1	"Mature leaves reduced to phyllodes or not developed at all"	2
1	"Leaves all bipinnate"	136
2	"Flowers in more or less globular heads"	3
2	"Flowers in cylindrical spikes"	115
3	"Phyllodes either absent (occasional twigs rarely with a few articulate phyllodes), or continuous with the branches"	4
3	"Phyllodes present and articulate on the branches"	5
4	"Phyllodes normally absent, if present then articulate on branch; flowers 3-8 per head"	"Acacia spinescens"
4	"Phyllodes present, continuous with branch; flowers c. 30 per head"	"Acacia continua"
5	"Phyllodes flat with 1 major longitudinal vein visible on each face or more or less terete and 4-veined, or 4-angled"	6
5	"Phyllodes flat with 2 or more major longitudinal veins visible on each face or more or less terete and many-veined"	77
6	"Flower-heads (1-several) on simple peduncles in the axils of phyllodes or on inconspicuous short common peduncles"	7
6	"Flower-heads distinctly racemose, the raceme either axillary or terminal"	43
7	"Phyllodes innocuous"	8
7	"Phyllodes pungent-pointed"	33
8	"Phyllodes to 2 cm long"	9
8	"Phyllodes 2-12 cm long"	19
9	"Branchlets spinescent"	10
9	"Branchlets not spinescent"	11
10	"Branchlets hairy; phyllodes narrow-cuneate, humped at the summit"	"Acacia acanthoclada"
10	"Branchlets glabrous; phyllodes broadly lanceolate, never humped"	"Acacia erinacea"
11	"Stipules prominent and spiny"	"Acacia paradoxa"
11	"Stipules when present minute and not spiny"	12
12	"Shrubs prominently resinous; phyllodes viscid"	13
12	"Shrubs not or sometimes very slightly resinous; phyllodes not viscid, 5-20 mm long"	14
13	"Phyllodes flat, obliquely obovate, 2-5 mm long"	"Acacia rhetinocarpa"
13	"Phyllodes terete-compressed, 1-2 cm long"	"Acacia helmsiana"
14	"Phyllodes ovate-oblanceolate to obovate-orbicular"	15
14	"Phyllodes linear or oblong"	17
15	"Phyllodes mid-green; heads 10-15-flowered; peduncles often longer than phyllodes; legumes spirally coiled"	"Acacia acinacea"
15	"Phyllodes grey-green, heads 20-30 flowered"	16
16	"Peduncles mostly longer than phyllodes, heads 8-10 mm diameter"	"Acacia spilleriana"
16	"Peduncles mostly shorter than phyllodes, heads about 5 mm diameter"	"Acacia brachybotrya"
17	"Branchlets pubescent, almost terete; phyllodes with the vein close to the lower margin"	"Acacia lineata"
17	"Branchlets glabrous, angular"	18
18	"Phyllodes erect, imbricate; apex almost truncate except for an oblique mucro"	"Acacia imbricata"
18	"Phyllodes spreading-erect, not imbricate, apex obtuse"	"Acacia triquetra"
19	"Branchlets acutely angular, often compressed and winged"	20
19	"Branchlets slightly angular or striate, becoming almost terete, never flattened or winged"	22
20	"Phyllodes without reticulate lateral veins; peduncles slender, 2-4 (rarely 1) per axil; heads 12-20-flowered; seeds longitudinally placed in the legume"	"Acacia triquetra"
20	"Phyllodes with obviously reticulate lateral veins; peduncles stout, solitary; heads c. 40-flowered; seeds transversely placed in the legume"	21
21	"Phyllodes often glaucous, broadly ovate, 10-35 mm broad, up to twice as long as broad"	"Acacia anceps var. anceps"
21	"Phyllodes never glaucous, linear-oblong, oblanceolate, 5-13 mm broad, 5-12 times longer than broad"	"Acacia anceps var. angustifolia"
22	"Stipules frequently prominent, spiny; seeds transversely placed in the legume"	23
22	"Stipules when present small, never spiny; seeds longitudinally placed in the legume"	24
23	"Branchlets and phyllodes glabrous to almost so"	"Acacia victoriae var. victoriae"
23	"Branchlets and phyllodes villous with soft spreading hairs"	"Acacia victoriae var. arida"
24	"Branchlets and phyllodes pubescent or becoming glabrous when mature"	25
24	"Branchlets and phyllodes glabrous (young phyllodes minutely pubescent in Acacia microcarpa)"	27
25	"Phyllodes always hairy, golden pubescent when young, silky-silvery with more or less appressed hairs when mature, flower-heads mostly shorter than phyllode, longer if common peduncle well developed"	"Acacia argyrophylla"
25	"Phyllodes silky grey hairy when young, becoming glabrous with age"	26
26	"Peduncle mostly shorter than phyllode, heads about 5 mm diameter"	"Acacia brachybotrya"
26	"Peduncles mostly longer than leaf, heads 8-10 mm diameter"	"Acacia spilleriana"
27	"Phyllodes terete or if flattened then not exceeding 5 mm broad; apex always uncinated"	28
27	"Phyllodes distinctly flattened, 5-15 mm broad; apex sometimes mucronate, never distinctly uncinated"	30
28	"Apex always blunt with two glands at summit, phyllodes often slightly up-curved"	"Acacia praemorsa"
28	"Apex always acute or acuminate"	29
29	"Peduncle in axillary racemes commonly 1-4 mm long with 2-4 peduncles rarely greater, rarely solitary"	"Acacia calamifolia"
29	"Peduncles almost always solitary"	"Acacia nematophylla"
30	"Branchlets and young phyllodes viscid; phyllodes punctate, apex acute, with up to 4 glands along the upper margin"	"Acacia dodonaeifolia"
30	"Branchlets and phyllodes not viscid, or phyllodes not punctate, apex obtuse, only 1 gland along the upper margin"	31
31	"Phyllodes 5-12 cm long, apex mostly obtuse, mid-vein prominent and many fine lateral veins, peduncles < 5 mm"	"Acacia stricta"
31	"Phyllodes to 5 cm long, apex acute or obtuse, mid-vein often obscure, peduncles > 5 mm"	32
32	"Phyllode apex obtuse, phyllodes straight or with slight upward curve, young tips more or less glabrous"	"Acacia microcarpa"
32	"Phyllode apex acute, phyllodes slightly recurved, young tips densely pubescent (later glabrous)"	"Acacia halliana"
33	"Stipules prominent and spiny"	34
33	"Stipules when present small and not spiny"	35
34	"Phyllodes flat, glabrous, rhomboid-orbicular, 1-2 cm long"	"Acacia strongylophylla"
34	"Phyllodes terete, minutely pubescent, 3-6 cm long"	"Acacia pickardii"
35	"Phyllodes humped on the upper margin"	36
35	"Phyllodes not humped on the upper margin"	37
36	"1 prominent vein parallel to and near the lower margin; heads whitish-yellow, 20-30-flowered; legumes straight or curved"	"Acacia gunnii"
36	"1 prominent oblique vein with 2-4 rather obscure veins arising from near the base; heads golden-yellow, 8-15-flowered; legumes spirally coiled"	"Acacia pravifolia"
37	"Phyllodes flat, obliquely ovate-orbicular or obovate, 5-15 mm broad, up to twice as long as broad"	"Acacia merrallii"
37	"Phyllodes flat or angular, linear-subulate or linear-lanceolate or narrow-elliptic, 1-5 mm broad, more than twice as long as broad"	38
38	"Branchlets resinous; phyllodes viscid (at least when young), 1-2.5 cm long"	39
38	"Branchlets not resinous; phyllodes not viscid, 2-6 cm long"	40
39	"Heads c. 20-flowered, creamy-yellow; phyllodes spreading horizontally, broadest at or near the base, viscid, shining"	"Acacia rupicola"
39	"Heads 50-60-flowered, mid-yellow; phyllodes erect or spreading, broadest near the centre, slightly viscid"	"Acacia maitlandii"
40	"Phyllodes pubescent"	"Acacia carnei"
40	"Phyllodes glabrous (at least with age)"	41
41	"Phyllodes usually clustered in groups 2-5, heads c. 50-flowered"	"Acacia tetragonophylla"
41	"Phyllodes scattered, not clustered, heads less than c. 20-flowered"	42
42	"Heads creamy yellow; phyllodes at right angles to branch, apex tapered"	"Acacia genistifolia"
42	"Heads golden yellow; phyllodes ascending, apex abruptly pungent"	"Acacia mutabilis"
43	"Unexpanded racemes at first covered with large imbricate (scale-like) bracts"	44
43	"Unexpanded racemes not covered with large imbricate bracts"	45
44	"Branchlets angular-striate, soon terete, pruinose; flowers c. 12 per head; legumes 6-12 cm long, 7-10 mm broad"	"Acacia iteaphylla"
44	"Branchlets acutely angled, triangular appearing flattened, smooth, greenish; flowers c.6-10 per head; legumes 2-4 mm long, 12-20 mm broad"	"Acacia suaveolens"
45	"Phyllodes terete-compressed or quadrangular"	46
45	"Phyllodes distinctly flattened"	49
46	"Phyllodes more than 13 cm long"	"Acacia araneosa"
46	"Phyllodes 4-13 cm long"	47
47	"Phyllode apex acute, pungent-pointed"	"Acacia prainii"
47	"Phyllode apex uncinate or with a short curved mucro, not pungent"	48
48	"Phyllodes quadrangular; apex with a swollen gland below a short curved mucro"	"Acacia pachyacra"
48	"Phyllodes terete-compressed; apex uncinate, without a swollen gland"	"Acacia calamifolia"
49	"Mature phyllodes always covered with short hairs"	50
49	"Mature phyllodes-glabrous"	51
50	"Hairs short, appressed, silky; peduncle rarely exceeding phyllodes; phyllodes < 11 mm wide"	"Acacia argyrophylla"
50	"Hairs dense or scattered, erect; peduncle exceeding phyllodes; phyllodes > 15 mm wide"	"Acacia podalyriifolia"
51	"Flowers 30 or fewer in each head"	52
51	"Flowers more than 30 in each head"	63
52	"Flowers 4-merous, fewer than 6 in each head"	"Acacia myrtifolia"
52	"Flowers 5-merous, more than 6 in each head"	53
53	"Calyx distinctly lobed (sepals free to the base in Acacia victoriae)"	54
53	"Calyx almost truncate, indistinctly lobed"	61
54	"Phyllodes oblanceolate, narrow-obovate"	55
54	"Phyllodes linear, narrow-elliptic to lanceolate (sometimes oblanceolate in Acacia jennerae)"	57
55	"Phyllode apex uncinate"	"Acacia retinodes var. uncifolia"
55	"Phyllode apex obtuse or acute never uncinate"	56
56	"Branchlets prominently angular, longitudinally striate; heads 15-20-flowered, on slender peduncles; funicle encircling the seed"	"Acacia wattsiana"
56	"Branchlets slightly angular; heads c. 25-flowered, on stout peduncles; funicle short, not encircling the seed"	"Acacia hakeoides"
57	"Stipules prominent, spiny; seeds almost globular, transverse in the legume"	58
57	"Stipules inconspicuous, never spiny; seed ovoid, longitudinal in the legume"	59
58	"Branchlets and phyllodes glabrous or almost so"	"Acacia victoriae var. victoriae"
58	"Branchlets and phyllodes villous with soft spreading hairs"	"Acacia victoriae var. arida"
59	"Phyllodes falcate"	"Acacia leiophylla"
59	"Phyllodes straight or slightly curved"	60
60	"Phyllodes 2-5 cm long, 1 gland near the base; flowers 8-15 in each head"	"Acacia quornensi"
60	"Phyllodes 5-15 cm long, 1-3 glands along the upper margin; flowers 20-30 in each head"	"Acacia jennerae"
61	"Phyllodes greyish, flaccid, not wrinkled when dry, usually pendulous, never mucronate; legumes woody, hardly constricted, not breaking easily into 1-seeded segments, often suckering"	"Acacia salicina"
61	"Phyllodes thick, green and wrinkled when dry, usually mucronate; legumes hard, woody, constricted between the seeds, easily breaking into 1-seeded segments"	62
62	"Phyllodes narrow, 1-4 mm wide, apex rounded and more or less symmetrical with small erect central mucro, legumes 4-5 mm wide, mostly sub coastal"	"Acacia cupularis"
62	"Phyllodes mostly broader, 4-14 mm wide, apex obliquely mucronate to uncinate, legumes 5-9 mm wide, very widespread in S.Aust"	"Acacia ligulata"
63	"Sepals free to the base"	"Acacia murrayana"
63	"Sepals united for half or more of their length"	64
64	"Phyllodes linear-cultrate or narrow-elliptic"	65
64	"Phyllodes narrow- to broad-lanceolate or oblanceolate"	66
65	"Phyllodes with 2-4 small glands along the upper margin; peduncles thick, less than 10 mm long; seeds compressed, longitudinal"	"Acacia beckleri"
65	"Phyllodes with a single conspicuous gland at the base; peduncles slender, 10-38 mm long; seeds almost orbicular, transverse or oblique in the legume"	"Acacia pruinocarpa"
66	"Younger shoots, petiole, axil and pods white pruinose"	"Acacia cretacea"
66	"Younger shoots, petiole and axil not conspicuously white pruinose"	67
67	"Branchlets flattened, acutely angled or ribbed, becoming almost terete when mature"	68
67	"Branchlets slightly angular, soon terete, smooth"	70
68	"Branchlets and inflorescence rhachis prominently flexuose; phyllodes falcate, spreading or often reflexed"	"Acacia gillii"
68	"Branchlets and inflorescence rhachis not or only slightly flexuose; phyllodes straight or slightly curved, spreading not reflexed"	69
69	"Flowers pale-yellow; legumes almost straight-edged; funicle long, encircling the seed"	"Acacia retinodes var. retinodes"
69	"Flowers a bright golden-yellow; legumes slightly constricted between the seeds; funicle short, never encircling the seed (garden escape)"	"Acacia saligna"
70	"Phyllodes 2-5 mm broad, lateral veins fine, rather obscure or absent"	71
70	"Phyllodes more than 5 mm broad, lateral veins numerous, conspicuous"	72
71	"Phyllodes broadest just above the centre but tapering at both ends, a small gland 15 mm or more from the base; peduncles hoary"	"Acacia rivalis"
71	"Phyllodes broadest well above the centre, tapering gradually to the base, a small gland 5-10 mm from the base; peduncles glabrous"	"Acacia calamifolia"
72	"Phyllodes with conspicuous raised anastomosing lateral veins"	"Acacia validinervia"
72	"Phyllodes with fine sunken reticulate or anastomosing lateral veins"	73
73	"Seeds transverse in the legume, funicle encircling the seed"	74
73	"Seeds longitudinal in the legume; funicle short or, if long, then encircling the seed"	75
74	"Phyllodes rigid, coriaceous, + straight margin usually prominent apex often blunt"	"Acacia notabilis"
74	"Phyllodes flexible, often falcate, margin not prominent, apex mostly acute, more or less hooked"	"Acacia alcockii"
75	"Phyllode apices obviously acuminate, surfaces often scurfy; legume thick, coriaceous, 10-25 mm long, 10-15 mm broad; seed broadly ovoid"	"Acacia confluens"
75	"Phyllode apices obtuse or acute; legumes firmly chartaceous, 5-12 cm long, 5-7 mm broad, seeds ovoid-oblong"	76
76	"Phyllodes tapering prominently towards the base; funicle short, not encircling the seed"	"Acacia pycnantha"
76	"Phyllodes tapering gradually to both ends, narrow-elliptic to oblanceolate; funicle long, more or less encircling the seed"	"Acacia cretacea"
77	"Flower-heads (1-several) on simple peduncles in the axils of phyllodes or on inconspicuous short common peduncles"	78
77	"Flower-heads distinctly racemose, the racemes either axillary or terminal"	106
78	"Flower heads sessile or on very short pubescent peduncles up to 3 mm 1ong; phyllodes flat, pungent-pointed"	"Acacia oswaldii"
78	"Flower heads distinctly pedunculate, more than 3 mm long"	79
79	"Phyllode apex distinctly pungent-pointed"	80
79	"Phyllode apex innocuous"	84
80	"Phyllodes broadly triangular, flat, 4-12 mm long, upper margin humped"	"Acacia pravifolia"
80	"Phyllodes linear, terete-compressed"	81
81	"Branches and phyllodes asperulate"	"Acacia enterocarpa"
81	"Branches and phyllodes not asperulate"	82
82	"Phyllodes c. 16-veined, veins obscure, fine and close together"	"Acacia nyssophylla"
82	"Phyllodes 6-8-veined, veins prominent well spaced"	83
83	"Phyllodes 6-veined, small stipular prickles usually present"	"Acacia hexaneura"
83	"Phyllodes 8-veined, stipular prickles absent"	"Acacia colletioides"
84	"Branches and phyllodes resinous, viscid"	85
84	"Branchlets and phyllodes not resinous (or only slightly viscid on young branchlets or immature phyllodes)"	93
85	"Phyllodes more than 2 mm broad, flat, and with 2 (rarely 3) prominent longitudinal veins"	86
85	"Phyllodes less than 2 mm broad, flattened to terete (flattened phyllodes with 3 (rarely 2) prominent longitudinal veins)"	89
86	"Phyllodes with obvious secondary anastomosing veins"	87
86	"Phyllodes without secondary veins (or if present then rather obscure never anastomosing)"	88
87	"Phyllodes oblong or narrowly oblong, 1.5-4 cm long, 3-7 mm broad secondary veins fine, reticulate; legumes densely covered with whitish hairs; seeds longitudinal in the legume"	"Acacia montana"
87	"Phyllodes broadly ovate to oblanceolate, 2-7 cm long, 5-15 mm broad, secondary veins raised and more prominent than above; legumes varnished; seeds transverse in the legume"	"Acacia dictyophleba"
88	"Phyllodes 4-12 cm long, punctate, linear-lanceolate, apex acute, with 2 parallel veins only"	"Acacia verniciflua"
88	"Phyllodes 1-2.5 cm long, oblong, cuneate, not punctate, with a short oblique mucro, 2 prominent veins with 1-3 fainter parallel veins"	"Acacia wilhelmiana"
89	"Phyllodes narrow-linear, flattened, never terete; apex uncinate; flowers 4-merous"	"Acacia barattensis"
89	"Phyllodes filiform, terete or compressed, apex with a small oblique mucro, or obtuse with scarcely any point"	90
90	"Phyllodes 5-10 cm long"	"Acacia gracilifolia"
90	"Phyllodes 1-3.5 cm long"	91
91	"Peduncles golden-pubescent"	"Acacia wilhelmiana"
91	"Peduncles glabrous, viscid"	92
92	"Phyllodes straight or slightly curved, with 5 or 6 longitudinal veins"	"Acacia menzelii"
92	"Phyllodes curved and shallowly sigmoid, 2-veined"	"Acacia helmsiana"
93	"Branchlets spinescent"	"Acacia basedowii"
93	"Branchlets not spinescent"	94
94	"Phyllodes distinctly flattened, with 2-7 more or less prominent veins pre-sent on each face separated by distinct interstices"	95
94	"Phyllodes flat, terete or subterete, with numerous fine, closely placed veins often only visible under a lens"	100
95	"Phyllodes with 2 prominent veins, more or less elliptic, 4-12 mm long"	"Acacia glandulicarpa"
95	"Phyllodes with 3-7 more or less prominent veins, linear-lanceolate, oblanceolate or narrowly obovate, 1-10 cm long"	96
96	"Phyllodes often more than 4 mm wide, hoary, often sub-falcate"	97
96	"Phyllodes rarely 4 mm wide, green"	98
97	"Pod more or less straight, 8-12 mm wide, seeds longitudinal"	"Acacia cambagei"
97	"Pod twisted and coiled, 12-25 .mm wide, seeds transverse"	"Acacia georginae"
98	"Trees; phyllodes more or less flaccid, linear, lanceolate, always with 3 prominent longitudinal veins on each face and a number of rather obscure well spaced reticulate lateral veins between them"	"Acacia estrophiolata"
98	"Shrubs; phyllodes thick, hard or more or less fleshy, oblanceolate, narrowly obovate or linear-cuneate, with 3-7 longitudinal veins, on each face, no reticulate lateral veins"	99
99	"Branchlets and peduncles glabrous or slightly hairy"	"Acacia sclerophylla var. sclerophylla"
99	"Branchlets and peduncles hoary"	"Acacia farinosa"
100	"Phyllodes 1-3.5 cm long, glabrous"	101
100	"Phyllodes more than 3.5 cm long, pubescent to some degree"	103
101	"Phyllodes fleshy, grooved and wrinkled when dry"	"Acacia pinguifolia"
101	"Phyllodes not fleshy, smooth or only lightly grooved when dry"	102
102	"Resin hairs sparse to abundant on young growth, phyllode apex mostly blunt, peduncles 2-4 mm"	"Acacia sclerophylla var. lissophylla"
102	"Resin hairs lacking, branchlets and peduncles glabrous, phyllodes usually with short, acute, oblique apex, peduncles 6-11 mm"	"Acacia whibleyana"
103	"Phyllode apex obtuse or with a short rather hard but innocuous point, scarcely tapering-towards the base"	104
103	"Phyllode apex attenuate, delicately curved, not pungent except in Acacia sp. aff. papyrocarpa, more or less coarsely pungent"	105
104	"Phyllodes brittle, snapping easily; veins all fine, obscure; branches smooth, almost terete"	"Acacia havilandii"
104	"Phyllodes tough, not snapping easily; veins yellowish, some more prominent than others; branches slightly angular, with yellowish ribs"	"Acacia rigens"
105	"Legumes scarcely constricted between the seeds, reticulate, 5-8 mm broad"	"Acacia papyrocarpa"
105	"Legumes moniliform, not reticulate, c. 4 mm broad"	"Acacia loderi"
106	"Phyllodes terete or quadrangular"	107
106	"Phyllodes distinctly flattened"	108
107	"Phyllodes terete with 7 or 8 fine longitudinal veins, apex coarsely pungent"	"Acacia gilesiana"
107	"Phyllodes quadrangular with a prominent vein at each angle, apex thickened glandular"	"Acacia pachyacra"
108	"Phyllodes prominently 3-5-veined on each face with fine reticulate lateral veins between them"	109
108	"Phyllodes with numerous closely approximating very fine longitudinal veins (1-3 sometimes more prominent than the rest)"	111
109	"Phyllodes elliptic, lanceolate, 7-30 mm broad (usually more than 12 mm broad), with many obvious reticulate lateral veins"	"Acacia melanoxylon"
109	"Phyllodes narrowly obovate, oblong or lanceolate, up to 12 mm broad, with a few rather obscure lateral veins"	110
110	"Branchlets and peduncles hoary; phyllodes 4-6 mm broad; funicle short, folded under the seed, not encircling the seed"	"Acacia trineura"
110	"Branchlets and peduncles glabrous; phyllodes 6-12 mm broad; funicle a bright yellowish-orange, encircling the seed in a double fold"	"Acacia cyclops"
111	"Phyllodes hoary or densely covered with fine appressed silvery hairs"	112
111	"Phyllodes glabrous or sparsely pubescent (often scurfy in Acacia cambagei)"	113
112	"Mature phyllodes less than 15 cm long; heads 30-40-flowered; sepals free; legumes to 12 cm long, straight or curved"	"Acacia calcicola"
112	"Mature phyllodes usually more than 15 cm long; heads less than 30-flowered; sepals united; legumes 15 cm or more long, twisted"	"Acacia coriacea"
113	"Mature phyllodes more than 15 cm long, linear; veins numerous, prominent, with interstices"	"Acacia stenophylla"
113	"Mature phyllodes less than 15 cm long, lanceolate; veins numerous, fine, closely placed, 1-3 more prominent than the rest"	114
114	"Pods more or less straight. 8-12 mm wide; seeds longitudinal"	"Acacia cambagei"
114	"Pods twisted and coiled, 12-25 mm wide; seeds transverse"	"Acacia georginae"
115	"Phyllodes pungent-pointed"	116
115	"Phyllodes not pungent-pointed"	119
116	"Phyllodes mostly whorled, 1-veined"	"Acacia verticillata"
116	"Phyllodes never whorled, scattered, more than l-veined"	117
117	"Phyllodes terete, 8-20 cm long; veins fine and numerous"	"Acacia cyperophylla"
117	"Phyllodes flattened, 1-4 cm long, veins 3 or 4 and prominent"	118
118	"Phyllodes 1-2.5 cm long, c. 2 mm broad, with 3 prominent veins, flower spikes sub-sessile; flowers loosely arranged"	"Acacia rhigiophylla"
118	"Phyllodes 2-4 cm long, 2-5 mm broad, with 3 or 4 prominent veins; flower spikes distinctly pedunculate; flowers dense"	"Acacia oxycedrus"
119	"Phyllodes distinctly flattened"	120
119	"Phyllodes terete or sub-terete"	131
120	"Phyllodes more or less flaccid; seeds longitudinally placed in the legume"	121
120	"Phyllodes thickened, coriaceous, rigid"	125
121	"Phyllodes 8-33 mm broad"	122
121	"Phyllodes less than 8 mm broad, lacking intervening reticulate veins"	124
122	"Phyllodes falcate, silvery, with 3 principal lateral veins"	"Acacia cowleana"
122	"Phyllodes more or less straight, green, with five less prominent lateral veins"	123
123	"Phyllodes linear-lanceolate or narrow-elliptic, 6-15 cm long, 8-15 mm broad, usually more than 10 cm long"	"Acacia longifolia var. longifolia"
123	"Phyllodes obovate-oblong, 5-9 cm long, 12-35 mm broad, thicker and much more obtuse than the preceding variety"	"Acacia longifolia var. sophorae"
124	"Phyllodes 3-7 mm broad, with many rather obscure, closely approximating, longitudinal veins; receptacles golden-pubescent"	"Acacia olgana"
124	"Phyllodes 1-3 mm broad, usually with 3 prominent and distant veins (some-times to 5 on broad phyllodes); receptacles glabrous"	"Acacia symonii"
125	"Bark red, shedding in narrow curly strips, seeds longitudinal in legumes"	"Acacia rhodophloia"
125	"Bark grey, not shedding as above, seeds transverse or oblique"	126
126	"Phyllodes 2-4 (-5) mm wide, linear to very narrow elliptic"	127
126	"Phyllodes 4-20 mm wide, oblong to elliptic to falcate"	128
127	"Phyllodes narrow oblanceolate to oblong, often curved, apex more or less symmetrical, yellow-green"	"Acacia stowardii"
127	"Phyllodes terete to narrow linear, apex often slightly hooked, grey-green"	"Acacia aneura"
128	"Phyllodes mostly 1-2.5 cm long, most plants with dense opaque resin"	"Acacia minyura"
128	"Phyllodes mostly longer, some with resinous margins"	129
129	"Phyllode margins thick, crenulate, resinous young phyllodes silvery pubescent"	"Acacia tarculensis"
129	"Phyllode margins not as above"	130
130	"Phyllodes oblong-lanceolate, glabrous"	"Acacia kempeana"
130	"Phyllodes elliptic-falcate, densely simply hairy"	"Acacia ayersiana"
131	"Phyllodes ciliolate along the margins on the upper half to the finely non-pungent tip; spikes sessile; flowers 4-merous"	"Acacia burkittii"
131	"Phyllodes not ciliolate along margins, apex with short callous point or mucro, spikes pedunculate; flowers 5-merous"	132
132	"Branches angular, with resinous ridges; phyllodes filiform, 6-veined, deeply grooved, resinous, with several glands along their length, spikes short cylindrical or almost globular 1 cm or less long"	"Acacia gracilifolia"
132	"Branches more or less terete, with or without resin, phyllodes narrow linear 1-3 mm wide, finely striate with numerous veins; spikes 1-2 cm long, usually clearly pedunculate"	133
133	"Legume woody, cylindrical, hoary, marked with brown resinous parallel veins, 7-10 cm long"	"Acacia ramulosa"
133	"Legume not as above"	134
134	"Legume linear 5-6 cm long 2-2.5 mm wide, curved and twisted at maturity, flower spike rarely greater than 1 cm long"	"Acacia tenuissima"
134	"Legume oblong or obliquely oblong, 1-7 cm long 0.4-1.5 cm wide, flat or turgid, flower spikes mostly greater than 1 cm long"	135
135	"Legumes flat, narrowly winged, seeds transverse to oblique"	"Acacia aneura"
135	"Legumes flattish but turgid and biconvex, not winged, seeds longitudinal"	"Acacia cibaria"
136	"Inflorescence simple, solitary or 2-5 together"	137
136	"Inflorescence racemose or paniculate"	141
137	"Axillary spines absent"	138
137	"Axillary spines present"	139
138	"Flowering peduncle with bract at midpoint; pod deeply constricted, hoary pubescent"	"Acacia nilotica"
138	"Flowering peduncle without bract; pod scarcely constricted, glabrous"	"Acacia mitchellii"
139	"Pinnules 10-21 pairs; pods swollen, turgid"	"Acacia farnesiana"
139	"Pinnules 1-5 pairs; pods flat"	140
140	"Pinnules 1-2 pairs; flowering peduncle without bracts at midpoint; pod to 5 cm, glabrous"	"Acacia pulchella"
140	"Pinnules 1-5 pairs; flowering peduncle with bract about midpoint; pod 6-20 cm long, constricted between seeds, hoary tomentose"	"Acacia nilotica"
141	"Branchlets prominently angled with wing-like ridges almost glabrous; foliage dark-green; pinnules well separated"	"Acacia decurrens"
141	"Branchlets angled or striate but not winged, more or less densely pubescent, pruinose, foliage greyish-green, glaucous, bluish or silvery; pinnules crowded"	142
142	"Leaves with 2-6 pinna pairs, bluish-glaucous"	"Acacia baileyana"
142	"Leaves with 10-26 pinna pairs, greyish-green, glaucous or silvery"	143
143	"Leaf rhachis with a gland at the junction of each pinna pair and with additional glands between the pinna pairs"	"Acacia mearnsii"
143	"Leaf rhachis with a gland at the junction of each pinna pair, no additional glands between"	"Acacia dealbata"