1	"Capitula of 2 types (each unisexual); plants usually dioecious, rarely monoecious"	Baccharis
1	"Capitula of one type"	2
2	"Rays (when obvious) usually yellow or white; achenes often terete to fusiform"	3
2	"Rays elongate and bluish to purplish or white, or rays reduced or lacking; achenes usually ±compressed"	8
3	"Involucral bracts thickened or keeled; style appendages of fertile disc flowers hairy"	4
3	"Involucral bracts flattened, not keeled; style appendages of fertile disc flowers papillose, rarely hairy"	5
4	"Pappus of 2–10 caducous uncoloured awns"	Grindelia
4	"Pappus biseriate, brick-red to rust-coloured, outer series inconspicous, inner series long, barbellate"	"Heterotheca {Heterotheca grandiflora}"
5	"Pappus 1-seriate; leaves subglabrous"	Solidago
5	"Pappus (1) 2 (3) -seriate; leaves often tomentose abaxially"	6
6	"Receptacle paleate"	"Achnophora {Achnophora tatei}"
6	"Receptacle epaleate"	7
7	"Perennial rosulate herbs"	Celmisia
7	"Shrubs or trees"	Olearia
8	"Involucral bracts with orange-resinous ribs or veins"	Erigeron
8	"Involucral bracts without prominent resinous veins"	9
9	"Ray florets, when present, (1–) 2–4-seriate (ray florets absent in Pilbara)"	10
9	"Ray florets 1-seriate"	29
10	"Pappus of bristles in (1–) 2–3 series; limbs of ray florets sometimes elongate & coiling"	11
10	"Pappus reduced or lacking, rarely a single series of bristles; ray florets with limbs short or lacking"	24
11	"Achenes with a short neck or long beak"	12
11	"Achenes apical rounded or truncate, no beak or neck"	15
12	"Achenes with a long filiform beak"	Ixiochlamys
12	"Achenes with a short neck"	13
13	"Achenes with a narrowed basal extension, densely tufted with stiff hairs"	Vittadinia
13	"Achenes without basal extension, hairs uniform"	14
14	"Achenes c. 2 mm long; pappus bristles 2-seriate"	"Dichromochlamys {Dichromochlamys dentatifolia}"
14	"Achenes c. 1 mm long; pappus bristles 1-seriate"	Iotasperma
15	"Achenes usually with 2-many facial nerves between the 2 lateral nerves"	16
15	"Achenes with only 2 lateral nerves"	18
16	"Achenes with a narrowed basal extension, densely tufted with stiff hairs"	Vittadinia
16	"Achenes without basal extension, hairs uniform"	17
17	"Disc floret ovaries fertile; perennial herbs with woody rootstock"	Camptacra
17	"Disc floret ovaries sterile; shrubs or subshrubs"	Tetramolopium
18	"Achenes with a narrowed basal extension, densely tufted with stiff hairs"	Vittadinia
18	"Achenes without basal extension, hairs uniform"	19
19	"Disc floret ovaries fertile; pappus of ray & disc florets similar"	20
19	"Disc floret ovaries sterile; pappus of ray & disc florets different"	21
20	"Ray floret corollas yellow; disc corollas 4-lobed"	"Kippistia {Kippistia suaedifolia}"
20	"Ray floret corollas white to bluish; disc corollas 5-lobed"	Vittadinia
21	"Disc floret corollas 5-lobed; pappus of ray achenes of bristles"	Minuria
21	"Disc floret corollas 3- or 4-lobed; pappus of ray achenes of scales or scales & bristles"	22
22	"Leaves oblanceolate; ray achene pappus of scales & bristles"	"Dimorphocoma {Dimorphocoma minutula}"
22	"Leaves linear; ray achene pappus of scales"	23
23	"Erect or decumbent herbs with solitary terminal heads; leaves cauline"	Elachanthus
23	"Sessile herbs with heads clustered among bases of clustered rosette leaves"	"Isoetopsis {Isoetopsis graminifolia}"
24	"Achenes not beaked; achene hairs often anchor-tipped; receptacles often conical or cyathiform"	25
24	"Achenes often beaked; achene hairs not anchor-tipped; receptacles usually convex or flat"	27
25	"Receptacle epaleate"	"Dichrocephala {Dichrocephala integrifolia}"
25	"Receptacle paleate"	26
26	"Perennial herbs; leaves pinnatisect"	Erodiophyllum
26	"Shrubs; leaves entire"	"Pilbara {Pilbara trudgenii}"
27	"Pappus of 6–20 short barbellate bristles"	Pappachroma
27	"Pappus none or with distorted caducous bristles"	28
28	"Heads radiate; limb of ray florets obvious"	Lagenophora
28	"Heads disciform; limb of ray florets rudimentary or absent"	Solenogyne
29	"Pappus reduced or lacking"	30
29	"Pappus usually of capillary bristles"	36
30	"Plants rosulate with heads solitary on individual scapes; limbs of ray florets not coiling; achene hairs simple"	"Bellis {Bellis perennis}"
30	"Plants not rosulate with heads on individual scapes; limbs of ray florets coiling or short; achene hairs (if present) with anchor-shaped tips"	31
31	"Achenes distally Y- or T-shaped with widely spreading arms; with wings involute on one side; pappus lacking"	"Ceratogyne {Ceratogyne obionoides}"
31	"Achenes without distal arms or projections; pappus usually present"	32
32	"Disc florets mostly bisexual"	33
32	"Disc florets usually functionally staminate"	35
33	"Leaves with long coarse septate brown hairs at base"	Allittia
33	"Leaves lacking long coarse septate brown hairs at base"	34
34	"Achene large flattened glabrous with multiple vascular strands in pericarp"	"Pembertonia {Pembertonia latisquamea}"
34	"Achenes without the above combination of characters"	Brachyscome
35	"Pappus of pericarpic subulate to spreading appendages, often retrorsely barbed; true pappus sometimes of plumose bristles, or scales, or absent"	Calotis
35	"Pericarpic appendages absent; pappus absent"	"Hullsia {Hullsia argillicola}"
36	"Involucral bracts mostly herbaceous throughout; receptacles epaleate"	Aster
36	"Involucral bracts usually with broad hyaline margins; receptacles often paleate"	Felicia