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Word: calendula (lookup in dictionary) (lookup stats)
Dates: during 1960-1969
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Usage:

...produce other new flower strains, Burpee technicians have used X rays to alter the genes of calendula seeds, created a large double-petaled variety. They have treated seeds with colchicine. a chromosome-multiplying alkaloid that increases a plant's size and changes its characteristics. Colchicine has made possible giant marigolds and snapdragons, and fluffy, ruffled zinnias...

Author: /time Magazine | Title: Business: DAVID BURPEE | 6/6/1960 | See Source »

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