1	"Involucral bracts distinctly pectinate"	2
1	"Involucral bracts entire or minutely crenulate"	7
2	"Cyathia 4-5 mm in diameter; capsules about 6 mm in diameters"	"Euphorbia gypsophila"
2	"Cyathia 1-1.5 mm in diamter; capsules at least 13 mm in diameter"	3
3	"Capsules subglobose, without ornamentation"	4
3	"Capsules ornamented with fleshy, longitudinal ridges or projections"	5
4	"Mature leaves and capsules glabrous"	"Euphorbia nogalensis"
4	"Mature leaves and capsules pubescent"	"Euphorbia kiritensis"
5	"Glandular processes 5-10, about 1 mm long, with minutely bifid tips; capsules with winged ridges"	"Euphorbia giumboensis"
5	"Glandular processes 2-7, 1-3.5 mm long; capsule ridges not winged"	6
6	"Leave sparsely hairy on the margins; cymes in 2-3 branched umbles with rays less than 1 cm long"	"Euphorbia appendiculata"
6	"Leaves pubescent on the lower surfaces; cymes in 3-6-branched umbels with rays 1-1.5 cm long"	"Euphorbia carinulata"
7	"Ovaries exserted on reflexed pedicels, glabrous with deeply corrugated surfaces"	"Euphorbia leucochlamys"
7	"Ovaries sessile or subsessile, usually pubescent, rarely glabrous, with smooth surfaces"	8
8	"Involuvral bracts minutely crenulate; capsules about 1.5 mm in diameter"	"Euphorbia grosseri"
8	"Involucral bracts entire; capsules 3.5-8 mm in diameter"	9
9	"Leaves at least 3 cm long; inflorescence bracts conspicuous, white or yellowish"	10
9	"Leaves up to 2.5 cm long; bracts similar to the leaves but much smaller or scarious"	11
10	"Leaves oblanceolate to panduriform; cyathia about 1 cm in diameter"	"Euphorbia jatrophoides"
10	"Leaves linear; cyathia about 6 mm in diameter"	"Euphorbia kelleri"
11	"Plants shrublets, to 0.3 m tall"	12
11	"Plants shrubs or small trees, 0.5-4 m tall"	13
12	"Branches erect, intricately rebranching; branchlets very numerous, thin, and and usually contracted; leavesoblanceolate 10-18 mm long"	"Euphorbia intricata"
12	"Branches horizontally spreading, with branchlets at right angles; leaves obovate, 5-8 mm long"	"Euphorbia dunensis"
13	"Branching alternate or dichotomous"	"Euphorbia cuneata"
13	"Branching regularly trichotomous"	"Euphorbia tripartitus"