Character

Euphorbia crenulata

Euphorbia maculata

Euphorbia ocellata

Euphorbia peplus

seed size

2–2.5 mm long

0.7–1.2 mm long

1–2 mm long

1–1.5 mm long

seed surface

sculptured with raised netting

shallowly & transversely wrinkled

smooth to shallowly wrinkled

sculptured with large pits

seed
cross-section

± round to elliptic

4-sided

3-sided to ± round

4-sided to ± round

Character

Euphorbia polycarpa

Euphorbia serpens

Euphorbia spathulata

Croton setiger

seed size

1–1.5 mm long

0.9–1.2 mm long

1.5–2 mm long

3–5(6) mm long

seed surface

smooth

smooth

with thin raised netting

smooth

seed
cross-section

sharply 4-sided

4-sided

elliptic to biconvex

3-sided