spathulate, 10–14 mm long"	"Scaevola bursariifolia"
56	"Flowers in lateral spikes mostly shorter than leaves"	"Scaevola oldfieldii"
56	"Flowers in terminal spikes mostly longer than leaves"	57
57	"Indusium with short, stiff hairs towards base on upper surface"	"Scaevola glabrata"
57	"Indusium glabrous or with a few long hairs on upper surface"	58
58	"Leaves distinctly petiolate, ovate to orbicular"	"Scaevola crassifolia"
58	"Leaves sessile"	59
59	"Bracts distinctly different from foliage leaves"	"Scaevola angustata"
59	"Bracts intergrading with leaves"	60
60	"Leaves elliptic to obovate or narrowly oblong, 9–34 mm long"	"Scaevola macrostachya"
60	"Leaves linear to narrowly oblanceolate, 15–120 mm long"	"Scaevola globulifera"
61	"Plant with conspicuous, glandular hairs"	62
61	"Plant without conspicuous glandular hairs, sometimes with minute ones scarcely visible to naked eye"	66
62	"Plant brownish from glandular hairs with brown heads, and long, simple, yellowish hairs"	"Scaevola glandulifera"
62	"Plant not brownish; glandular hairs yellowish and simple hairs white"	63
63	"Leaves linear to narrowly elliptic, recurved"	"Scaevola linearis"
63	"Leaves oblanceolate to obovate, flat"	64
64	"Bracts very different from foliage leaves, much shorter"	"Scaevola revoluta"
64	"Bracts similar to foliage leaves but smaller"	65
65	"Petal wings 1–2 mm wide; hairs on back of indusium few, long, not appressed (south-western W.A.)"	"Scaevola oldfieldii"
65	"Petal wings to 10 mm wide; hairs on back of indusium many, short, appressed (Qld)"	"Scaevola glutinosa"
66	"Ovary and fruit glabrous or nearly so (sometimes ovary and fruit hidden by long hairs from below base)"	67
66	"Ovary and fruit hairy"	83
67	"Bracteoles connate along one margin"	"Scaevola tomentosa"
67	"Bracteoles free"	68
68	"Leaves basal or toward base of stems, 6–20 cm long, tapering gradually to a broadened base"	"Scaevola lanceolata"
68	"Leaves scattered along stems"	69
69	"Lateral inflorescences shorter than or equal to leaves"	70
69	"Inflorescences much longer than leaves"	75
70	"Flowers in woolly heads, to 3 mm long"	"Scaevola globosa"
70	"Flowers in spikes, more than 6 mm long"	71
71	"Plant prostrate or decumbent"	72
71	"Plant erect or ascending"	74
72	"Fruit fleshy (S.A., Qld, N.S.W., Vic.)"	"Scaevola calendulacea"
72	"Fruit dry (W.A.)"	73
73	"Corolla with golden hairs outside"	"Scaevola repens"
73	"Corolla with white hairs outside"	"Scaevola ballajupensis"
74	"Leaves glabrescent or with scattered hairs"	"Scaevola oldfieldii"
74	"Leaves with dense silky hairs"	"Scaevola sericophylla"
75	"Prostrate or decumbent plant of coastal dunes"	76
75	"Erect or ascending shrubs, rarely on coastal dunes"	77
76	"Fruit fleshy, purple"	"Scaevola calendulacea"
76	"Fruit dry, greenish"	"Scaevola albida"
77	"Bracteoles mostly to 4 mm long"	78
77	"Bracteoles mostly more than 4 mm long"	79
78	"Upper flowers at least twice as long as their subtending bracts"	"Scaevola revoluta"
78	"Upper flowers equalling or slightly longer than their subtending bracts"	"Scaevola virgata"
79	"Upper bracts ovate, very different in size and shape from foliage leaves"	"Scaevola virgata"
79	"Upper bracts either linear to narrowly elliptic, different in size and shape from foliage leaves, or broader and similar to foliage leaves"	80
80	"Leaves linear to oblanceolate, mostly more than 6 cm long"	81
80	"Leaves obovate to oblong, to 5.5 cm long"	82
81	"Fruit rugose, to 4 mm long, with 2 fertile locules"	"Scaevola anchusifolia"
81	"Fruit grooved, otherwise smooth, to 11 mm diam., with 4 fertile locules"	"Scaevola porocarya"
82	"Plant softly, densely hairy"	"Scaevola browniana"
82	"Plant loosely hairy with stiff, coarse hairs"	"Scaevola macrostachya"
83	"Flowers in lateral spikes mostly shorter than leaves"	84
83	"Flowers in terminal spikes or thyrses usually longer than leaves"	87
84	"Sepals free; leaves ±hispid, hairs both simple and minute glandular"	"Scaevola paludosa"
84	"Sepals reduced to rim; leaves tomentose with dense, simple or felted hairs"	85
85	"Axils woolly, hairs felted, tangled, clearly different from other hairs"	"Scaevola canescens"
85	"Axillary hairs silky, not felted, scarcely distinguishable from other hairs"	86
86	"Inflorescence elongate to 20 cm long (W.A.)"	"Scaevola spicigera"
86	"Inflorescence condensed to 6 cm long (S.A.)"	"Scaevola linearis"
87	"Fruit and ovary with two lateral protuberances and vertical rows of tubercles"	"Scaevola densifolia"
87	"Fruit and ovary irregularly rugose or tuberculate or smooth"	88
88	"Plant prostrate forming mats"	89
88	"Plant erect, ascending, or decumbent, not forming mats"	92
89	"Axils conspicuously woolly"	"Scaevola humifusa"
89	"Axillary hairs ±inconspicuous"	90
90	"Leaves linear, entire (south-western Australia)"	"Scaevola pulvinaris"
90	"Leaves broader than linear (south-eastern Australia)"	91
91	"Flowers sessile"	"Scaevola albida"
91	"Flowers with stalks below bracteoles"	"Scaevola hookeri"
92	"Barbulae clavate, with swollen papillate head on short stalk"	"Scaevola pulchella"
92	"Barbulae simple or with papillate head on long stalk"	93
93	"Hairs on outside of corolla stiff and brownish yellow towards top"	94
93	"Hairs on outside of corolla white"	95
94	"Leaves mostly more than 2 mm wide; barbulae simple"	"Scaevola hamiltonii"
94	"Leaves less than 2 mm wide; barbulae papillate apically"	"Scaevola eneabba"
95	"Fruit covered with arcuate, simple, golden hairs; leaves mostly reduced"	"Scaevola restiacea"
95	"Fruit with whitish hairs; leaves well developed"	96
96	"Leaves with recurved to revolute margins"	"Scaevola linearis"
96	"Leaves flat"	97
97	"Sepals acute (northern Australia)"	"Scaevola angulata"
97	"Sepals obtuse or forming a rim (mostly western, southern and central arid regions)"	98
98	"Hairs on back of indusium sparse, usually neither stiff nor straight, sometimes absent"	99
98	"Hairs on back of indusium numerous, straight, stiff"	100
99	"Leaves basal or towards base of scapose stems, more than 60 mm long"	"Scaevola lanceolata"
99	"Leaves scattered along stems, to 60 mm long"	"Scaevola virgata"
100	"Beard in corolla throat sparse; ovary 1-locular except at base (mostly E of Great Dividing Ra. and along S coast)"	"Scaevola albida"
100	"Beard in corolla throat dense; ovary 2-locular except near top (mostly drier areas W of Great Dividing Ra.)"	101
101	"Hairs soft, short, usually very dense; leaves with small teeth or entire"	"Scaevola ovalifolia"
101	"Hairs coarse, long, not appressed; leaves usually prominently triangular-toothed"	"Scaevola parvibarbata"