@Y78, can you give us the botanical names of the plants you're referring to? The first seems to be plain old hemlock (Conium maculatum).
I found some articels some says its take 3 hours and painfull paralyze
some says its very quike heart stop
i dont know if its right to tell here somthing ppl get injured
so be carefull!
hemelock
רש××ת ×צ×××× (××¢× 3000) ××× ××¢ ××פ×ש ××¤× ××"× ××תר צ×× ×ש××, ××××ר צ××× ××ר ×©× ×רץ ×שר××.Study of wild plants of the holy land, Israel, ××§×¨× ×§×××ת ××שר××
www.wildflowers.co.il
robinia
מגדיר צמחי הבר של ארץ ישראל.Study of wild plants of the holy land, Israel
www.wildflowers.co.il
oleander
×ר×××£ ×× ××××
www.wildflowers.co.il
Acokanthera spectabili (n/a)
רש××ת ×צ×××× (××¢× 3000) ××× ××¢ ××פ×ש ××¤× ××"× ××תר צ×× ×ש××, ××××ר צ××× ××ר ×©× ×רץ ×שר××.Study of wild plants of the holy land, Israel, ××§×¨× ×§×××ת ××שר××
www.wildflowers.co.il
for this plant only
it says one seed - cause death.
the list was taken from hazard page of poisinons
dont know what realy the effect of each plant
and if diffrence betwen plant to plant.
it seems like if you have the right plant section(juice.fruit etc.)and you take OD its preety sure fatal.(maybe in pain).
some of the plants are sold in nursery to try finding it alone in wild its not easy.
EVERY COUNTRY HAS ITS OWN PLANTS
Meet Five Of The UK’s Most Poisonous Plants
www.iflscience.com
in the end - its need more reaserch.