1	"Leaves all 1-foliolate or simple."	2
1	"At least some leaves pinnate, 2- or 3-foliolate, or bipinnate."	19
2	"Branches of young plants bearing solitary or paired spines in the leaf axils; fruit a berry containing juice sacs."	Citrus
2	"Branches never bearing axillary spines; fruit dehiscent or drupaceous."	3
3	"Flowers 4-merous, petals and sepals 4."	4
3	"Flowers usually 5-merous and petals and sepals 5, rarely flowers 6-merous."	9
4	"Leaves alternate (P. virgata)."	Philotheca
4	"Leaves opposite."	5
5	"Petals united into a tubular or campanulate corolla, sometimes separating as the flower expands."	Correa
5	"Petals free."	6
6	"Fruit a drupe; ovary with carpels fused into a unit; stamens divergent."	7
6	"Fruit composed of 1–4 basally fused, dehiscent cocci; ovary with carpels ± free; stamens pyramidally arranged and incurved over the ovary."	8
7	"Flowers unisexual; petals persistent in fruit; stigma (in functionally female flowers) broadly 4-lobed."	Sarcomelicope
7	"Flowers bisexual; petals not persistent in fruit, rarely semi-persistent; stigma scarcely differentiated from the style."	Acronychia
8	"Styles terminal or subterminal; leaves usually <8 cm long and <1 cm wide; petals <2 cm long, pink, mauve, white, or bluish; shrubs in open communities."	Boronia
8	"Styles inserted above the middle of each carpel, but not terminal; leaves 8–15 cm long and >1.5 cm wide; petals c. 1.5–2 cm long, creamish; rainforest tree."	Medicosma
9	"Leaves opposite or nearly so."	10
9	"Leaves alternate."	11
10	"Fruit a 5-valved, 5-locular capsule; seeds winged; buds naked; fertile stamens 5 (opposite the sepals) with alternate stamens reduced to staminodes."	Flindersia
10	"Fruit composed of 1–5 dehiscent cocci; seeds not winged; buds with scales completely enclosing the leaf and floral primordia; fertile stamens 10."	Bosistoa
11	"Stamens 5; seeds blue-black, shining, held in dehiscent cocci by the persistent funiculus."	Geijera
11	"Stamens 10; seeds either held in a drupaceous fruit or released from dehiscent cocci."	12
12	"Ovary with carpels fused into a unit; carpels united at maturity; fruit a drupe; rainforest trees."	Halfordia
12	"Ovary with carpels ± free; carpels ± separate at maturity; fruit consisting of 1–5 basally fused, dehiscent cocci; shrubs or occasionally small trees, rarely in rainforest."	13
13	"Calyx minute, hidden among hairs and inconspicuous; petals valvate in bud, stellate-tomentose outside."	Asterolasia
13	"Calyx conspicuous, or if small then petals imbricate in bud."	14
14	"Petals c. 5-veined from base and densely stellate-scaly outside; leaves 3-veined from base; peduncle with several prominent, rounded imbricate bracts."	Eriostemon
14	"Petals 1-veined at base, glabrous, simple or stellate hairy or scaly outside; leaves 1-veined from base; peduncle without prominent bracts, or if present basal."	15
15	"Plants stellate-scaly, especially on young growth."	16
15	"Plants glabrous or with simple or stellate hairs."	17
16	"Anthers basifixed, apex with a prominent spherical gland; bracteoles basal to pedicel and insignificant."	Phebalium
16	"Anthers versatile, without an apical gland; bracteoles medial or supra-medial on pedicel."	Nematolepis
17	"Anthers without a sterile apiculum, although occasionally with a terminal gland, stamens divergent."	Leionema
17	"Anthers with a sterile white apiculum (sometimes minute), stamens usually pyramidally arranged and incurved over the ovary."	18
18	"Anther and apiculum glabrous."	Philotheca
18	"Anther and apiculum pilose."	Crowea
19	"Leaves pinnate with the leaflets alternately arranged on the rachis; fruit an indehiscent berry."	20
19	"Leaves 2- or 3-foliolate to pinnate, or bipinnate with lateral leaflets in opposite pairs on the rachis; fruit either dehiscent or indehiscent (drupe, samara or individual carpels)."	21
20	"Petals <5 mm long, valvate in bud; ovary loculi not twisted; cotyledons thin, folded."	Micromelum
20	"Petals >8 mm long, imbricate in bud; ovary loculi twisted; cotyledons thick, not folded."	Murraya
21	"Rachis of leaves and stems prickly."	Zanthoxylum
21	"Rachis of leaves and stems not prickly."	22
22	"Flowers 4-merous with 4 petals and 4 sepals."	23
22	"Flowers usually 5-merous, with 5 petals and 5 sepals."	29
23	"Fruit an indehiscent drupe, with or without septicidal fissures; ovary with carpels fused into a unit."	Acronychia
23	"Fruit of 2–4 ± free follicles or cocci, dehiscent or rarely indehiscent; ovary with carpels ± free."	24
24	"Stamens 4."	25
24	"Stamens 8."	26
25	"Seeds black and shining, held in dehiscent cocci by the persistent funiculus; rainforest trees with leaflets 2.5–20 cm long."	Melicope
25	"Seeds dull or shiny, ejected from dehiscent cocci; shrubs or small tree chiefly in sclerophyll forest and heath, leaflets 0.2–10 cm long."	Zieria
26	"Ovules 6–8 per carpel; cocci transversely ridged, 6–10 mm long."	Bouchardatia
26	"Ovules 2 per carpel; cocci not transversely ridged, usually <6 mm long."	27
27	"Individual carpels indehiscent in fruit; leaflets usually 8–22 cm long (A. octandra)."	Acronychia
27	"Individual carpels dehiscent in fruit; leaflets usually 0.2–10 cm long."	28
28	"Fruit subfleshy, orange to red; leaves usually 3-foliolate and leaflets 2.5–10 cm long; tree of dry rainforest, restricted to the headwaters of the Clarence and Richmond Rivers (NC)."	Dinosperma
28	"Fruit not fleshy, brown to blackish; leaves 3–11-foliolate or rarely bipinnate, leaflets 0.2–6 cm long; shrubs of heath, woodland and sclerophyll forests; however, if either leaflets >2.5 cm long or plants growing in rainforest, then not in the NC north of Grafton."	Boronia
29	"Fruit a 5-valved, 5-locular capsule or a schizocarp-capsule; fertile stamens 5 (opposite the sepals), alternate stamens reduced to staminodes."	Flindersia
29	"Fruit either an indehiscent samara or composed of 1–5 dehiscent cocci; fertile stamens 10."	30
30	"Leaves alternate; fruit an indehiscent samara, surrounded by a broad, flat, membranous wing when mature."	Pentaceras
30	"Leaves opposite; fruit dehiscent; mature cocci not surrounded by a membranous wing."	31
31	"Ovules 2 per carpel; buds naked; each carpel with a prominent upper abaxial gland."	Acradenia
31	"Ovules 4–6 per carpel; buds with scales completely enclosing the leaf and floral primordia; carpel glands absent."	Bosistoa