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Filtering by: Alt title The geology of Cedar Butte, northern Coast Range of Oregon Remove constraint Alt title: The geology of Cedar Butte, northern Coast Range of Oregon Advisor Chambers, Kenton L. Remove constraint Advisor: Chambers, Kenton L.

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  • A systematic study of Lathyrus vestitus Nutt. ex T. & G. (Fabaceae) and allied species of the Pacific Coast

    Creator:
    Broich, Steven L.
    Abstract:
    Eight species of Lathvrus (Fabaceae, Faboideae) endemic to the Pacific Coast of North America were the subject of a systematic investigation. Taxa studied included Lathvrus vestitus, Nutt. ex T. & G., L. laetif lorus Greene, L.. iepsonii Greene, £,. splendens Kellogg, L. polvphvllus, Nutt. ex T. & G., L. holochlorus...
    Resource Type:
    Dissertation
    Full Text:
    ). Field trips throughout western Oregon and the coast ranges of California were made in June of 1979

  • Biosystematic studies of Phacelia capitata (Hydrophyllaceae), a species endemic to serpentine soils in southwestern Oregon

    Creator:
    Shelly, J. Stephen
    Abstract:
    Phacelia capitata Rruckeberg is a member of the Phacelia magellanica polyploid complex (species group Magellanicae), a group of wide-ranging, polymorphic perennials in western North America related to the South American P. secunda (= P. magellanica). The purpose of this project was to determine, to the extent possible, the interrelationships of...
    Resource Type:
    Masters Thesis
    Full Text:
    , and on the east by a portion of the Cascade Range. The northern contact with the Oregon Coast Range

  • 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:
    California. The Klamath Mountain region is bordered by the Coast Ranges of Oregon and California to the west

  • A revision of Juncus subgenus genuini (Juncaceae) in the Pacific states

    Creator:
    Lint, Harold LeRoy
    Abstract:
    A study was made of the subgenus Genuini of the genus Juncus in the Pacific States, California, Oregon and Washington. Extensive morphological comparisons, geographical distributions, habitat differences and observations of apparent presence or absence of natural hybrids provided the major data sources. Cytological studies were made, but were inconclusive. Eleven...
    Resource Type:
    Dissertation
    Full Text:
    . gracilis, especially near the coast in northern Oregon and western Washington. Juncus effusus subsp

  • 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:
    the southern Oregon coast. Journal of Geology 52: 35-46. 1964. Geology of Oregon. Zd ed. Eugene

  • Phenotypic variation in diploid and tetraploid populations of Claytonia perfoliata (s.l.) (Portulacaceae)

    Creator:
    Miller, John M.
    Abstract:
    Meiotic chromosome counts from 200 populations of Claytonia (Montia) perfoliata (sensu lato) reveal a polyploid pillar complex based on three morphologically different, chemically distinct, and geographically defined diploids. The basic chromosome number is x=6. Diploid C. perfoliata Willdenow with linear juvenile leaves and deltoid mature basal leaves ranges southeastward from...
    Resource Type:
    Dissertation
    Full Text:
    granitic scree and talus. In the northern section of its range, especially at low elevations in the Santa

  • Autecology, reproductive ecology, and demography of Astragalus australis var. olympicus (Fabaceae)

    Creator:
    Kaye, Thomas N.
    Abstract:
    The goal of this study was to gather information on the autecology, reproductive ecology, and population dynamics of Astragalus australis var. olympicus as a baseline for conservation strategies and to help explain its restricted range. Approximately four thousand individuals occurred in four known population centers in the Olympic Mountains, Olympic...
    Resource Type:
    Masters Thesis
    Full Text:
    were probably only one group in a series along the northern Pacific Coast of North America, including

  • A biosystematic study in the genus Aster, section Aster, in western North America

    Creator:
    Dean, Milton Lee
    Abstract:
    A biosystematic investigation was undertaken in 15 species and three subspecies of the genus Aster, in western North America. Previous studies had been based entirely on external morphological features, and it was believed that much could be learned about the natural affinities of the taxa by exploring their cytological and...
    Resource Type:
    Dissertation
    Full Text:
    OREGON STATE UNIVERSITY in partial fulfillment of the requirements for the degree of DOCTOR OF