Scientific Note: Facultative Perenniality in the Dwarf Sundew (Drosera brevifolia)

Author : James J. Krupa

ABSTRACT: The dwarf sundew (Drosera brevifolia) occurs from Uruguay to Virginia. Disjunct populations occur in the southeastern U.S. with the northernmost in Kentucky. Despite this wide distribution, relatively little is known about the biology of this species. It has been described as both annual and biennial. The endangered Kentucky population is considered biennial, but occasionally, …


The Demography of Gentiana autumnalis in Populations Under Varying Management Regimes in New Jersey

Author : Ryan R. Rebozo

Additional Authors : Lena Struwe, Walter F. Bien

ABSTRACT: Gentiana autumnalis (pine barren gentian) is a rare, fall-flowering perennial that is endemic to pine barren habitat from New Jersey to South Carolina. This disturbance-adapted, early successional species is at risk in New Jersey as a result of human interactions, namely growing season mowing and fire suppression. We used a repeated measures design to …


Aquatic Vegetation of Springs at Buffalo National River, Arkansas

Author : David E. Bowles

Additional Authors : Cameron R. Cheri

ABSTRACT: The biodiversity of freshwater springs in the Arkansas Ozarks is poorly described and has received relatively little attention from researchers. Information on the biodiversity of springs is crucial for their management and conservation. This study describes the aquatic and semi-aquatic plant communities and key habitat features of several springs located at Buffalo National River, …


Germination Traits in the Threatened Southeastern Grassland Endemic, Marshallia mohrii (Asteraceae)

Author : Noah D. Dell

Additional Authors : Quinn G. Long, Matthew A. Albrecht

Marshallia mohrii (Asteraceae) is a perennial forb endemic to grasslands in the southeastern United States. Despite having been listed as federally threatened for three decades, little is known about its biology and life history. In this study, we examined the role of light, temperature, seed age, and cold stratification on seed dormancy break and germination …


Vascular Plant Flora of Stone Mountain Park, DeKalb County, Georgia, Based on Digitized Specimens in the University of Georgia Herbarium (GA)

Author : Wendy B. Zomlefer,

Additional Authors : Ella T. Vardeman, Steven C. Hughes, David E. Giannasi

Stone Mountain in DeKalb County, Georgia, is a large exposed granite monolith, 514 m (1,686 ft) above sea level and covering 230 ha (560 ac). This monadnock is located in the southwestern portion of Stone Mountain Park, comprising 1,300 ha (3,212 ac) owned by the state of Georgia. Recent specimen digitization efforts at the University …


Noteworthy Collections: An Overlooked Specimen of Conyza ramosissima from Virginia

Author : Jill E. Spear

Additional Authors : W. John Hayden

Conyza ramosissima Cronquist (ASTERACEAE) Page County: Rocky slope along road, 5 mi. NW of Luray, 20 June 1950, Bernard Mikula 5222 (FARM). Significance: This is the first report of Conyza ramosissima (syn. Erigeron divaricatus Michaux) from Virginia. The specimen collected by Mikula establishing this record was encountered in the course of a study of herbarium …


The Vascular Flora of Orchard Knob Reservation, Chattanooga, Tennessee

Author : Alaina Krakowiak

Additional Authors : Joey Shaw

Orchard Knob is a 2.5 ha National Military Park near downtown Chattanooga, Tennessee. This historic site protects a bubble of limestone glade and xeric limestone prairie habitat in an otherwise heavily developed, urban area. A floristic survey was conducted across two growing seasons, yielding 212 taxa across 152 genera and 58 families. Seventy-four non-native taxa …


Phenotypic Variation in Climate-Associated Traits of Red Spruce (Picea rubens Sarg.) along Elevation Gradients in the Southern Appalachian Mountains

Author : John R. Butnor

Additional Authors : Brittany M. Verrico, Kurt H. Johnsen, Christopher A. Maier, Victor Vankus, Stephen R. Keller,

Red spruce (Picea rubens) is a long-lived tree species that thrives in cool, moist environs. Its ability to adapt to rapidly changing climate is uncertain. In the southern Appalachian Mountains, red spruce reaches its greatest abundance at high elevations, but can also occur across a range of mid and lower elevations, suggesting the possibility of …


Germination, Survival, and Establishment of a Rare Riparian Species Alnus maritima

Author : Cassie Ehardt-Kistenmacher

Additional Authors : Heather R. McCarthy, J. Phil Gibson

Abstract: Seed mortality due to low winter temperatures has been proposed as an explanation for the lack of seedling recruitment in natural populations of the rare riparian species Alnus maritima, but other factors such as the absence of essential root symbionts or canopy clearing disturbances could also limit establishment of new individuals. We investigated whether …


An Assessment of the Vulnerability of Illinois’ Rarest Plant Species to Climate Change

Author : Brenda Molano-Flores

Additional Authors : David N. Zaya, Jill Baty, Greg Spyreas

Illinois is home to approximately 2,107 native plant species of which about 16% are listed as threatened or endangered (T & E). In addition to the common threats associated with the decline of these species, climate change is a rapidly emerging threat. Climate predictions for Illinois have estimated that summer temperatures will resemble present-day summers …