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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:: Pacific states AN ABSTRACT OF THE THESIS OF Harold LeRoy Lint for the degree cf Doctor of Philosophy

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:: populations of Claytonia perfoliata (s.l.) (Portulacaceae) AN ABSTRACT OF THE THESIS OF John Michael Miller

A biosystematic study of some North American species of Agrostis L. and Podagrostis (Griseb.) Scribn. & Merr.

Creator:: Carlbom, Curt Gerald, 1932-
Abstract:: A taxonomic investigation was made of 24 taxa belonging to the section Trichodium (Michx.) Trin., of Agrostis, and the genus Podagrostis. Experimental methods were employed, including: uniform garden culture of transplants and plants grown from seeds collected in natural populations; breeding studies; physiological and phenological investigations; cytological studies; ecological studies...
Resource Type:: Dissertation
Full Text:: , John Thomas Howell, C. Leo Hitchcock, Marion Ownbey, Thomas Soderstrom and G. Ledyard Stebbins, Jr

Hybridization between Arctostaphylos viscida and A. canescens in Oregon

Creator:: Gottlieb, Leslie D., 1936-
Abstract:: Arctostaphylos viscida Parry and A. canescens Eastw., two well-known and frequently encountered manzanitas in the Siskiyou Mountains in southwestern Oregon, are shown to hybridize and to produce an extensive series of morphological intermediates. The hybridization occurs wherever populations of these two species meet at contact zones of serpentine and non-serpentine...
Resource Type:: Masters Thesis
Full Text:: counsel and encouragement throughout the study. I also wish to thank Dr. Leroy E. Detling, the curator

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:: migrated into the area. Graham (1965) lists representatives of both 14 geofloras in his description of

An experimental taxonomic study of a northwest American polyploid species, Scrophularia lanceolata pursh

Creator:: Carlbom, Curt Gerald, 1932-
Resource Type:: Masters Thesis

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

Creator:: Thompson, Dennis Dean
Resource Type:: Masters Thesis
Full Text:: 9697; St. John, Davison, English 6 Jones 7403). This area of intergradation is shown in Figures 2 and

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:: described by Brand (1921) from collections made by John B. Leiberg in eastern Oregon. The lectotype (see

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:: Nees was the English botanist, John Lindley, who named and described most of the new Aster species

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

ScholarsArchive@OSU

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

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

A biosystematic study of some North American species of Agrostis L. and Podagrostis (Griseb.) Scribn. & Merr.

Hybridization between Arctostaphylos viscida and A. canescens in Oregon

Taxonomy and ecology of Mentzelia mollis Peck and related species

An experimental taxonomic study of a northwest American polyploid species, Scrophularia lanceolata pursh

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

Ecology and reproduction in Collomia macrocalyx Brand (Polemoniaceae)

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

The ecology and reproduction of Sophora leachiana Peck (Fabaceae)

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