Abstract
BASKIN, J. M., and C. C. BASKIN (Sch. Biol. Sci., Univ. Kentucky, Lexington 40506). The ecological life cycle of the cedar glade endemic Lobelia gattingeri. Bull. Torrey Bot. Club 106: 176-181. 1979.-Lobelia gattingeri A. Gray is an annual plant species endemic to the cedar glades of the Central Basin of Tennessee and is on the Smithsonian Institution's 1978 list of plant species recommended for threatened status in the United States. Seeds germinate in both autumn and spring, and plants can behave as either winter or summer annuals. The primary period of flowering and seed production is in spring, but in wet summers flowering can occur until October. Seeds are dormant at maturity in spring but some afterripen during summer, so that a portion of them can germinate in light at field temperatures in early autumn. Seeds that do not germinate in autumin are stratified during winter, and this lowers the temperature requirement for germination. Consequently, seeds can germinate in light at habitat temperatures in March and April. A wide range in size and reproductive output exists among plants in a population, and the number of individuals at a given site varies greatly from year to year.
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