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Filtering by: Creator Johnston, L. D. (La Rea Dennis)

A taxonomic study of the vascular flora on Ashland Peak, Jackson County, Oregon

Creator:

Johnston, L. D. (La Rea Dennis)

Resource Type:

Masters Thesis
Aquatic plants of the Pacific Northwest, with vegetative keys

Creator:

Steward, Albert Newton, 1897-1959, Gilkey, Helen M., 1886-1972, and Johnston, L. D. (La Rea Dennis)

Abstract:

Second edition

Resource Type:

Book

Full Text:

Northwest With Vegetative Keys, A. N. Steward, La Rea J. Dennis, and Helen M. Gilkey 12. Winter Twigs, a
Aquatic plants of the Pacific Northwest, with vegetative keys

Creator:

Steward, Albert Newton, 1897-, Johnston, L. D. (La Rea Dennis), and Gilkey, Helen M., 1886-1972

Resource Type:

Book

Full Text:

. Aquatic Plants of the Pacific Northwest with Vegetative Keys, by A. N. Steward, La Rea Dennis, and Helen M
Livestock-poisoning plants of Oregon

Creator:

Gilkey, Helen M., 1886-1972 and Johnston, L. D. (La Rea Dennis)

Abstract:

Yearly livestock losses from plant poisoning in the United States amount to many millions of dollars. Although the annual toll from this cause in Oregon is not spectacular, its increase in recent years justifies calling attention to the better known toxic plants. In this manual we have attempted to bring...

Resource Type:

Technical Report

Full Text:

Herbarium. La Rea J. Dennis, assistant curator of the Herbarium. Acknowledgments: The authors express