1 (1) |
Mature leaves reduced to phyllodes or not developed at all |
Goto 2 |
(2) |
Leaves all bipinnate |
38 |
2 (1) |
Phyllodes either absent (occasional twigs.rarely with a few articulate phyllodes), or continuous with the branches |
3 |
(2) |
Phyllodes present and articulate on the branches |
4 |
3 (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 |
4 (1) |
Phyllodes innocuous. |
5 |
(2) |
Phyllodes pungent-pointed. |
28 |
5 (1) |
Phyllodes to 2 cm long. |
6 |
(2) |
Phyllodes 2-12 cm long. |
16 |
6 (1) |
Branchlets spinescent. |
7 |
(2) |
Branchlets not spinescent. |
8 |
7 (1) |
Branchlets hairy; phyllodes n .arrow-cuneate, humped at the summit |
A. acanthoclada |
(2) |
Branchlets glabrous; phyllodes broadly lanceolate, never humped |
A. erinacea |
8 (1) |
Stipules prominent and spiny |
A. paradoxa |
(2) |
Stipules when present minute and not spiny. |
9 |
9 (1) |
Shrubs prominently resinous; phyllodes viscid. |
10 |
(2) |
Shrubs not or sometimes very slightly resinous; phyllodes not viscid, 5-20 mm long. |
11 |
10 (1) |
Phyllodes fiat, obliquely obovate, 2-5 mm long |
A. rhetinocarpa |
(2) |
Phyllodes terete-compressed, 1-2 cm long |
A. helmsiana |
11 (1) |
Phyllodes ovate-oblanceolate to obovate-orbicular. |
12 |
(2) |
Phyllodes linear or oblong. |
14 |
12 (1) |
Phyllodes grey-green, heads 20-30 flowered. |
13 |
(2) |
Phyllodes mid-green; heads 10-15-flowered; peduncles often longer than phyllodes; legumes spirally coiled |
A. acinacea |
13 (1) |
Peduncles mostly longer than phyllodes, heads 8-10 mm diam |
A. spilleriana |
(2) |
Peduncles mostly shorter than phyllodes, heads about 5 mm diam |
A. brachybotrya |
14 (1) |
Branchlets pubescent, almost terete; phyllodes with the vein ~ close to the lower margin |
A. lineata |
(2) |
Branchlets glabrous, angular. |
15 |
15 (1) |
Phyllodes erect, imbricate; apex almost truncate except for an oblique mucro |
A. imbricata |
(2) |
Phyllodes spreading-erect, not imbricate, apex obtuse |
A. triquetra |
16 (1) |
Branchlets acutely angular, often compressed and winged. |
17 |
(2) |
Branchlets angular or striate, becoming almost terete, never flattened or winged. |
19 |
17 (1) |
Phyllodes with obviously reticulate lateral veins; peduncles stout, solitary; heads c. 40-flowered; seeds transversely placed in the legume. |
18 |
(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 |
18 (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 |
19 (1) |
Branchlets and phyllodes pubescent or becoming glabrous when mature. |
20 |
(2) |
Branchlets and phyllodes glabrous (young phyllodes minutely pubescent in A. microcarpa). |
22 |
20 (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. |
21 |
21 (1) |
Peduncle mostly shorter than phyllode, heads about 5 mm diam |
A. brachybotrya |
(2) |
Peduncles mostly longer than leaf, heads 8-10 mm diam |
A. spilleriana |
22 (1) |
Phyllodes terete or if flattened then not exceeding 5 mm broad; apex always uncinate. |
23 |
(2) |
Phyllodes distinctly flattened, 5-15 mm broad; apex sometimes mucronate, never distinctly uncinate. |
25 |
23 (1) |
Apex always acute or acuminate. |
24 |
(2) |
Apex always blunt with two glands at summit, phyllodes often slightly upcurved |
A. praemorsa |
24 (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 |
25 (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. |
26 |
26 (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. |
27 |
27 (1) |
Phyllode apex obtuse, phyllodes straight or with slight upward cur~e, young tips + glabrous |
A. microcarpa |
(2) |
Phyllode apex acute, phyllodes slightly recurved, young tips densely pubescent (later glabrous) |
A. halliana |
28 (1) |
Stipules prominent and spiny. |
29 |
(2) |
Stipules when present small and not spiny. |
30 |
29 (1) |
Phyllodes flat, glabrous, rhomboid-orbicular, 1-2 cm long |
A. strongylophylla |
(2) |
Phyllodes terete, minutely pubescent, 3-6 cm long |
A. pickardii |
30 (1) |
Phyllodes humped on the upper margin. |
31 |
(2) |
Phyllodes not humped on the upper margin. |
32 |
31 (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 |
32 (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. |
33 |
33 (1) |
Branchlets resinous; phyllodes viscid (at least when young), 1-2.5 cm long. |
34 |
(2) |
Branchlets not resinous; phyllodes not viscid, 2-6 cm long. |
35 |
34 (1) |
Heads c. 20-flowered, creamy-yellow; phyllodes spreading horizontally, broadest at or near the base, viscid |
A. rupicola |
(2) |
Heads 50-60-flowered, mid-yellow; phyllodes erect or spreading, broadest near the centre, slightly viscid |
A. maitlandii |
35 (1) |
Phyllodes pubescent |
A. carnei |
(2) |
Phyllodes glabrous (at least with age). |
36 |
36 (1) |
Phyllodes usually clustered in groups 2-5, heads c. 50flowered |
A. tetragonophylla |
(2) |
Phyllodes scattered, not clustered, heads less than c. 20 flowered. |
37 |
37 (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 |
38 (1) |
Inflorescences simple, solitary or 2-3 together |
39 |
(2) |
Inflorescence racemose or paniculate |
40 |
39 (1) |
Stipules prominent, spiny; pinnules 10-21 pairs |
A. farnesiana |
(2) |
Stipules minute, not spiny, pinnules 2-7 pairs |
A. mitchellii |
40 (1) |
Branches prominently angled with wing-like ridges |
A. decurrens |
(2) |
Branches angled or striate but not winged |
41 |
41 (1) |
Leaves with 2-6 pairs of pinnae |
A. baileyana |
(2) |
Leaves with 10-26 pairs of pinnae |
42 |
42 (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, without additional glands between |
A. dealbata |