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Layla J. Dunlap, Jeremiah R. Pinto and Anthony S. Davis

experiment was conducted to compare morphological and physiological characteristics of red-flowering currant ( Ribes sanguineum Pursh) grown using different fertilizer types in a closed subirrigation system and to examine possible residual effects. We also

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Kim E. Hummer

Several species of Ribes have ornamental qualities worthy of consideration in residential and commercial temperate zone landscape plantings. Ribes sanguineum Pursh has been selected and cultivated throughout the Pacific Northwest, and boasts of early spring flowers of white, pink, or red. The two species of golden currants, R. aureum Pursh and R. odoratum Wendl. f., have brilliant yellow-fl owered racemes. Ribes species exhibit a broad diversity of plant habit and texture ranging from the upright 2.5 m, vigorous, and fully armed Menzieís Gooseberry, R. menziesii Pursh, to the prostrate shade-loving Crater Lake currant, R. erythrocarpum Coville & Leiberg. R. viburnifolium A. Gray remains evergreen in mild climates throughout the year. The foliage of some selections of R. americanum Miller and R. cynosbati L. brighten to a brilliant crimson red in the fall. The fall foliage of other species, such as R. hirsuta L., develop a continuum of color on their branches, from bright red at the apex, through orange and yellow to green towards the base. Spring bloom data and ratings of fall color for species in the Corvallis Repository collection will be described.

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Ryan N. Contreras and Mara W. Friddle

Flowering currant ( Ribes sanguineum Pursh.), also known as winter currant, is native to the West Coast of the United States, primarily west of the Coast Range from southern California north to British Columbia with populations also occurring in

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Kim E. Hummer

American species of Ribes aureum Pursh, R. americanum Mill., R. pinetorum Greene, and R. mescalerium Coville are represented. In addition, ornamental flowering currants such as R. sanguineum Pursh, R. speciosum Pursh, R. viburnifolium A. Gray

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Jason D. Lattier, Hsuan Chen and Ryan N. Contreras

sizes of 1.54–24.7 pg. Ribes sanguineum Pursh is reported to be a diploid 2 n = 2 x = 16 ( Darlington and Wylie, 1956 ) with a holoploid genome size of 1.94 pg (OPBL, unpublished data). Roots were collected from an open-pollinated seedling of R

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Tyler Hoskins and Ryan N. Contreras

other taxa. Ribes sanguineum ‘Oregon Snowflake’ was developed using EMS treatment, which resulted in increased branching, reduced plant height, and altered leaf morphology ( Contreras and Friddle, 2015 ). Greer and Rinehart (2009) recovered dwarf