Table 1. Occurrence of EAD-active substances (see Fig. 1) in oil and non-oil plants of different families/genera and floristic regions.

	Holarctic	Afrotemp.	Neotropics	Palaeotropics
Number of taxa studied in floristic regions
families	1	3	6	1
genera	1	7	13	1
oil/non-oil species	7/7	18/0	22/0	3/1
Percentage of oil/non-oil species with a specific EAD-active compound
diacetin	100/14	100/–	73/–	0/0
2-tridecanone	100/0	72/–	55/–	100/100
heptanoic acid	71/0	55/–	23/–	0/0
4-hydroxy-3-methoxystyrene	29/0	50/–	18/–	100/0
unkown (RI 1264)	0/0	17/–	0/–	66/0
geranic acid	29/0	0/–	2/–	0/0
(E)-2-dodecenal	43/0	0/–	0/–	0/0
1-hydroxy-1-phenyl-2-propanone	29/0	0/–	0/–	0/0
3,5-dimethoxytoluene	0/0	11/–	0/–	0/0

Afrotemp.: Afrotemperate region. (For detailed information see Table S1).