Date of first flovering for 225 vascular plant species has been recorded during the spring seasons from 1963 to 1969 at Oak Ridge, Tennessee. Sixty species were woody, whereas 165 were classified as herbaceous. This array was comprised of 164 genera representing 70 families. The woody taxa contained observations on 48 genera from 28 families, and the herbaceous plants consisted of 116 genera from 42 families. More species were observed to flower in April than in any other month. Twenty woody species flowered during that month in contrast to 77 herbaceous species. This total represented 52 genera among the herbaceous plants and 17 among the woody plants. These observations are intended to call attention to date of first flowering, and in many cases illustrate the variation observed within a seven year period. Since vegetative growth usually diminishes with the onset of the reproductive life cycle, knowledge concerning date of flowering would be especially valuable in analysis of ecosystems and in biomass estimations.