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Published online by Cambridge University Press: 12 June 2017
When seed coats of scarlet morningglory (Ipomoea coccinea L.) were pricked with a needle or scarified by H2SO4, seed germination was improved. The highest percent germination was obtained with seeds pricked with a needle or exposed to H2SO4 for 180 min prior to incubation in moist paper towels. Seed planted in a potting mixture of sandy clay loam, ground sphagnum moss, and sand had the highest germination after 75 min exposure to acid. Scarlet morningglory seed germination was highest (74%) between 15 and 30 C after 144 h incubation.