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Filtering by: Creator Thompson, Joanne Mann Remove constraint Creator: Thompson, Joanne Mann Advisor Chambers, Kenton L. Remove constraint Advisor: Chambers, Kenton L.

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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
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
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
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
Calochortus howellii : ecology of a rare serpentine endemic, and comparison with the new species, C. umpquaensis (Liliaceae)

Creator:

Fredricks, Nancy Ann

Resource Type:

Masters Thesis

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Academic Affiliation

Botany and Plant Pathology4
Botany1

Advisor

Chambers, Kenton L.[remove]5

Commencement Year

Commencement Year range begin – Commencement Year range end

Current results range from 1966 to 1986

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Committee Member

Frenkel, Robert1
Guerrant, Ed1
Hibbs, David1

Creator

Dean, Milton Lee1
Fredricks, Nancy Ann1
Halse, Richard R.1
Lint, Harold Leroy1
Tyrl, Ronald J.1

Date

Date range begin – Date range end

Current results range from 1966 to 1986

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Decade

1980-19891
1970-19792
1960-19692

Degree Field

Botany3
Botany and Plant Pathology2

Degree Level

Doctoral3
Master's2

Degree Name

Doctor of Philosophy (Ph.D.)3
Master of Science (M.S.)2

Language

English [eng]5

Non-Academic Affiliation

Oregon State University. Graduate School5

Peer Reviewed

No4

Resource Type

Dissertation3
Masters Thesis2

Rights Statement

Copyright Not Evaluated5

Subject

Achillea millefolium1
Calochortus -- Varieties1
Compositae1
Juncaceae1
Phacelia1
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