Wood Anatomy Of Gnetales In A Functional, Ecological, And Evolutionary Context,
2012
Santa Barbara Botanic Garden, Santa Barbara, California
Wood Anatomy Of Gnetales In A Functional, Ecological, And Evolutionary Context, Sherwin Carlquist
Aliso: A Journal of Systematic and Floristic Botany
New scanning electron microscope (SEM) and light microscope data and illustrations are presented in order to compare hydraulic adaptations of non-gnetalean conifers and angiosperms to relevant wood features of Gnetales. Gnetales have essentially all of the adaptations of both groups, yet have not competed well, despite predating angiosperms in origin and radiation. Angiosperms may be advantaged more by life cycle abbreviation and by heterochronic possibilities than by wood features. Wood features of Gnetales that relate to conduction (torus-margo differentiation of tracheid pit membranes, distribution of tori within the wood, perforation plate simplification, growth rings, vesturing, helical thickenings, and axial parenchyma) …
Lafferty, Maude (Ward), 1869-1962 (Sc 2616),
2012
Western Kentucky University
Lafferty, Maude (Ward), 1869-1962 (Sc 2616), Manuscripts & Folklife Archives
Manuscript Collection Finding Aids
Finding aid only for Manuscripts Small Collection 2616. Typescript copies of "A Brief Sketch of Rafinesque and the Transylvania Botanic Garden" and the "Journal of Samuel Constantine Ranfiesque," by Maud (Ward) Lafferty, Lexington, Kentucky.
Coombs, Elizabeth Robertson, 1893-1988 (Sc 2633),
2012
Western Kentucky University
Coombs, Elizabeth Robertson, 1893-1988 (Sc 2633), Manuscripts & Folklife Archives
Manuscript Collection Finding Aids
Finding aid only for Manuscripts Small Collection 2633. Original typescript of a Sarah "Sadie" Frances Price bibliography compiled by Elizabeth Robertson Coombs, Bowling Green, Kentucky.
Arkansas Wheat Cultivar Performance Tests 2011-2012,
2012
University of Arkansas, Fayetteville
Arkansas Wheat Cultivar Performance Tests 2011-2012, R. E. Mason, R. G. Miller, J. P. Kelley, E. A. Milus
Arkansas Agricultural Experiment Station Research Series
Wheat cultivar performance tests are conducted each year in Arkansas by the Arkansas Agricultural Experiment Station, Department of Crop, Soil and Environmental Sciences. The tests provide information to companies developing cultivars and/or marketing seed within the state and aid the Arkansas Cooperative Extension Service in formulating cultivar recommendations for small-grain producers.
Verbena Urticifolia L.,
2012
Eastern Illinois University
Verbena Urticifolia L.,
2012
Eastern Illinois University
Acer Negundo L.,
2012
Eastern Illinois University
High School Horticulture Curriculum,
2012
California Polytechnic State University, San Luis Obispo
High School Horticulture Curriculum, Margaret Maratsos
Horticulture and Crop Science
Horticulture is just one of the many topics covered in a high school agriculture curriculum, and yet, there are very few lesson plans or resources available to teachers for these classes specifically. The objectives of this project were to compile a set of lesson plans, lab plans, and tests that would emphasize interactive and investigative learning. The lesson plans were written in such a way that they reflected a certain set of standards, set down by the state of California, and were meant to serve as a bare outline of topics that would be discussed within a week’s worth of …
B.R. Wells Rice Research Studies 2011,
2012
University of Arkansas, Fayetteville
B.R. Wells Rice Research Studies 2011, R. J. Norman, K.A. K. Moldenhauer
Arkansas Agricultural Experiment Station Research Series
No abstract provided.
Geographical Distribution And Survival Of Iris Yellow Spot Virus In Spiny Sowthistle, Sonchus Asper, In Georgia,
2012
Utah State University
Geographical Distribution And Survival Of Iris Yellow Spot Virus In Spiny Sowthistle, Sonchus Asper, In Georgia, Claudia Nischwitz
All Current Publications
No abstract provided.
Tcp Transcription Factor, Branch Angle Defective 1 (Bad1), Is Required For Normal Tassel Branch Angle Formation In Maize,
2012
University of Missouri–St. Louis
Tcp Transcription Factor, Branch Angle Defective 1 (Bad1), Is Required For Normal Tassel Branch Angle Formation In Maize, Fang Bai, Renata Reinheimer, Diego Durantini, Elizabeth Kellogg, Robert Schmidt
Biology Department Faculty Works
In grass inflorescences, a structure called the “pulvinus” is found between the inflorescence main stem and lateral branches. The size of the pulvinus affects the angle of the lateral branches that emerge from the main axis and therefore has a large impact on inflorescence architecture. Through EMS mutagenesis we have identified three complementation groups of recessive mutants in maize having defects in pulvinus formation. All mutants showed extremely acute tassel branch angles accompanied by a significant reduction in the size of the pulvinus compared with normal plants. Two of the complementation groups correspond to mutations in the previously identified genes, …
Closely Paired Flowers Produce Single Fruit,
2012
University of Richmond
Closely Paired Flowers Produce Single Fruit, W. John Hayden
Biology Faculty Publications
Perhaps one of the most striking features of partridge berry (Mitchella repens), the 2012 VNPS Wildflower of the Year, is its closely paired flowers that yield a single berry fruit (figure 1). That these fruits are double structures, formed by pairs of flowers, is revealed in the presence of two discrete rings of five sepals each on the fruit apex, or in some cases, by a single ring of 10 sepals. Viewed in isolation, without context, the nature of these double fruits may seem perplexing, but as in so many things, a comparative perspective helps to make sense …
Sfa Gardens Newsletter, Summer 2012,
2012
Stephen F. Austin State University
Sfa Gardens Newsletter, Summer 2012, Sfa Gardens, Stephen F. Austin State University
SFA Gardens Newsletters
No abstract provided.
Samolus Parviflorus Raf.,
2012
Illinois Natural History Survey
Five Nuclear Loci Resolve The Polyploid History Of Switchgrass (Panicum Virgatum L.) And Relatives,
2012
University of Missouri–St. Louis
Five Nuclear Loci Resolve The Polyploid History Of Switchgrass (Panicum Virgatum L.) And Relatives, Jimmy Triplett, Yunjing Wang, Jinshun Zhong, Elizabeth Kellogg
Biology Department Faculty Works
Polyploidy poses challenges for phylogenetic reconstruction because of the need to identify and distinguish between homoeologous loci. This can be addressed by use of low copy nuclear markers. Panicum s.s. is a genus of about 100 species in the grass tribe Paniceae, subfamily Panicoideae, and is divided into five sections. Many of the species are known to be polyploids. The most well-known of the Panicum polyploids are switchgrass (Panicum virgatum) and common or Proso millet (P. miliaceum). Switchgrass is in section Virgata, along with P. tricholaenoides, P. amarum, and P. amarulum, whereas P. miliaceum is in sect. Panicum. We have …
Traversing Swanton Road, 9th Ed.,
2012
California Polytechnic State University, San Luis Obispo
Traversing Swanton Road, 9th Ed., James A. West
Academic, Government & Associated Organizational Research Resources
Situated at the northwest end of Santa Cruz County and occupying circa 30 square miles of sharply contrasted terrain, the Scott Creek Watershed concentrates within its geomorphological boundaries, at least 10-12% of California's flora, both native and introduced. Paradoxically, the use/abuse that the watershed has sustained over the past 140+ years, has not necessarily diminished the biodiversity and perhaps parallels the naturally disruptive but biologically energizing processes (fire, flooding, landslides and erosion), which have also been historically documented for the area for +60 years. This is an early edition of an extensive document by James A. West. Please visit the …
Herbaceous 2012 (June 3),
2012
University of Dayton
Herbaceous 2012 (June 3), Amy L. Myers, Julia I. Chapman, Ryan W. Mcewan
Data Files: Drew Woods Permanent Plots
Herbaceous vegetation data collected in 2012 at Drew Woods State Nature Preserve in Darke County, OH. Data key is provided in a supplemental file.
Morus Rubra L.,
2012
Illinois Natural History Survey
Morus Rubra L., Loy R. Phillippe, Connie Carroll-Cunningham, Richard L. Larimore, Danielle Ruffatto
Specimens by Name
No abstract provided.
Mapping Plant Biodiversity Hotspots At The County Scale: A New Tool For Establishing Resource Conservation Strategies,
2012
California Polytechnic State University, San Luis Obispo
Mapping Plant Biodiversity Hotspots At The County Scale: A New Tool For Establishing Resource Conservation Strategies, Kristie Haydu
Master's Theses
Myers first identified the world’s 25 biodiversity hotspots and pioneered innovative ideas about the usefulness of biodiversity models for establishing long-term resource conservation strategies at global scales. Since Myers, most of the subsequent studies using hotspot science for biodiversity modeling have used large spatial scales like countries, provinces or states, and other biogeoraphic regions. The California Floristic Province continues to be one of the recognized global biodiversity hotspots. Our study site, San Luis Obispo County is within this hotspot and we created a map of plant biodiversity hotspots at the county scale using GIS technology. We wanted to determine the …
Monitoring Standing Herbage Of Mid-Grass Prairie On The Fort Pierre National Grassland, South Dakota,
2012
USDA Forest Service
Monitoring Standing Herbage Of Mid-Grass Prairie On The Fort Pierre National Grassland, South Dakota, Daniel W. Uresk
The Prairie Naturalist
Monitoring vegetation with a modified Robel pole on the Fort Pierre National Grassland was evaluated for combined shallow clay and loamy overflow ecological sites (dominated by warm-season grasses), and for clayey ecological sites (dominated by cool-season grasses). My objectives were to 1) develop a relationship between visual obstruction readings (VOR) and standing herbage, 2) provide guidelines for vegetation monitoring, and 3) evaluate vegetation monitoring during the growing season for clayey ecological sites. The relationship between visual obstruction readings and standing herbage was linear and regression coefficients were highly significant (P < 0.001) for both ecological types. Cluster analyses for shallow clay and loamy overflow ecological sites grouped the VOR and standing herbage (kg•ha-1) into 4 resource categories. Monitoring with 4 transects will provide adequate information to estimate standing herbage within 259 ha (1 section). Three resource categories (VOR + herbage) for clayey ecological sites were defined by cluster analyses. Monitoring with 4 transects was determined to provide reliable estimates of standing herbage. July validation of vegetation with the developed clayey ecological site model will provide reliable monitoring of standing herbage from July through November for this ecological site.
