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  Key to Acacias of South Australia
 
1 (1) Mature leaves reduced to phyllodes or not developed at all
Goto 2
  (2) Leaves all bipinnate
136
2 (1) Flowers in more or less globular heads
3
  (2) Flowers in cylindrical spikes
115
3 (1) Phyllodes either absent (occasional twigs rarely with a few articulate phyllodes), or continuous with the branches
4
  (2) Phyllodes present and articulate on the branches
5
4 (1) Phyllodes normally absent, if present then articulate on branch; flowers 3-8 per head
A.spinescens
  (2) Phyllodes present, continuous with branch; flowers c. 30 per head
A. continua
5 (1) Phyllodes flat with 1 major longitudinal vein visible on each face or more or less terete and 4-veined, or 4-angled
6
  (2) Phyllodes flat with 2 or more major longitudinal veins visible on each face or more or less terete and many-veined
7
6 (1) Flower-heads (1-several) on simple peduncles in the axils of phyllodes or on inconspicuous short common peduncles
8
  (2) Flower-heads distinctly racemose, the raceme either axillary or terminal
44
7 (1) Flower-heads (1-several) on simple peduncles in the axils of phyllodes or on inconspicuous short common peduncles
78
  (2) Flower-heads distinctly racemose, the racemes either axillary or terminal
106
8 (1) Phyllodes innocuous
9
  (2) Phyllodes pungent-pointed
34
9 (1) Phyllodes to 2 cm long
10
  (2) Phyllodes 2-12 cm long
20
10 (1) Branchlets spinescent
11
  (2) Branchlets not spinescent
12
11 (1) Branchlets hairy; phyllodes narrow-cuneate, humped at the summit
A. acanthoclada
  (2) Branchlets glabrous; phyllodes broadly lanceolate, never humped
A. erinacea
12 (1) Stipules prominent and spiny
A. paradoxa
  (2) Stipules when present minute and not spiny
13
13 (1) Shrubs prominently resinous; phyllodes viscid
14
  (2) Shrubs not or sometimes very slightly resinous; phyllodes not viscid, 5-20 mm long
15
14 (1) Phyllodes flat, obliquely obovate, 2-5 mm long
A. rhetinocarpa
  (2) Phyllodes terete-compressed, 1-2 cm long
A. helmsiana
15 (1) Phyllodes ovate-oblanceolate to obovate-orbicular
16
  (2) Phyllodes linear or oblong
18
16 (1) Phyllodes grey-green, heads 20-30 flowered
17
  (2) Phyllodes mid-green; heads 10-15-flowered; peduncles often longer than phyllodes; legumes spirally coiled
A. acinacea
17 (1) Peduncles mostly longer than phyllodes, heads 8-10 mm diameter
A. spilleriana
  (2) Peduncles mostly shorter than phyllodes, heads about 5 mm diameter
A. brachybotrya
18 (1) Branchlets pubescent, almost terete; phyllodes with the vein close to the lower margin
A. lineata
  (2) Branchlets glabrous, angular
19
19 (1) Phyllodes erect, imbricate; apex almost truncate except for an oblique mucro
A. imbricata
  (2) Phyllodes spreading-erect, not imbricate, apex obtuse
A. triquetra
20 (1) Branchlets acutely angular, often compressed and winged
21
  (2) Branchlets slightly angular or striate, becoming almost terete, never flattened or winged
23
21 (1) Phyllodes with obviously reticulate lateral veins; peduncles stout, solitary; heads c. 40-flowered; seeds transversely placed in the legume
22
  (2) Phyllodes without reticulate lateral veins; peduncles slender, 2-4 (rarely 1) per axil; heads 12-20-flowered; seeds longitudinally placed in the legume
A. triquetra
22 (1) Phyllodes often glaucous, broadly ovate, 10-35 mm broad, up to twice as long as broad
A. anceps var. anceps
  (2) Phyllodes never glaucous, linear-oblong, oblanceolate, 5-13 mm broad, 5-12 times longer than broad
A. anceps var. angustifolia
23 (1) Stipules frequently prominent, spiny; seeds transversely placed in the legume
24
  (2) Stipules when present small, never spiny; seeds longitudinally placed in the legume
25
24 (1) Branchlets and phyllodes glabrous to almost so
A. victoriae var. victoriae
  (2) Branchlets and phyllodes villous with soft spreading hairs
A. victoriae var. arida
25 (1) Branchlets and phyllodes pubescent or becoming glabrous when mature
25
  (2) Branchlets and phyllodes glabrous(young phyllodes minutely pubescent in A. microcarpa)
A. microcarpa
26 (1) 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
A. argyrophylla
  (2) Phyllodes silky grey hairy when young, becoming glabrous with age
27
27 (1) Peduncle mostly shorter than phyllode, heads about 5 mm diameter
A. brachybotrya
  (2) Peduncles mostly longer than leaf, heads 8-10 mm diameter
A. spilleriana
28 (1) Phyllodes terete or if flattened then not exceeding 5 mm broad; apex always uncinate
29
  (2) Phyllodes distinctly flattened, 5-15 mm broad; apex sometimes mucronate, never distinctly uncinate
31
29 (1) Apex always acute or acuminate
30
  (2) Apex always blunt with two glands at summit, phyllodes often slightly up-curved
A. praemorsa
30 (1) Peduncle in axillary racemes commonly 1-4 mm long with 2-4 peduncles rarely greater, rarely solitary
A. calamifolia
  (2) Peduncles almost always solitary
A. nematophylla
31 (1) Branchlets and young phyllodes viscid; phyllodes punctate, apex acute, with up to 4 glands along the upper margin
A. dodonaeifolia
  (2) Branchlets and phyllodes not viscid, or phyllodes not punctate, apex obtuse, only 1 gland along the upper margin
32
32 (1) Phyllodes 5-12 cm long, apex mostly obtuse, mid-vein prominent and many fine lateral veins, peduncles < 5 mm
A. stricta
  (2) Phyllodes to 5 cm long, apex acute or obtuse, mid-vein often obscure, peduncles > 5 mm
33
33 (1) Phyllode apex obtuse, phyllodes straight or with slight upward curve, young tips more or less glabrous
A. microcarpa
  (2) Phyllode apex acute, phyllodes slightly recurved, young tips densely pubescent (later glabrous)
A. halliana
34 (1) Stipules prominent and spiny
35
  (2) Stipules when present small and not spiny
36
35 (1) Phyllodes flat, glabrous, rhomboid-orbicular, 1-2 cm long
A. strongylophylla
  (2) Phyllodes terete, minutely pubescent, 3-6 cm long
A. pickardii
36 (1) Phyllodes humped on the upper margin
37
  (2) Phyllodes not humped on the upper margin
38
37 (1) 1 prominent vein parallel to and near the lower margin; heads whitish-yellow, 20-30-flowered; legumes straight or curved
A. gunnii
  (2) 1 prominent oblique vein with 2-4 rather obscure veins arising from near the base; heads golden-yellow, 8-15-flowered; legumes spirally coiled
A. pravifolia
38 (1) Phyllodes flat, obliquely ovate-orbicular or obovate, 5-15 mm broad, up to twice as long as broad
A. merrallii
  (2) Phyllodes flat or angular, linear-subulate or linear-lanceolate or narrow-elliptic, 1-5 mm broad, more than twice as long as broad
39
39 (1) Branchlets resinous; phyllodes viscid (at least when young), 1-2.5 cm long
40
  (2) Branchlets not resinous; phyllodes not viscid, 2-6 cm long
41
40 (1) Heads c. 20-flowered, creamy-yellow; phyllodes spreading horizontally, broadest at or near the base, viscid, shining
A. rupicola
  (2) Heads 50-60-flowered, mid-yellow; phyllodes erect or spreading, broadest near the centre, slightly viscid
A. maitlandii
41 (1) Phyllodes pubescent
A. carnei
  (2) Phyllodes glabrous (at least with age)
42
42 (1) Phyllodes usually clustered in groups 2-5, heads c. 50-flowered
A. tetragonophylla
  (2) Phyllodes scattered, not clustered, heads less than c. 20-flowered
43
43 (1) Heads creamy yellow; phyllodes at right angles to branch, apex tapered
A. genistifolia
  (2) Heads golden yellow; phyllodes ascending, apex abruptly pungent
A. mutabilis
44 (1) Unexpanded racemes at first covered with large imbricate (scale-like) bracts
45
  (2) Unexpanded racemes not covered with large imbricate bracts
46
45 (1) Branchlets angular-striate, soon terete, pruinose; flowers c. 12 per head; legumes 6-12 cm long, 7-10 mm broad
A. iteaphylla
  (2) Branchlets acutely angled, triangular appearing flattened, smooth, greenish; flowers c.6-10 per head; legumes 2-4 mm long, 12-20 mm broad
A. suaveolens
46 (1) Phyllodes terete-compressed or quadrangular
47
  (2) Phyllodes distinctly flattened
50
47 (1) Phyllodes 4-13 cm long
48
  (2) Phyllodes more than 13 cm long
A. araneosa
48 (1) Phyllode apex acute, pungent-pointed
A. prainii
  (2) Phyllode apex uncinate or with a short curved mucro, not pungent
49
49 (1) Phyllodes quadrangular; apex with a swollen gland below a short curved mucro
A. pachyacra
  (2) Phyllodes terete-compressed; apex uncinate, without a swollen gland
A. calamifolia
50 (1) Mature phyllodes always covered with short hairs
51
  (2) Mature phyllodes-glabrous
52
51 (1) Hairs short, appressed, silky; peduncle rarely exceeding phyllodes; phyllodes < 11 mm wide
A. argyrophylla
  (2) Hairs dense or scattered, erect; peduncle exceeding phyllodes; phyllodes > 15 mm wide
A. podalyriifolia
52 (1) Flowers 30 or fewer in each head
53
  (2) Flowers more than 30 in each head
64
53 (1) Flowers 4-merous, fewer than 6 in each head
A. myrtifolia
  (2) Flowers 5-merous, more than 6 in each head
54
54 (1) Calyx distinctly lobed (sepals free to the base in A. victoriae)
55
  (2) Calyx almost truncate, indistinctly lobed
62
55 (1) Phyllodes oblanceolate, narrow-obovate
56
  (2) Phyllodes linear, narrow-elliptic to lanceolate (sometimes oblanceolate in A. jennerae)
58
56 (1) Phyllode apex uncinate
A. retinodes var. uncifolia
  (2) Phyllode apex obtuse or acute never uncinate
57
57

(1)

Branchlets prominently angular, longitudinally striate; heads 15-20-flowered, on slender peduncles; funicle encircling the seed
A. wattsiana
  (2) Branchlets slightly angular; heads c. 25-flowered, on stout peduncles; funicle short, not encircling the seed
A. hakeoides
58 (1) Stipules prominent, spiny; seeds almost globular, transverse in the legume
59
  (2) Stipules inconspicuous, never spiny; seed ovoid, longitudinal in the legume
60
59 (1) Branchlets and phyllodes glabrous or almost so
A. victoriae var. victoriae
  (2) Branchlets and phyllodes villous with soft spreading hairs
A. victoriae var. arida
60 (1) Phyllodes straight or slightly curved
61
  (2) Phyllodes falcate
A. leiophylla
61 (1) Phyllodes 2-5 cm long, 1 gland near the base; flowers 8-15 in each head
A. quornensis
  (2) Phyllodes 5-15 cm long, 1-3 glands along the upper margin; flowers 20-30 in each head
A. jennerae
62 (1) Phyllodes thick, green and wrinkled when dry, usually mucronate; legumes hard, woody, constricted between the seeds, easily breaking into 1-seeded segments
63
  (2) Phyllodes greyish, flaccid, not wrinkled when dry, usually pendulous, never mucronate; legumes woody, hardly constricted, not breaking easily into 1-seeded segments, often suckering
A. salicina
63 (1) 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
A. cupularis
  (2) Phyllodes mostly broader, 4-14 mm wide, apex obliquely mucronate to uncinate, legumes 5-9 mm wide, very widespread in S.Aust
A. ligulata
64 (1) Sepals free to the base
A. murrayana
  (2) Sepals united for half or more of their length
65
65 (1) Phyllodes linear-cultrate or narrow-elliptic
66
  (2) Phyllodes narrow- to broad-lanceolate or oblanceolate
67
66 (1) Phyllodes with 2-4 small glands along the upper margin; peduncles thick, less than 10 mm long; seeds compressed, longitudinal
A. beckleri
  (2) Phyllodes with a single conspicuous gland at the base; peduncles slender, 10-38 mm long; seeds almost orbicular, transverse or oblique in the legume
A. pruinocarpa
67 (1) Younger shoots, petiole, axil and pods white pruinose
A. cretacea
  (2) Younger shoots, petiole and axil not conspicuously white pruinose
68
68 (1) Branchlets flattened, acutely angled or ribbed, becoming almost terete when mature
69
  (2) Branchlets slightly angular, soon terete, smooth
71
69 (1) Branchlets and inflorescence rhachis prominently flexuose; phyllodes falcate, spreading or often reflexed
A. gillii
  (2) Branchlets and inflorescence rhachis not or only slightly flexuose; phyllodes straight or slightly curved, spreading not reflexed
70
70 (1) Flowers pale-yellow; legumes almost straight-edged; funicle long, encircling the seed
A. retinodes var. retinodes
  (2) Flowers a bright golden-yellow; legumes slightly constricted between the seeds; funicle short, never encircling the seed (garden escape)
A. saligna
71 (1) Phyllodes 2-5 mm broad, lateral veins fine, rather obscure or absent
72
  (2) Phyllodes more than 5 mm broad, lateral veins numerous, conspicuous
73
72 (1) Phyllodes broadest just above the centre but tapering at both ends, a small gland 15 mm or more from the base; peduncles hoary
A. rivalis
  (2) Phyllodes broadest well above the centre, tapering gradually to the base, a small gland 5-10 mm from the base; peduncles glabrous
A. calamifolia
73 (1) Phyllodes with conspicuous raised anastomosing lateral veins
A. validinervia
  (2) Phyllodes with fine sunken reticulate or anastomosing lateral veins
74
74 (1) Seeds transverse in the legume, funicle encircling the seed
75
  (2) Seeds longitudinal in the legume; funicle short or, if long, then encircling the seed
76
75 (1) Phyllodes rigid, coriaceous, + straight margin usually prominent apex often blunt
A. notabilis
  (2) Phyllodes flexible, often falcate, margin not prominent, apex mostly acute, more or less hooked
A. alcockii
76 (1) Phyllode apices obviously acuminate, surfaces often scurfy; legume thick, coriaceous, 10-25 mm long, 10-15 mm broad; seed broadly ovoid
A. confluens
  (2) Phyllode apices obtuse or acute; legumes firmly chartaceous, 5-12 cm long, 5-7 mm broad, seeds ovoid-oblong
77
77 (1) Phyllodes tapering prominently towards the base; funicle short, not encircling the seed
A. pycnantha
  (2) Phyllodes tapering gradually to both ends, narrow-elliptic to oblanceolate; funicle long, more or less encircling the seed
A. cretacea
78 (1) Flower heads sessile or on very short pubescent peduncles up to 3 mm 1ong; phyllodes flat, pungent-pointed
A. oswaldii
  (2) Flower heads distinctly pedunculate, more than 3 mm long
79
79 (1) Phyllode apex distinctly pungent-pointed
80
  (2) Phyllode apex innocuous
84
80 (1) Phyllodes broadly triangular, flat, 4-12 mm long, upper margin humped
A. pravifolia
  (2) Phyllodes linear, terete-compressed
81
81 (1) Branches and phyllodes asperulate
A. enterocarpa
  (2) Branches and phyllodes not asperulate
82
82 (1) Phyllodes c. 16-veined, veins obscure, fine and close together
A. nyssophylla
  (2) Phyllodes 6-8-veined, veins prominent well spaced
83
83 (1) Phyllodes 6-veined, small stipular prickles usually present
A. hexaneura
  (2) Phyllodes 8-veined, stipular prickles absent
A. colletioides
84 (1) Branches and phyllodes resinous, viscid
85
  (2) Branchlets and phyllodes not resinous (or only slightly viscid on young branchlets or immature phyllodes)
93
85 (1) Phyllodes more than 2 mm broad, flat, and with 2 (rarely 3) prominent longitudinal veins
86
  (2) Phyllodes less than 2 mm broad, flattened to terete (flattened phyllodes with 3 (rarely 2) prominent longitudinal veins)
89
86 (1) Phyllodes with obvious secondary anastomosing veins
87
  (2) Phyllodes without secondary veins (or if present then rather obscure never anastomosing)
88
87 (1) 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
A. montana
  (2) 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
A. dictyophleba
88 (1) Phyllodes 4-12 cm long, punctate, linear-lanceolate, apex acute, with 2 parallel veins only
A. verniciflua
  (2) Phyllodes 1-2.5 cm long, oblong, cuneate, not punctate, with a short oblique mucro, 2 prominent veins with 1-3 fainter parallel veins
A. wilhelmiana
89 (1) Phyllodes narrow-linear, flattened, never terete; apex uncinate; flowers 4-merous
A. barattensis
  (2) Phyllodes filiform, terete or compressed, apex with a small oblique mucro, or obtuse with scarcely any point
90
90 (1) Phyllodes 5-10 cm long
A. gracilifolia
  (2) Phyllodes 1-3.5 cm long
91
91 (1) Peduncles golden-pubescent
A. wilhelmiana
  (2) Peduncles glabrous, viscid
92
92 (1) Phyllodes straight or slightly curved, with 5 or 6 longitudinal veins
A. menzelii
  (2) Phyllodes curved and shallowly sigmoid, 2-veined
A. helmsiana
93 (1) Branchlets spinescent
A. basedowii
  (2) Branchlets not spinescent
94
94 (1) Phyllodes distinctly flattened, with 2-7 more or less prominent veins pre-sent on each face separated by distinct interstices
95
  (2) Phyllodes flat, terete or subterete, with numerous fine, closely placed veins often only visible under a lens
100
95 (1) Phyllodes with 2 prominent veins, more or less elliptic, 4-12 mm long
A. glandulicarpa
  (2) Phyllodes with 3-7 more or less prominent veins, linear-lanceolate, oblanceolate or narrowly obovate, 1-10 cm long
96
96 (1) Phyllodes often more than 4 mm wide, hoary, often sub-falcate
97
  (2) Phyllodes rarely 4 mm wide, green
98
97 (1) Pod more or less straight, 8-12 mm wide, seeds longitudinal
A. cambagei
  (2) Pod twisted and coiled, 12-25 .mm wide, seeds transverse
A. georginae
98 (1) 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
A. estrophiolata
  (2) 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 (1) Branchlets and peduncles glabrous or slightly hairy
A. sclerophylla var. sclerophylla
  (2) Branchlets and peduncles hoary
A. farinosa
100 (1) Phyllodes 1-3.5 cm long, glabrous
101
  (2) Phyllodes more than 3.5 cm long, pubescent to some degree
103
101 (1) Phyllodes fleshy, grooved and wrinkled when dry
A. pinguifolia
  (2) Phyllodes not fleshy, smooth or only lightly grooved when dry
102
102 (1) Resin hairs sparse to abundant on young growth, phyllode apex mostly blunt, peduncles 2-4 mm
A. sclerophylla var. lissophylla
  (2) Resin hairs lacking, branchlets and peduncles glabrous, phyllodes usually with short, acute, oblique apex, peduncles 6-11 mm
A. whibleyana
103 (1) Phyllode apex obtuse or with a short rather hard but innocuous point, scarcely tapering-towards the base
104
  (2) Phyllode apex attenuate, delicately curved, not pungent except in A. sp. aff. papyrocarpa, more or less coarsely pungent
105
104 (1) Phyllodes brittle, snapping easily; veins all fine, obscure; branches smooth, almost terete
A. havilandii
  (2) Phyllodes tough, not snapping easily; veins yellowish, some more prominent than others; branches slightly angular, with yellowish ribs
A. rigens
105 (1) Legumes scarcely constricted between the seeds, reticulate, 5-8 mm broad
A. papyrocarpa
  (2) Legumes moniliform, not reticulate, c. 4 mm broad
A. loderi
106 (1) Phyllodes terete or quadrangular
107
  (2) Phyllodes distinctly flattened
108
107 (1) Phyllodes terete with 7 or 8 fine longitudinal veins, apex coarsely pungent
A. gilesiana
  (2) Phyllodes quadrangular with a prominent vein at each angle, apex thickened glandular
A. pachyacra
108 (1) Phyllodes prominently 3-5-veined on each face with fine reticulate lateral veins between them
109
  (2) Phyllodes with numerous closely approximating very fine longitudinal veins (1-3 sometimes more prominent than the rest)
111
109 (1) Phyllodes elliptic, lanceolate, 7-30 mm broad (usually more than 12 mm broad), with many obvious reticulate lateral veins
A. melanoxylon
  (2) Phyllodes narrowly obovate, oblong or lanceolate, up to 12 mm broad, with a few rather obscure lateral veins
110
110 (1) Branchlets and peduncles hoary; phyllodes 4-6 mm broad; funicle short, folded under the seed, not encircling the seed
A. trineura
  (2) Branchlets and peduncles glabrous; phyllodes 6-12 mm broad; funicle a bright yellowish-orange, encircling the seed in a double fold
A. cyclops
111 (1) Phyllodes hoary or densely covered with fine appressed silvery hairs
112
  (2) Phyllodes glabrous or sparsely pubescent (often scurfy in A. cambagei)
113
112 (1) Mature phyllodes less than 15 cm long; heads 30-40-flowered; sepals free; legumes to 12 cm long, straight or curved
A. calcicola
  (2) Mature phyllodes usually more than 15 cm long; heads less than 30-flowered; sepals united; legumes 15 cm or more long, twisted
A. coriacea
113 (1) Mature phyllodes less than 15 cm long, lanceolate; veins numerous, fine, closely placed, 1-3 more prominent than the rest
114
  (2) Mature phyllodes more than 15 cm long, linear; veins numerous, prominent, with interstices
A. stenophylla
114 (1) Pods more or less straight. 8-12 mm wide; seeds longitudinal
A. cambagei
  (2) Pods twisted and coiled, 12-25 mm wide; seeds transverse
A. georginae
115 (1) Phyllodes pungent-pointed
116
  (2) Phyllodes not pungent-pointed
119
116 (1) Phyllodes mostly whorled, 1-veined
A. verticillata
  (2) Phyllodes never whorled, scattered, more than l-veined
117
117 (1) Phyllodes terete, 8-20 cm long; veins fine and numerous
A. cyperophylla
  (2) Phyllodes flattened, 1-4 cm long, veins 3 or 4 and prominent
118
118 (1) Phyllodes 1-2.5 cm long, c. 2 mm broad, with 3 prominent veins, flower spikes sub-sessile; flowers loosely arranged
A. rhigiophylla
  (2) Phyllodes 2-4 cm long, 2-5 mm broad, with 3 or 4 prominent veins; flower spikes distinctly pedunculate; flowers dense
A. oxycedrus
119 (1) Phyllodes distinctly flattened
120
  (2) Phyllodes terete or sub-terete
131
120 (1) Phyllodes more or less flaccid; seeds longitudinally placed in the legume
121
  (2) Phyllodes thickened, coriaceous, rigid
125
121 (1) Phyllodes 8-33 mm broad
122
  (2) Phyllodes less than 8 mm broad, lacking intervening reticulate veins
124
122 (1) Phyllodes falcate, silvery, with 3 principal lateral veins
A. cowleana
  (2) Phyllodes more or less straight, green, with five less prominent lateral veins
123
123 (1) Phyllodes linear-lanceolate or narrow-elliptic, 6-15 cm long, 8-15 mm broad, usually more than 10 cm long
A. longifolia var. longifolia
  (2) Phyllodes obovate-oblong, 5-9 cm long, 12-35 mm broad, thicker and much more obtuse than the preceding variety
A. longifolia var. sophorae
124 (1) Phyllodes 3-7 mm broad, with many rather obscure, closely approximating, longitudinal veins; receptacles golden-pubescent
A. olgana
  (2) Phyllodes 1-3 mm broad, usually with 3 prominent and distant veins (some-times to 5 on broad phyllodes); receptacles glabrous
A. symonii
125 (1) Bark red, shedding in narrow curly strips, seeds longitudinal in legumes
A. rhodophloia
  (2) Bark grey, not shedding as above, seeds transverse or oblique
126
126 (1) Phyllodes 2-4 (-5) mm wide, linear to very narrow elliptic
127
  (2) Phyllodes 4-20 mm wide, oblong to elliptic to falcate
128
127 (1) Phyllodes narrow oblanceolate to oblong, often curved, apex more or less symmetrical, yellow-green
A. stowardii
  (2) Phyllodes terete to narrow linear, apex often slightly hooked, grey-green
A. aneura
128 (1) Phyllodes mostly 1-2.5 cm long, most plants with dense opaque resin
A. minyura
  (2) Phyllodes mostly longer, some with resinous margins
129
129 (1) Phyllode margins thick, crenulate, resinous young phyllodes silvery pubescent
A. tarculensis
  (2) Phyllode margins not as above
130
130 (1) Phyllodes oblong-lanceolate, glabrous
A. kempeana
  (2) Phyllodes elliptic-falcate, densely simply hairy
A. ayersiana
131 (1) Phyllodes ciliolate along the margins on the upper half to the finely non-pungent tip; spikes sessile; flowers 4-merous
A. burkittii
  (2) Phyllodes not ciliolate along margins, apex with short callous point or mucro, spikes pedunculate; flowers 5-merous
132
132 (1) 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
A. gracilifolia
  (2) 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 (1) Legume woody, cylindrical, hoary, marked with brown resinous parallel veins, 7-10 cm long
A. ramulosa
  (2) Legume not as above.
134
134 (1) Legume linear 5-6 cm long 2-2.5 mm wide, curved and twisted at maturity, flower spike rarely greater than 1 cm long
A. tenuissima
  (2) 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 (1) Legumes flat, narrowly winged, seeds transverse to oblique
A. aneura
  (2) Legumes flattish but turgid and biconvex, not winged, seeds longitudinal
A. cibaria
136 (1) Inflorescence simple, solitary or 2-5 together
137
  (2) Inflorescence racemose or paniculate
141
137 (1) Axillary spines absent
138
  (2) Axillary spines present
139
138 (1) Flowering peduncle with bract at midpoint; pod deeply constricted, hoary pubescent
A. nilotica
  (2) Flowering peduncle without bract; pod scarcely constricted, glabrous
A. mitchellii
139 (1) Pinnules 10-21 pairs; pods swollen, turgid
A. farnesiana
  (2) Pinnules 1-5 pairs; pods flat
140
140 (1) Pinnules 1-2 pairs; flowering peduncle without bracts at midpoint; pod to 5 cm, glabrous
A. pulchella
  (2) Pinnules 1-5 pairs; flowering peduncle with bract about midpoint; pod 6-20 cm long, constricted between seeds, hoary tomentose
A. nilotica
141 (1) Branchlets prominently angled with wing-like ridges almost glabrous; foliage dark-green; pinnules well separated
A. decurrens
  (2) Branchlets angled or striate but not winged, more or less densely pubescent, pruinose, foliage greyish-green, glaucous, bluish or silvery; pinnules crowded
142
142 (1) Leaves with 2-6 pinna pairs, bluish-glaucous
A. baileyana
  (2) Leaves with 10-26 pinna pairs, greyish-green, glaucous or silvery
143
143 (1) Leaf rhachis with a gland at the junction of each pinna pair and with additional glands between the pinna pairs
A. mearnsii
  (2) Leaf rhachis with a gland at the junction of each pinna pair, no additional glands between
A. dealbata

 

 
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Date last modified: 2009-08-18

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State Herbarium of South Australia

Government of South Australia Government of South Australia Department of Environment, Water and Natural Resources