Search Constraints

Start Over
Filtering by: Creator Sansome, Constance J. (Constance Jefferson) Remove constraint Creator: Sansome, Constance J. (Constance Jefferson) Academic Affiliation Botany and Plant Pathology Remove constraint Academic Affiliation: Botany and Plant Pathology

Search Results

  • 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:
    five subspecies, J. effusus subsp. pacificus, subsp pugetensi and subsp. austrocalifornicus; J

  • Taxonomy of Phacelia section Miltitzia (hydrophyllaceae)

    Creator:
    Halse, Richard R.
    Abstract:
    A systematic study was made of the species comprising Phacelia section Miltitzia. These species, which are commonly found in the Great Basin physiographic province of western North America, are distinguished from other members of Phacelia by their yellow, marcescent corollas and their transversely corrugated seeds. This project utilized morphological, cytological,...
    Resource Type:
    Dissertation
    Full Text:
    major Chairman of Department of Botany and Plant Pathology Date thesis is presented j /c7f Typed by

  • Taxonomic studies of the Eucephalus complex of Aster in the Pacific Northwest

    Creator:
    Thompson, Dennis Dean
    Resource Type:
    Masters Thesis
    Full Text:
    . Jefferson 42 Eugene and Oakridge 44 Crater Lake 44 Siskiyou Mountains 45 V Discussion and Conclusions 47

  • Benthic algal communities of the Metolius River

    Creator:
    Sherman, Barbara Jane Powell, 1938-
    Abstract:
    Samples of benthic algae were collected from the Metolius River of central Oregon at two-week intervals between April 15, 1967 and March 9, 1968. Species of filamentous algae and diatoms present were recorded for every sampling station on each sampling date. Permanent mounts of diatom frustules were prepared. This sampling...
    Resource Type:
    Dissertation
    Full Text:
    perennial, due, again, to the constance of environmental factors. The delineation of associations of

  • 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:
    Counties. Dr. Jack Lattin, O.S.U. Department of Entomology identified insect taxa. Dr. Lincoln Constance

  • 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:
    appear- ing in W. J. Hooker's Flora Boreali- Americana in 1834, and in A. P. De Candolle's Prodromus