1	"Stems and leaves lacking latex"	2
1	"Stems and leaves with latex (milky, coloured or clear)"	15
2	"Leaf lamina palmatilobate"	"Ricinus: Ricinus communis"
2	"Leaf lamina otherwise"	3
3	"Male flower sepals imbricate"	4
3	"Male flower sepals valvate"	5
4	"Style reduced to a sessile, 2-(3-)lobed stigma"	Stachystemon
4	"Styles 3, each divided into two (6 stigmatic branches)"	Monotaxis
5	"Leaves opposite"	6
5	"Leaves alternate"	7
6	Herbs	"Mercurialis: Mercurialis annua"
6	"Shrubs or trees"	Mallotus
7	Lianes	Mallotus
7	"Herbs, woody shrublets, shrubs or trees"	8
8	Herbs	9
8	"Woody shrublets, shrubs or trees"	12
9	"Leaf lamina with 2 glands at base"	"Chrozophora: Chrozophora tinctoria"
9	"Leaf lamina lacking glands at base"	10
10	"Leaf lamina with embedded refringent glands on upper surface"	Acalypha
10	"Leaf lamina lacking embedded refringent glands on upper surface"	11
11	"Leaf lamina crenate with 28–38 teeth per leaf"	"Micrococca: Micrococca mercurialis"
11	"Leaf lamina entire or with few (<10) apical teeth"	Amperea
12	"Stipular glands present"	Adriana
12	"Stipular glands absent"	13
13	"Anthers dorsifixed"	Mallotus
13	"Anthers basifixed"	14
14	"Anther thecae vermiform; styles lacerate"	Acalypha
14	"Anther thecae obovoid-cylindric; styles simple"	"Claoxylon: Claoxylon hillii"
15	"Latex whitish; indumentum simple or absent, never stellate or lepidote; petals absent"	16
15	"Latex reddish to yellow or clear; indumentum when present simple, stellate or lepidote; petals present"	20
16	"Inflorescences racemose or spicate; perianth minute or absent; styles usually simple"	17
16	"Inflorescences pseudanthial, male and female flowers reduced and enclosed within a cup-like involucre; perianth present on male flowers; styles usually 2-fid"	19
17	"Male flower calyx laterally compressed; female flowers with glandular stigmas, styles apically divided"	"Homalanthus: Homalanthus novo-guineensis"
17	"Male flower calyx radially symmetrical; female flowers eglandular, styles apically undivided"	18
18	Herbs	"Microstachys: Microstachys chamaelea"
18	"Woody shrubs or trees"	Excoecaria
19	"Petaloid appendages bracteal, opposite male monochasia"	Calycopeplus
19	"Petaloid appendages interbracteal, alternate with male monochasia"	Euphorbia
20	"Leaves lobate to palmatipartite"	"Jatropha: Jatropha gossypiifolia"
20	"Leaves entire"	21
21	"Plants quite glabrous"	Ricinocarpos
21	"Plants with an indumentum of hairs and/or scales at least on young shoots"	22
22	"Foliage indumentum mainly simple trichomes, rarely with occasional stellate trichomes"	"Dimorphocalyx: Dimorphocalyx australiensis"
22	"Foliage indumentum predominantly a mixture of stellate and/or lepidote trichomes and scales"	23
23	"Foliage never viscid; leaves usually stipulate"	Croton
23	"Foliage often viscid; leaves usually exstipulate"	24
24	"Flowers with staminal filaments erect to spreading on a flat or slightly convex to hemispherical receptacle, filaments free"	Beyeria
24	"Flowers with staminal filaments erect to spreading from a central cylindrical column formed by fusion of the filament bases"	25
25	"Disk present in flowers"	Ricinocarpos
25	"Disk absent in flowers"	Bertya