This book provides documented distributional data on the vascular flora of Georgia. Distributional data for native and naturalized species are presented in the form of county-by-county dot maps. Herbarium specimens, either examined first-hand by the author or specifically cited in revisions and monographs, are the sole source of distributional data. Nomenclature generally follows USDA, SCS-TP-159, National List of Scientific Plant Names, except when a more recent revision is cited.
Land Between the Lakes (LBL) is a 69000 ha tract in western Kentucky and Tennessee between Lake Barkley (an impoundment of the Lower Cumberland River) and Kentucky Lake (an impoundment of the Lower Tennessee River). This area is administered by the Tennessee Valley Authority (TVA) as a demonstration area for recreation, education and conservation.
Noteworthy Collections: Tennessee and South Carolina
The synonymy of Eupatiorum ✕ truncatum, the hybrid of E. perfoliatum and E. serotinum, is discussed. Eupatorium resinosum var. kentuckiense is recognized as con-specific with E. ✕ truncatum. A key is provided for E. serotinum, E. perfoliatum, E. resinosum, and E. ✕ truncatum. A description and a summary of the distribution of E. ✕ truncatum are provided.
A white-flowered form of Pinguicula lutea Walt. is described as f. alba Folkerts and Freeman. Thus far, the form is known only from the Appalachicola region, Liberty County, Florida.
Neviusia alabamensis Gray (Rosaceae), considered one of the rarest shrubs in North America, is endemic to the southeastern United States. Currently, the species is classified as category 2 on the Federal Register and is on state threatened and endangered species lists in Alabama, Arkansas, Mississippi, and Tennessee. Although several new populations were located during this study, the species should be federally protected due to the limited number of populations, small size of several populations, and potentially threatened location of some of the populations.
Germination experiments were conducted on seeds of Aureolaria virginica (L.) Penn. in 1977, 1985, and 1986. The seeds were innately dormant when dispersed in early fall. Dormancy was broken by cold stratification. Optimum stratification temperatures were near 5℃ and the optimum germination thermoperiod was approximately 20/10℃. Higher and lower stratification temperatures and summer-like germination thermo-periods significantly reduced germination percentages. There was a differential seed germination response among years. Maximum germination percentages were not only highest for 1985 but higher germination percentages were achieved after shorter stratification times and significant germination occurred in the higher incubation thermoperiods. These differential results may be associated with clearcutting of two of the collection sites in 1985. The variable stratification and germination response may be adaptations for maximizing the likelihood of surviving in a patchy and unpredictable environment.
A second-growth (60-80 years old) stand of red spruce in Pocahontas County, West Virginia was sampled to quantify stand composition and to compare size class distributions of red spruce with old-growth forests elsewhere. Stand composition was similar to other spruce forests in West Virginia. The size-class distribution of spruce in the second-growth stand was nearly bell-shaped, in contrast to distributions in old-growth forests which have shown an “inverse-J” pattern. The size-class structure of the second-growth forest is a result of a post-logging regeneration pulse.
Eighteen species of the Clusiaceae are members of the Ohio flora: 15 native and one alien species of the genus Hypericum, and two native species of Triadenum. In the latter genus Triadenum virginicum var. fraseri and T. tubulosum var. walteri are new nomenclatural combinations.