Search Constraints

Start Over
Filtering by: Alternative title ssim Urban garden soils in two Pacific Northwest cities Remove constraint Alternative title ssim: Urban garden soils in two Pacific Northwest cities Advisor Chambers, Kenton L. Remove constraint Advisor: Chambers, Kenton L.

Search Results

  • Cytotaxonomic studies in the Artemisia ludoviciana polyploid complex of the Pacific Northwest

    Creator:
    Estes, James R.
    Abstract:
    The Artemisia ludoviciana polyploid complex is a highly polymorphic assembledge of eight taxa in the Pacific Northwest, with a chromosome base number of x=9. A cytogenetic analysis of this complex was carried out to determine the sources of its variation, the types of polyploidy present, and the genetic processes active...
    Resource Type:
    Dissertation
    Full Text:
    ) Title: CYTOTAXONOMIC STUDIES IN THE ARTEMISIA LUDOVICIANA POLYPLOID COMPLEX OF THE PACIFIC NORTHWEST

  • Origin and distribution of polyploid Achillea (Compositae) in western North America

    Creator:
    Tyrl, Ronald J.
    Abstract:
    A cytogeographical study was made of populations of tetraploid (n=18) and hexaploid (n=27) Achillea millefolium (Compositae- Anthemideae) from the Pacific Coast states. There is a complex distributional pattern, involving overlapping ranges, mixed populations, migration of one form into areas occuplied by the other, pentaploid hybrids, and septaploid and octoploid plants....
    Resource Type:
    Dissertation
    Full Text:
    highly polymorphic but divisible in the Pacific Coast states into two ecotypic subspecies. Such a

  • A systematic and ecological study of Astragalus diaphanus (Fabaceae)

    Creator:
    Wright, Carolyn E.
    Abstract:
    Astragalus diaphanus is a rare plant endemic to the John Day River drainage of north-central Oregon. This species has several interesting features, including the dimorphism of its fruit and its geographical isolation from the two nearest taxonomically related species, which occur in Colorado. This study addressed the species' distribution and...
    Resource Type:
    Masters Thesis
    Full Text:
    the two nearest taxonomically related species, which occur in Colorado. This study addressed the

  • The ecology and reproduction of Sophora leachiana Peck (Fabaceae)

    Creator:
    Crowder, Cheryl Alison
    Abstract:
    The goal of the study was to collect data on the ecology and reproduction of Sophora leachiana in order to help explain the rarity and restricted range of this species. There are 13 known populations of S. leachiana, occurring in a 29 by 6.4 km area in the Siskiyou Mountains...
    Resource Type:
    Masters Thesis
    Full Text:
    deCandolle's outline. In addition to the two sections Eusophora and Pseudosphora, Torrey and Gray included