They had good reason to think that.
"Those too stoned or impatient to count out hundreds o morning-glory seeds may find Hawaiian baby wood rose (Argyreia nervosa), another legal member of the bindweed family, easier to handle.
Because these seeds are so large, it only. takes from four to eight to get the tripper on his way. The immature seeds from this plant contain a healthy dose of lysergic acid amides, strychnine, and several other alkaloids. Both in terms of effect and chemistry, Hawaiian baby wood rose is almost identical to the more potent varieties of LSD-like morning-glory seeds."
I'd have never known that it had any hallucinogenic properties.
I want a plant that ferments the fruit as it grows and has it's own spout,then I'll start gardening. :O)