1	"Hairs stellate; petals valvate, midvein of petal prominently raised on the outer surface."	2
1	"Hairs simple or absent; petals imbricate (except in B. algida), midvein of petal not prominently raised (except in B. barkeriana)."	17
2	"At least some leaves pinnate with 3–11 leaflets."	3
2	"All leaves simple or 1-foliolate."	12
3	"Leaflets strongly discolorous, indumentum of the lower surface dense and concealing the epidermis."	4
3	"Leaflets slightly discolorous or concolourous, indumentum of the lower surface not dense and not concealing the epidermis."	6
4	"Sepals ovate, 1.5–2 times as long as broad, the apex acute or acuminate; leaves 1-foliolate or 3–7-foliolate."	"Boronia ledifolia"
4	"Sepals narrow-deltate, at least 2.5 times as long as broad, the apex acute; leaves mostly 3–11-foliolate, rarely some leaves 1-foliolate."	5
5	"Largest terminal leaflet >20 mm long; largest lateral leaflets >18 mm long; all leaflets 10–15 mm wide; petals 7–8 mm long; coastal ranges north from Coffs Harbour (NC)."	"Boronia umbellata"
5	"Largest terminal leaflet <25 mm long, largest lateral leaflets <18 mm long; all leaflets 2–7 mm wide; petals 3–12 mm long; chiefly from Bylong to Denman, W part of the Nandewar Ra. and Gibraltar Ra. N.P. (NT, NWS, CWS)."	"Boronia angustisepala"
6	"Midrib not raised on the lower surface of the leaflets."	7
6	"Midrib raised on the lower surface of the leaflets."	11
7	"Sepals narrowly ovate to deltate, at least twice as long as broad."	8
7	"Sepals ovate to deltate, less than twice as long as broad."	9
8	"Leaves with sparse to moderately dense indumentum; stellate hairs sometimes stalked, grey to white, rays of stellate hairs to 0.5 mm long, flexuous and dull; chiefly on the Western Slopes and adjacent ranges, north from Inverell district (NT, NWS)."	"Boronia granitica"
8	"Leaves glabrescent or with a sparse indumentum; stellate hairs not stalked, yellowish; rays of stellate hairs <0.25 mm long, ± straight, shiny; confined to Bolivia Hill (NT)."	"Boronia boliviensis"
9	"Broadest leaflets <3 mm wide; peduncle <3 mm long; leaves rarely 1- or 3-foliolate and then at first few nodes of branch only; in the Coonabarabran to Warrumbungle Ra. district (NWS)."	"Boronia warrumbunglensis"
9	"Broadest leaflets >3 mm wide; peduncle 2–10 mm long; leaves sometimes 3-foliolate or 1-foliolate; mature cocci glabrous or hirsute; at Woodsreef (NWS) and from Lees Pinch to Berrima (CC, CT, CWS)."	10
10	"Leaves dorsiventral with lower surface paler than upper surface; from Lees Pinch to Berrima (CC, CT, CWS)."	"Boronia rubiginosa"
10	"Leaves isobilateral with lower surface similar colour to upper surface; confined to Woodsreef (NWS)."	"Boronia ruppii"
11	"Leaves with a moderately dense indumentum; rays of stellate hairs 0.1–1 mm long;."	"Boronia mollis"
11	"Leaves glabrous or glabrescent; rays of stellate hairs to 0.25 mm long;."	"Boronia fraseri"
12	"Leaves sessile."	13
12	"Leaves petiolate or base so attenuate so as to appear petiolate."	15
13	"Margins of leaves glandular-warty; sepals narrowly ovate to deltate, at least twice as long as broad; rays of stellate hairs usually dull and flexuous."	"Boronia repanda"
13	"Margins of leaves smooth; sepals ovate to deltate, less than twice as long as broad; rays of stellate hairs shiny and usually ± straight."	14
14	"Leaves slightly discolorous, usually glabrescent or rarely with a dense minute indumentum on both surfaces (hirsute Pilliga form); fruit hirsute; Western Slopes (NWS, CWS, NWP)."	"Boronia glabra"
14	"Leaves strongly discolorous, upper surface of leaves glabrous and shiny, lower surface with a dense stellate indumentum: fruit glabrous; coastal areas north from Woolgoolga district (NC)."	"Boronia rosmarinifolia"
15	"Leaves glabrous or glabrescent, only slightly discolorous."	"Boronia ruppii"
15	"Leaves with a dense indumentum (epidermis not visible) on the lower surface (except in some juvenile leaves), adult leaves strongly discolorous."	16
16	"Leaves with upper surface glandular-warty, margins glandular-toothed; leaves papery when dry, not firm."	"Boronia chartacea"
16	"Leaves with upper surface and margins smooth; leaves firm."	"Boronia ledifolia"
17	"Leaves 1-foliolate."	18
17	"Leaves pinnate with 3 or more leaflets."	26
18	"Leaves broad-obovate to circular."	19
18	"Leaves narrower, ± linear or terete to elliptic or obovate."	20
19	"Margins of leaves finely toothed; swollen apex of staminal filaments hairy; style vestigial, obscured by the massively swollen globose stigma."	"Boronia serrulata"
19	"Margins of leaves entire; swollen tips of staminal filaments glabrous; style terete; stigma about as wide as style."	"Boronia rhomboidea"
20	"Leaves terete to semi-terete."	21
20	"Leaves ± flat."	23
21	"Staminal filaments glabrous; inflorescences terminal (though often on short axillary shoots)."	"Boronia deanei"
21	"Staminal filaments ciliate; inflorescences axillary or axillary and terminal."	22
22	"Leaves 2–8 mm long, obtuse; petals tipped with a small but distinct incurved hook, white to bluish mauve, persistent in fruit."	"Boronia coerulescens"
22	"Leaves 8–25 mm long, acuminate; petals lacking an incurved hook, bright pink, not persistent in fruit."	"Boronia falcifolia"
23	"Inflorescences axillary; petals tipped with a small but distinct incurved hook, persistent in fruit; bracts persistent; seeds dull, finely wrinkled."	24
23	"Inflorescences terminal; petals lacking an incurved hook, not persistent in fruit; bracts not persistent in fruit (often falling before flowering); seeds shiny, smooth."	25
24	"Leaves discolorous, darker on upper surface; branchlets glabrous."	"Boronia polygalifolia"
24	"Leaves concolorous; branchlets with 2 longitudinal pilose lines separated by glabrous decurrent leaf bases."	"Boronia nana"
25	"Petals 6–11 mm long; sepals caducous in fruit; bracteoles reduced to minute calli, persistent in fruit."	"Boronia barkeriana"
25	"Petals 3–6 mm long; sepals persistent in fruit; bracteoles scale-like, not persistent in fruit."	"Boronia parviflora"
26	"Petals valvate; leaflets spathulate to broad-spathulate, distinctly darker on upper surface; plant ± branching dichotomously around the exclusively terminal inflorescences."	"Boronia algida"
26	"Petals imbricate; leaflets either not spathulate or if so, then concolorous; plant not branching dichotomously; inflorescences axillary or terminal."	27
27	"Petals tipped by a small but distinct incurved hook, usually persistent in fruit; anther appendage white, contrasting with the brown anther connective; seeds dull, finely wrinkled."	28
27	"Petals lacking a terminal incurved hook, not persistent in fruit; anthers uniformly cream in colour; anther appendage minute or absent; seeds shiny, smooth."	31
28	"Branchlets prominently 4-angled or with 2 deep longitudinal grooves separated by decurrent leaf bases, glabrous; leaves bipinnate."	"Boronia anethifolia"
28	"Branchlets with 2 very shallow pilose longitudinal grooves separated by glabrous to pilose decurrent leaf bases; leaves 3-foliolate to pinnate to bipinnate."	29
29	"Leaflets mostly 3-lobed at apex."	"Boronia anemonifolia"
29	"Leaflets entire."	30
30	"Leaves mostly pinnate to bipinnate; leaflets narrow- to linear-oblong, usually obtuse."	"Boronia bipinnata"
30	"Leaves mostly 3-foliolate; leaflets narrow-elliptic, acute."	"Boronia rigens"
31	"Leaves 3-foliolate; leaflets terete."	"Boronia falcifolia"
31	"Leaves pinnate, usually with 5 or more leaflets; leaflets flat to terete."	32
32	"Swollen tip of staminal filaments densely hairy; style vestigial, concealed by the massively swollen, globose stigma."	"Boronia floribunda"
32	"Swollen tip of staminal filaments glabrous; style terete; stigma about as wide as style."	33
33	"Branchlets glandular-warty, usually hairy."	34
33	"Branchlets not warty, glabrous or sometimes hairy."	36
34	"Leaflets spathulate to broad-spathulate to cuneate; longest leaflets 4–7 mm long."	"Boronia microphylla"
34	"Leaflets mostly narrow-elliptic to oblong; longest leaflets 7–25 mm long."	35
35	"Branchlets glabrous or sparsely hairy between decurrent leaf bases; leaves 45–70 mm long; peduncles 4–15 mm long, pedicels 5–17 mm long."	"Boronia muelleri"
35	"Branches pubescent; leaves 16–26 mm long; peduncles 2–5 mm long, pedicels 5–7 mm long."	"Boronia imlayensis"
36	"Branchlets hairy, sometimes the hairs short and restricted to 2 longitudinal lines separated by glabrous decurrent leaf bases."	37
36	"Branchlets glabrous."	38
37	"Leaflets 0.3–1 mm wide, linear-oblong; sepals and pedicels ± pilose."	"Boronia subulifolia"
37	"Leaflets 1–3 mm wide, mostly narrow-oblong to elliptic; sepals and pedicels glabrous."	"Boronia safrolifera"
38	"Margins of leaflets finely glandular-crenulate; leaflets slightly discolorous, darker on upper surface."	"Boronia thujona"
38	"Margins of leaflets entire; leaflets concolorous."	"Boronia pinnata"