1	"Style uncinate (i.e. hooked)."	2
1	"Style straight or curved but not uncinate [occasionally bent just below apex due to damage or  wilting; check several flowers to be sure]."	5
2	"Bracteoles persistent at anthesis and usually to late flower or to the fruiting stage, 4.5–7 mm long.   Hypanthium not ribbed, with 10 foveolae. (Carnamah area to Bruce Rock.)"	"Chamelaucium brevifolium"
2	"Bracteoles caducous or deciduous, mostly shed by anthesis, 1.5–3.5 mm long. Hypanthium ribbed;  foveolae absent or sometimes present."	3
3	"Petals yellow.  Ovules 4.Style with a tuft of hairs on one side of the stigma.  (Warriedar  area.)"	"Chamelaucium sp. Warriedar (A.P.Brown & S.Patrick APB 1100)"
3	"Petals white.  Ovules 6–9.Style with a circle of hairs surrounding the stigma."	4
4	"Leaf apex minutely bifid, obtuse or truncate.  Petals entire.  Sepals denticulate. (Dandaragon area.)"	"Chamelaucium sp. Cataby (G.J.Keighery 11009)"
4	"Leaf apex acute or with an apical point up to 0.3 mm long.  Petals denticulate to ciliate. Sepals ciliate. (Winter-wet sites in Busselton area.)"	"Chamelaucium sp. C Coastal Plain (R.D.Royce 4872)"
5	"Bracteoles persistent at anthesis and usually to late flower or to the fruiting stage."	6
5	"Bracteoles caducous or deciduous, mostly shed by anthesis."	11
6	"Stigma glabrous.  (Carnamah-Latham area.)"	"Chamelaucium sp. Bunjil (M.E.Ballingall 1970)"
6	"Stigma with a circle of substigmatic hairs [note that the hairs may be hidden by an oily pollen  globule on young styles]."	7
7	"Ovules 4.  (Sepals 0.5–1.5 mm long.)"	8
7	"Ovules 5–8."	9
8	"Petioles 2–3 mm long.  Blades 15–30 mm long.  Hypanthium with 10 foveolae.  Sepals  ± entire. Stigma capitate, c. 0.2 mm diam. (not including the hairs).  (Mukinbudin area.)"	"Chamelaucium sp. Mukinbudin (M.Squire 007)"
8	"Petioles 0–0.4 mm long.  Blades 3–8 mm long.  Hypanthium without foveolae.  Sepals  ciliate to fimbriate.  Stigma peltate, c. 0.5 mm diam. (not including the hairs).  (Mingenew  area.)"	"Chamelaucium sp. Mingenew (A.Carr 115)"
9	"Leaves uncinate.  Sepals 0.5–1.3 mm long, entire.  Stigma peltate, 0.4–0.6 mm diam. (not including hairs).  (Kalbarri area to Perth area.)"	"Chamelaucium uncinatum"
9	"Leaves not uncinate.  Sepals 2–3 mm long, denticulate or ciliolate.  Stigma capitate, 0.2–0.3  mm diam. (not including hairs)."	10
10	"Petioles well defined.  Blades 1.5–2.5 mm long.  Hypanthium with 10 foveolae. (East of Esperance.)"	"Chamelaucium sp. Mt Heywood (K.Newbey 7954)"
10	"Petioles poorly defined.  Blades 10–30 mm long.  Hypanthium without foveolae. (Narembeen area to Ravensthorpe.)"	"Chamelaucium virgatum"
11	"Leaves alternate."	12
11	"Leaves opposite."	13
12	"Leaves terete, 0.2–0.4 mm diam.  Hypanthium with 10 foveolae.  Sepals 0.6–1 mm long, entire.  Ovules 4.  (Carnamah area to Wyalkatchem.)"	"Chamelaucium sp. Victoria (J.Coleby-Williams 99)"
12	"Leaves with distinct adaxial and abaxial surfaces, 0.5–1.9 mm wide.  Hypanthium without  foveolae.  Sepals 1.2–3 mm long, ciliate or fimbriate.  Ovules 5 or 6.  (North of Geraldton to central wheatbelt.)"	"Chamelaucium drummondii"
13	"Style 12–25 mm long at maturity."	14
13	"Style 1–10 mm long at maturity."	16
14	"Bracteoles umbo (dorsal point) absent or up to 0.1 mm long.  Petals white, pink or red at anthesis.  Stigma with a belt of substigmatic hairs.  (Koolyanobbing area.)"	"Chamelaucium sp. Koolyanobbing (V.Clarke 644)"
14	"Bracteoles umbo (dorsal point) 0.4–1.5 mm long.  Petals red at anthesis.  Stigma with  a circle of substigmatic hairs."	15
15	"Prostrate shrub.  Petals 3–4 mm long, entire.  Style 12–18 mm long; stigma capitate, 0.15–0.2 mm diam.  (Canna area.)"	"Chamelaucium sp. Canna (G.J.Keighery s.n. PERTH 02236435)"
15	"Erect shrub.  Petals 4.5–6.5 mm long, ciliate.  Style 17–25 mm long; stigma ± peltate, 0.35–0.4 mm diam.  (Bunbury-Margaret River area.)"	"Chamelaucium sp. Yoongarillup (G.J.Keighery 3635)"
16	"Style glabrous and smooth or with a belt of hair-like papillae."	17
16	"Style with substigmatic hairs that may be acute, obtuse or clubbed."	19
17	"Shrub prostrate, layering.  Petals red at anthesis.  Style 2.5–3.5 mm long, with  prominent, distally compressed, hair-like papillae in a belt c. 0.4 mm long. (Carnamah area to Cunderdin.)"	"Chamelaucium sp. Wongan Hills (B.H.Smith 1140)"
17	"Shrub erect or spreading, not layering.  Petals white at anthesis.  Style glabrous, without a belt of papillae"	18
18	"Sepals ciliate or fimbriate.   Ovules 4–6.  (Wongan Hills area to goldfields, Albany and Israelite Bay.)"	"Chamelaucium ciliatum"
18	"Sepals entire or denticulate.  Ovules 6–8.  (Meekatharra area to Geraldton to central  wheatbelt.)"	"Chamelaucium micranthum"
19	"Leaves with an apical point (0.1–)0.2–0.8 mm long or tapering at the apex."	20
19	"Leaves with 2 minute lateral points or with no point or with a mucro up to 0.1 mm long."	28
20	"Staminodes enlarged and somewhat cupped or branched at the apex.  Occurring along  the south coast."	21
20	"Staminodes not enlarged or branched at the apex.  Occurring along the west coast and  inland to the central wheatbelt."	23
21	"Sepals 0.8–1.3 mm long.  Staminodes distinctly exceeding the stamens, the free  part c. twice as long as free part of antipetalous filaments.  (Fitzgerald River National Park area.)"	"Chamelaucium sp. Mt Maxwell (R.Davis RD 524)"
21	"Sepals 1.5–3 mm long.  Staminodes similar in length to or shorter than the antipetalous  filaments."	22
22	"Leaves 0.7–1.2(–1.5) mm thick.  Peduncles 3.5–13 mm long.  (Fitzgerald River  National Park to Israelite Bay.)"	"Chamelaucium axillare"
22	"Leaves 0.5–2 mm thick.  Peduncles 1.5–3.5 mm long.  (Toolinna area.)"	"Chamelaucium axillare"
23	"Leaves with a whitish mucro 0.1–0.3 mm long.  Sepals 2–3 mm long, ciliolate.  (Gingin area.)"	"Chamelaucium sp. Gingin (N.G.Marchant 6)"
23	"Leaves with an apical point 0.2–0.8 mm long.  Sepals 0.5–1.3 mm long, entire or minutely  denticulate."	24
24	"Petals yellow or yellow-green.  Substigmatic hairs in a thick, dense circle, distally compressed. (Kalbarri area.)"	"Chamelaucium marchantii"
24	"Petals white, pink or red.  Substigmatic hairs in a thin circle, distally acute or clubbed."	25
25	"Staminodes about as long as the antipetalous filaments.  Ovules 4.  (Parker Range area.)"	"Chamelaucium sp. Parker Range (B.H.Smith 1255)"
25	"Staminodes shorter than the antipetalous filaments.  Ovules 6–10."	26
26	"Petals 3.5–7.5 mm long.  Staminodes not much shorter than the antipetalous  filaments.  Stigma peltate, 0.4–0.6 mm diam. (not including hairs).   (Kalbarri area to Perth area.)"	"Chamelaucium uncinatum"
26	"Petals 1.5–3.5 mm long. Staminodes usually much shorter than the antipetalous  filaments, if not then occurring south of Perth.  Stigma capitate, 0.2–0.25 mm diam.  (not including hairs)."	27
27	"Largest leaves 10–30 mm long, not uncinate.  Bracteoles 4–6.5 mm long,  including an umbo (dorsal point) 1.4–1.8 mm long.  Petals red or white.  Style 3–5 mm long; substigmatic hairs 0.3–0.7 mm long.  (Shark Bay-Geraldton area.)"	"Chamelaucium sp. Coolcalalya (A.H.Burbidge 4233)"
27	"Largest leaves 4–16 mm long, uncinate.  Bracteoles 2–4 mm long, including  an umbo (dorsal point) 0.1–0.5 mm long.  Petals white.  Style 2.5–3 mm long; substigmatic hairs 0.1–0.25 mm long.  (Carnamah area to Narrogin area.)"	"Chamelaucium sp. Winchester (C.Chapman s.n. PERTH 07879180)"
28	"Leaves bilaterally compressed, the adaxial surface deeply grooved (groove v-shaped   in section); apex laterally 2-toothed or 2-pointed.  Stigma peltate, 0.3–0.7 mm diam.   Occurring near the south coast."	29
28	"Leaves either as wide or wider than thick or without a deep adaxial groove; apex varied, sometimes with a minute mucro.  Stigma capitate, 0.1–0.3 mm diam.  Widespread in  south-western Australia."	33
29	"Ultimate branchlets pendulous.  Hypathium not ribbed; foveolae absent.  Stigma markedly peltate, 0.5–0.7 mm diam.  (Manypeaks-Waychinicup area.)"	"Chamelaucium sp. Waychinicup (D.Davidson s.n. PERTH 01486527)"
29	"Branchlets erect or spreading (but peduncles pendulous in one species).  Hypanthium  10-ribbed; foveolae 10.Stigma peltate, 0.3–0.55 mm diam."	30
30	"Peduncles recurved at maturity.  Flowers pendulous, 3–4 mm diam.  Ovules 4–8. Style 4.5–6.5 mm long. (Manjumup-Walpole area.)"	"Chamelaucium sp. Mt Frankland (A.S.George 11117)"
30	"Peduncles straight or curved.  Flowers erect or spreading, 7–10 mm diam. (when fully open).  Ovules 7–10.Style 2–4 mm long."	31
31	"Leaves 1–1.3 mm thick.  Peduncles 3–5 mm long.  Bracteoles umbo (dorsal point) 1.5–2.5 mm long (Cape Vancouver area.)"	"Chamelaucium sp. Cape Vancouver (B.Swainson & D.Davidson s.n. PERTH 01259660)"
31	"Leaves 0.5–1 mm thick.  Peduncles 4–12 mm long.  Bracteoles umbo (dorsal point) 0.2–1.3 mm long."	32
32	"Compact shrub of coastal sanddunes.  Leaves 8–15 mm long.  Peduncles 4–7  mm long.  Hypanthium clearly 10-ribbed.  Petals white to bright pink (Northcliffe-Nornalup area.)"	"Chamelaucium sp. Walpole (P.G.Wilson 6318)"
32	"Diffuse shrub of more inland areas, often associated with granite rocks. Leaves 12–23  mm long.  Peduncles (4–)6–12 mm long.  Hypanthium tending to be less obviously 10-ribbed.  Petals white.  (Walpole area.)"	"Chamelaucium sp. Nornalup (N.G.Marchant 76/125)"
33	"Substigmatic hairs in a shortly or very shortly cylindrical belt 0.3–1 mm long.   Bracteoles 5–10 mm long.  Style 4.5–9 mm long at maturity."	34
33	"Substigmatic hairs in a ‘circle’ less than 0.3 mm long.  Bracteoles 2.5–6 mm long.   Style 3–6 mm long at maturity."	36
34	"Substigmatic hairs in a very shortly cylindrical belt 0.3–0.4 mm long, distinctly clubbed.  Petals 4–5 mm long, ciliolate.  (Central and southern wheatbelt.)"	"Chamelaucium sp. Merredin (G.J.Keighery & N.Gibson 6320)"
34	"Substigmatic hairs in a shortly cylindrical belt 0.5–1 mm long, acute.  Petals 5–7.5 mm long, entire or denticulate."	35
35	"Leaves broadly obtuse to acute.  Bracteoles with rounded apex, the keel  not compressed.  (Lake King area to Israelite Bay.)"	"Chamelaucium megalopetalum"
35	"Leaves acute.  Bracteoles with a compressed protruding keel at the apex.   (Merredin to Kondin and Dragon Rocks.)"	"Chamelaucium sp. 'Kondinin'"
36	"Sepals entire.  Petals deep pink at anthesis.  Staminodes much shorter than the antipetalous filaments (Yuna-Irwin River area.)"	"Chamelaucium sp. Yuna (A.C.Burns 53)"
36	"Sepals denticulate or ciliolate to fimbriate.  Petals white to medium pink at anthesis.   Staminodes longer than to somewhat shorter than the antipetalous filaments"	37
37	"Peduncles 8–15 mm long.  Petals pale to medium pink at anthesis.     (Yalgoo to Perenjori.)"	"Chamelaucium sp. Yalgoo (Y.Chadwick 1816)"
37	"Peduncles 0.4–7 mm long.  Petals white or pale pink at anthesis."	38
38	"Leaves tapering to a narrow apex; margins denticulate to ciliate.  Hypanthium not ribbed.  (Stirling Range and South Stirling area.)"	"Chamelaucium confertiflorum"
38	"Leaves with a broad obtuse apex; margins entire or denticulate.  Hypanthium longitudinally ribbed."	39
39	"Sepals 2–3 mm long.  Foveolae absent.  Staminodes longer than the antipetalous stamen filaments.  (Quairading to Dumbleyung.)"	"Chamelaucium sp. Dryandra (D.Rose 446)"
39	"Sepals 0.7–1.75 mm long.  Foveolae 10 or absent.  Staminodes about as long  as the antipetalous stamen filaments."	40
40	"Leaves mostly in dense clusters, all or mostly thicker than broad.  Hypanthium dull, densely covered by a minute reticulate-pitted pattern, the pits each containing a small gland.  (Mount Magnet area to Morawa to central wheatbelt.)"	"Darwinia thryptomenoides"
40	"Leaves not in dense clusters but sometimes dense along the stems, all or mostly wider than thick.  Hypanthium often glossy, prominently ribbed  and with a larger and more irregular patterning than the above."	41
41	"Leaves mostly moderately to widely spaced along the stems.  Flowers 6–10 mm diam.  (Central wheatbelt to south coast.)"	"Chamelaucium pauciflorum"
41	"Leaves mostly densely arranged along the stems. Flowers 9–14 mm diam. (South Stirlings to Cape Riche.)"	"Chamelaucium sp. Cape Riche (C.A.Gardner 2153)"