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Filtering by: Creator Condón, S. Remove constraint Creator: Condón, S. Advisor Chambers, Kenton L. Remove constraint Advisor: Chambers, Kenton L.

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  • Cytogeography of Achillea millefolium L. in western Oregon

    Creator:
    Tyrl, Ronald J.
    Abstract:
    A cytogeographic study, the relationship between chromosome number and geographical and ecological distribution, was made of the tetraploid and hexaploid chromosome forms of Achillea millefolium L. in western Oregon. Principal objectives of the investigation were three. First was a determination of the exact distributions of the two levels, as previous...
    Resource Type:
    Masters Thesis
    Full Text:
    ) presented on (Major) M. S. (Degree) July 24, 1967 (Date) Title: CYTOGEOGRAPHY OF ACHILLEA

  • Taxonomy and ecology of Mentzelia mollis Peck and related species

    Creator:
    Glad, Judith B.
    Abstract:
    A study was made to clarify the relationships of Mentzelia mollis Peck and two poorly understood taxa of Mentzelia (Loasaceae) to the other members of the genus, its sections, and its subsections, and to describe the general ecology of each taxon. Within the genus, the section Trachyphytum is characterized by...
    Resource Type:
    Masters Thesis
    Full Text:
    classify them in the correct subgenus and section(s) of the genus Mentzelia. 3 II. LITERATURE REVIEW

  • Ecology and reproduction in Collomia macrocalyx Brand (Polemoniaceae)

    Creator:
    Joyal, Elaine
    Abstract:
    Populations of Collom ia macrocalyx Brand were located and observed in order to determine the distribution, ecology, and reproductive biology of this species and probable relationships to other members of the genus. The purpose of the study was to obtain information that would explain the restricted range of the species...
    Resource Type:
    Masters Thesis
    Full Text:
    ); Stockholm (S); Smithsonian (US); University of Oregon (ORE); University of Washington (UW); and Washington

  • The gene-ecology of Crepis nana Richardson and Crepis elegans Hooker in Arctic and Alpine North America

    Creator:
    Legge, Allan Herbert, 1942-
    Abstract:
    A gene-ecological transplant study was made on populations of the Crepis nana and C. elegans complex from the Arctic and Alpine of North America. Transplants were collected from the Brooks Range, Eagle Summit, and Alaska Range in Alaska, the Rocky Mountains in Alberta, the Olympic Mountains in Washington, the Wallowa...
    Resource Type:
    Dissertation
    Full Text:
    alternating o C (38°F s temperature of 3. 5°C - 14. 58°F), night to day respec- tively, was judged to be

  • Systematic and reproductive studies of Mimulus (Scrophulariaceae) in the Pacific Northwest : implications for conservation biology

    Creator:
    Meinke, Robert James
    Abstract:
    The Mimulus washingtonensis complex is a group of morphologically similar species centered in the Pacific Northwest. All are rare, and most are under consideration for listing as endangered. Morphometric and pollination data were used in developing a revised taxonomy for the group. Five species and two varieties are recognized. Mimulus...
    Resource Type:
    Dissertation
    Full Text:
    4.4 1/41) 2.4 O E O = C) 71 0 .4 a. 5 wo -1.6 -3.6 ° . 5e .8 .s af ..o . go eeo%t°1 .1 .2