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Filtering by: Creator Cowlitz Valley Ranger District (Agency : Wash.) Remove constraint Creator: Cowlitz Valley Ranger District (Agency : Wash.) Academic Affiliation Botany and Plant Pathology Remove constraint Academic Affiliation: Botany and Plant Pathology Degree Level Doctoral Remove constraint Degree Level: Doctoral

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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
    Full Text:
    side of Lost Lake. 335 Idaho: Valley Co., So. Fk. Salmon R., ca.13 mi. N of Knox. 354a Oregon

  • Contributions to the plant ecology of the Oregon coastal sand dunes

    Creator:
    Wiedemann, Alfred M.
    Abstract:
    Sand dunes are found along the coasts of most of the large land masses of the world. Because of their proximity to man and his activities, the maritime sand dunes of Europe, particularly Germany, France, Holland and Scandinavia, have the longest history of stabilization activities and botanical investigation. There are...
    Resource Type:
    Dissertation
    Full Text:
    Hebo Ranger Station, Hebo, Oregon; and at the Smith River Ranger Station, Gardiner, Oregon. Special