Poster # 53. INOUYE, DAVID^*,1,2, DODGE, GARY^1,2, ¹ University of Maryland, College Park, MD² Rocky Mountain Biological Laboratory, Crested Butte, CO Spring snowpack depth and summer temperature affect flowering phenology and abundance in Mertensia ciliata (Boraginaceae).

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Poster # 54. Haynes, Lori^*,1, Klemens, Jeff¹, Casper, Brenda¹, ¹ University of Pennsylvania, Philadelphia, PA Evidence for senescence through a 17-year study of the herbaceous desert perennial Cryptantha flava (Boraginaceae).

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Poster # 55. Walcek, Jennie^*,1, Sandquist, Darren¹, ¹ Department of Biological Science, Fullerton, CA Age and growth rate determination of threatened tropical dry-forest trees in Hawaii.

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Poster # 56. Cariveau, Daniel^*,1, Sevillano Garcia-Mayeya, Lucero², van der Ohe, Andrea², Brody, Alison³, Irwin, Rebecca⁴, ¹ Colorado State University, Fort Collins, Colorado² Rocky Mountain Biological Laboratory, Crested Butte, Colorado³ University of Vermont, Burlington, Vermont⁴ University of Georgia-Athens, Athens, Georgia Female reproductive biology of a facultative root hemiparasite, Castilleja linariifolia Benth. (Scrophulariaceae).

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Poster # 57. Bourg, Norman^*,1,2, Gill, Douglas¹, McShea, William², Kress, John³, ¹ University of Maryland-College Park, College Park, MD² Conservation and Research Center, Front Royal, VA³ National Museum of Natural History, Washington, DC Fire and its role in metapopulation dynamics of turkeybeard (Xerophyllum asphodeloides), a rare forest herb.

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Poster # 58. Dailey, Theresa^*,1, Liu, Xiao-Chuan¹, Scott, Peter¹, ¹ Indiana State University, Terre Haute, Indiana Nectar rewards of co-flowering spring herbs in woodlands and adjacent agricultural fields.

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Poster # 59. Wilson, Paul^*,1, Castellanos, Maria Clara², Thomson, James², ¹ Dept of Biology, Northridge, CA² Dept of Zoology, Toronto, ON, CANADA Relating pollination-syndrome characters and flower-visitor spectra among species of Penstemon.

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Poster # 60. Sieg, Carolyn^*,1, King, Rudy², Miller, Phil², ¹ USDA Forest Service, Flagstaff, AZ² USDA Forest Service, Fort Collins, CO Using Excel to model plant viability of a threatened plant species.

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Poster # 61. Diez, Jeff^*,1, Pulliam, H. Ronald¹, ¹ Institute of Ecology, Athens, GA Distribution, demography and mycorrhizal interactions of a terrestrial orchid across environmental gradients.

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Poster # 62. Makihiko, IKEGAMI^*,1,2, WHIGHAM, Dennis^1,2, WERGER, Marinus^1,2, ¹ Smithsonian Environmental Research Center (SERC), Edgewater, MD² Department of Plant Ecology, Utrecht University, Utrecht, The Netherlands Ramet Density effect on sexual and clonal reproduction of Schoenoplectus americanus (i.e. Scirpus olneyi ).

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Poster # 63. STINSON, KRISTINA^*,1, ¹ Harvard University, MA, 02138 Local adaptation versus source-sink interactions in marginal populations of high altitude Potentilla species.

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Poster # 64. Bustamante-Ortega, Enriquena^*,1, Búrquez, Alberto, ¹ Instituto de Ecología, Universidad Nacional Autónoma de México, Unidad Hermosillo, Hermosillo, Sonora, Mexico Red, sweet and tasty: fruit production and population structure of organ pipe cactus.

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