Over the past 10 to 20 years, production of prevariety germplasm of native wildflower seeds has risen dramatically in response to the demand for site- or regionally specific ecotype seeds for roadside plantings as well as for ecological restoration
Jeffrey G. Norcini and James H. Aldrich
John Bamberg and Alfonso del Rio
Potatoes are native to the Americas, concentrated in the western mountains extending from southern Chile to southern Utah and Colorado in the United States. The authors here describe their efforts to collect and study populations of the two wild
Abby B. Griffin, Amy N. Wright, Kenneth M. Tilt, and D. Joseph Eakes
soil or root ball on establishment and growth of two native shrub taxa. MATERIALS AND METHODS Plant taxa used in this experiment included Rhododendron austrinum Rehd. (Florida flame azalea) and Itea virginica L. ‘Henry's Garnet’ (‘Henry's Garnet
Lamprini Tassoula, Maria Papafotiou, Georgios Liakopoulos, and Georgios Kargas
character in urban areas, several researchers have turned their interest in native Mediterranean perennials, mostly xerophytes, capable of growing on extensive green roofs ( Benvenuti and Bacci, 2010 ; Kotsiris et al., 2012 ; Nektarios et al., 2011
John M. Englert and Gwen C. Meyer
In recent years the use of native plant materials for conservation and revegetation projects has received increased awareness and interest. The National Plant Materials Center (NPMC), in cooperation with the USDI-National Park Service, is involved in the revegetation of disturbed areas within our National Parks using native herbaceous and woody plants. This involves the collection of germplasm from selected niches within the Parks, an increase in seed and production of transplants, and reestablishment of native communities in natural areas.
One major focus of the program is to develop technology for improving native plant propagation and production, which should make the use of native plants more viable in the commercial sector. Germination of species of Tridens, Dichanthelium, Danthonia, Helianthus, Schizachyrium, and Andropogon has been improved to 80-95% by altering the germination environment. Production of these species in plugs has also been streamlined to maximize space efficiency and provide cost-effective methods for planting native grasses and wildflowers.
Maria Papafotiou, Niki Pergialioti, Lamprini Tassoula, Ioannis Massas, and Georgios Kargas
should be taken under consideration before applying green roof systems in Mediterranean regions are water availability, particularly in those areas with semiarid climate, biodiversity, and local character preservation. The use of native xerophytes in
Robert F. Gorman and Julie Roller
Ten plant species native to southeast Alaska and surrounding regions were selected based on their value as ornamentals, food crops, disturbed site revegetation, and traditional Native American uses. Between 2003–05, seeds, cuttings, rhizomes, and bulbs from the 10 native plant species were collected in Sitka, Alaska, and propagated according to existing plant propagation protocol for each species. The most successful propagation method for each species was determined from field trials. This information was provided through workshops and Extension publications to gardeners in southeast Alaska and other parts of Alaska. The purpose of this project was to enhance growing local native plants as ornamentals, food crops, in disturbed site revegetation and for traditional Native American uses, particularly among native elders unable to collect these plants in the wild. A secondary purpose was to create a market for native plants in southeast Alaska and spawn a cadre of local cottage market gardeners to grow native plants for existing small nurseries. The 10 species selected included: Cornus canadensis, C. stolonifera, Empetrum nigrum, Fritillaria camschatcensis, Linnaea borealis, Oplopanax horridus, Rubus chamaemorus, Vaccinium parvifolium, Vaccinium ovalifolium, and Viburnum edule.
Sandra A. Balch, Cynthia B. McKenney, and Dick L. Auld
Oenothera biennis, common evening primrose, is grown commercially for its seed, which contains high levels of gamma-linolenic acid (GLA), a fatty acid with pharmaceutical and dietary importance. Other native species of Oenothera are being evaluated for the presence of GLA in their seed and their potential as a commercial source of GLA. Native evening primrose species have shown slow emergence and low germination percentages. Studies were conducted to determine the effects of chilling, scarification, and priming on germination of seed for six species of native evening primrose. Overall, seed germination was improved by seed treatments. However, responses to the various treatments differed among species.
Janet Waterstrat, Jacquelyn Deeds, and Richard L. Harkess
Recent trade journals and magazines report a widespread and increasingly popular trend encouraging the use of native plants in the landscape. A random sample of 528 Southern Nurserymen's Association 1996 members were surveyed to determine 1) if they had perceived the trend reported in trade and consumer publications towards the selection of native plants, and 2) if there are consistencies in demographic characteristics and aspects of advertising plans among the respondents. Forty-two percent of those surveyed responded. Respondents perceived an overall interest in native plants higher in 1996 than in 1991. Almost half of the respondents had increased quantity and variety of native plants in response to their perceptions; 28% had not responded in any way. Plant professionals who had responded to the perceived trend did not differ significantly from those who had not on selected demographic characteristics. Selected aspects of advertising did not differ significantly except for the extent to which consumer magazines were used as references for marketing strategies.
Andrew L. Thomas and Denny Schrock
Hundreds of perennial plant species native to the midwestern United States have potential as ornamentals, but information on how best to use such plants in the landscape remains scarce. Many horticulturists are looking for species that perform well under low-maintenance conditions and that also attract and benefit desirable fauna, such as butterflies and birds. While many of our native plants may fit into this category, not all such species will meet aesthetic criteria for home landscapes. Some native species respond to seasonal changes in temperature and rainfall by browning or going dormant. Others have very specific site requirements for moisture, soil, and humidity that may be difficult to meet in an urban landscape, or their size, growth habit, or other characteristics may make them aesthetically undesirable in the typical home landscape. This study evaluated the performance of 67 plant taxa native to the midwestern United States selected for their promising potential in a low-maintenance landscape situation.