LOS ANGELES — Jack Herer, an energetic advocate for marijuana legalization who achieved worldwide renown after he wrote a treatise extolling the virtues of hemp, died April 15. He was 70.

Herer suffered a debilitating heart attack in September minutes after he delivered a speech at the Hempstalk festival in Portland insisting that marijuana ought to be smoked morning, noon and night.

“You’ve got to be out of your mind not to smoke dope,” shouted Herer, dressed in a shirt and shorts made from hemp.

He never recovered and died at home in Eugene on Tax Day.