Poison Hemlock seeds! Eat it, you die - it is pretty toxic, but for how common it is , it is obviously not a hazard. A lot of bee keepers grow this near their bee housing(?) to help increase honey production as it is a plant that produces lots of nectar for bees and other insects such as butterflies. Likes to grow near water.
Tobacco Plant This plant comes from the same family as the Nightshades and this genus also contains the plants commercially grown to produce tobacco. It contains piperidine alkaloids which are found in poison hemlock, and the pyridine alkaloid Nicotine which has insecticidal properties . Could cause fetal abnormalities in livestock and mso best avoided in tortoises.
If you eat 5 to 10 of these seeds you'll be sent to the moon! It contains LSA, which is much like LSD except for it is less psychoactive by a bit and has a stronger vasoconstrictive effect. Either way - this is a very well known psychoactive seed that is also fun to grow with its large heart shaped leaves and, in time, purple flowers. It is a tropical and grows best in places like Hawaii -- Argyreia nervosa (Hawaiian Baby Woodrose) 10 seeds/pack for $3.50 -- don't get fooled by the Ghana strain!
Oh is that Marijuana? No - but it is a plant that is often sold to look like Marijuana! It is Hibiscus cannabinus - also known as Kenaf. 100 seeds for $3.50, free shipping. This, much like hemp, is notorious for the strong fibers it offers. It grows very very tall.