Abstract
1. Marked differential growth responses were exhibited by Sequoia gigantea seedlings grown under various photoperiods. A single observed case of cone formation by an 11-month-old seedling was apparently not a response to photoperiod, since none of the experimental treatments subsequently tested resulted in further fruiting. 2. Growth as measured by main axis heights, number and total length of primary branches, and stem diameters was depressed by short photoperiods and stimulated by long photoperiods, while intermediate photoperiods produced intermediate amounts of growth. 3. Certain photoperiodic effects on bud characteristics, including the size and shape of bud leaves and degree of node and internode compaction within the bud, were also noted.
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