Two trial sites evaluated this accession through the 5-year evaluation period; one site through the 10-year evaluation period. The Waseca, MN site recommended this accession citing good form and resilient foliage. The Ames, Iowa site trees were severely damaged by deer and did not survive to the 10-year evaluation.
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Asimina triloba PI 495599
Three trial sites evaluated this accession through the 5-year evaluation period; two sites reported on living plants for the entire 10-year period. The Ames, Iowa and Madison, Wisconsin sites both recommended this accession for protected sites. Although the Wisconsin site trees showed slight winter injury some years, overall the trees performed well. Clean, green foliage in summer, and clear, yellow fall color were cited for the trees in Wisconsin. No fall color was observed in Ames and the foliage on trees at that site showed slight wind/sun damage.
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Campsis radicans PI 495600
Four sites evaluated this accession through the 5-year evaluation period; three sites reported on living plants through the 10-year evaluation period. The Chanhassen (Minneapolis area), Minnesota and Madison, Wisconsin sites reported moderate winter injury to twig tips. All three sites that evaluated through the 10-year period reported the foliage was clean all season. No fall color was reported. The Ames and Madison sites reported flowers to be few in number; the Chanhassen site reported flowers to be few to many in number. The Ames and Madison sites both recommended this accession citing a vigorous plant with ornamental flowers and the vine being overall showy. The Madison site qualified its recommendation with the note that the accession did not perform differently from other C. radicans accessions evaluated. The Chanhassen site did not recommend the accession citing its lack of sufficient hardiness.
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Cercocarpus montanus PI 495886
Only one site, Chanhassen, Minnesota reported on living plants through the 5-year period, with all plants dying prior to the 10-year evaluation. The Chanhassen site reported that the plants were not suitable for their location citing winterkill and that the soil was not sufficiently well drained for this accession.
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Cornus amomum PI 468117
Four sites evaluated this accession through the 5-year evaluation period;
three sites reported on living plants through the 10-year evaluation period.
The plants were marginal in Grand Rapids, Minnesota and did not survive
to the 10-year evaluation period. Waseca, Minnesota reported the
foliage was clean all season through the 10-year evaluation period, but
the other two sites reporting through the 10-year period, Absaraka (Fargo),
North Dakota and Ames, Iowa, reported slight foliar damage. The Absaraka
site noted slight alkaline soil reaction and slight Fe chlorosis.
No fall color was reported. The Absaraka and Ames sites reported
the plants produced many flowers and fruit but of average quality.
The Waseca and Absaraka sites noted the overall performance was excellent;
the Ames site reported that the overall performance was medium. All
three sites that evaluated this accession through the 10-year period recommended
this accession. The Ames site qualified this recommendation for windbreaks
and naturalized areas only. The Absaraka site qualified the recommendation
citing poor winter twig color and that, for their site conditions, there
were better C. amomum accessions to choose from.
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Cornus drummondii PI 495604
Five trial sites reported through the 5-year evaluation period; four sites reported through the 10-year evaluation period. The plants were marginally hardy in Grand Rapids, Minnesota and did not survive to the 10-year evaluation period. The Morris, Minnesota and Waseca, Minnesota sites reported the foliage to be clean all season; the Ames, Iowa and Chanhassen (Minneapolis area), Minnesota sites noted slight foliar damage. The Ames site reported the foliage was a glossy, medium-green through the summer. No fall color was reported. The Ames site reported the fruit number to be many but of average quality. The Ames, Chanhassen, and Morris sites reported the overall performance was excellent; the Waseca site reported the overall performance to be medium. The Ames and Chanhassen sites recommended this accession but for windbreaks and suitable sites only. The Morris and Waseca sites did not recommend the accession with the Morris site reporting unusual shape.
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Cornus sericea PI 495887
Six sites reported on this accession through the 5-year evaluation period; four sites reported on the accession through the 10-year period. The Absaraka (Fargo), North Dakota site and the Fairbanks, Alaska site reported losing the plants through winter injuries and drought stress, respectively, prior to the 10-year evaluation period. For sites reporting through the 10-year period, the Waseca, Minnesota site noted the foliage was clean all season; the Ames, Iowa and Chanhassen (Minneapolis area), Minnesota sites reported the foliage was unsightly due to severe leaf spot damage; the Morris, Minnesota site reported the foliage was slightly to somewhat damaged from leaf spot injuries. No site recommended this accession citing severe leaf spot damage and/or poor vigor.
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Euonymus hamiltonianus NA 55282 (PI 560150)
Five sites reported on this accession through the five-year period. Four sites reported on this accession through the 10-year period. The Absaraka (Fargo), North Dakota and Carrington, North Dakota sites reported slight to moderate winter damage to twig tips, and the Absaraka site reported 2,4D damage to foliage. Three sites reported the foliage was clean all season. The foliage was reported to be thick and tough to bold and coarse but attractive. Three sites reported flowers to be many in number but not ornamental. The two North Dakota sites reported the fruit to be many in number and ornamentally showy. All four sites reporting on overall summary found the plants to medium in performance. The Ames, Iowa site did not recommend the accession finding nothing ornamental with the plants. The Chanhassen (Minneapolis area), Minnesota and two North Dakota sites recommended the accession citing the bold coarse foliage, dark-green foliage, and showy fruit capsules but qualified their recommendations citing the need for a slightly hardier accession (North Dakota) and use in hedges and screens (Chanhassen).
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Physocarpus monogynus PI 495901
Four sites reported on this accession through the 5-year evaluation period; two sites reported on plants through the 10-year evaluation period. The plants did not perform well in the Chanhassen (Minneapolis area) and Morris, Minnesota sites and failed before the 10-year evaluation period. The plants showed poor vigor and alkaline soil reactions at the Absaraka (Fargo), North Dakota site. That site also reported stress from leaf blights and inadequately drained soils. The Fairbanks, Alaska site reported the plants showed slight winter injuries but the foliage was clean all season. Flowers were reported to be many in number and showy in display at the Fairbanks site. The flower display in Absaraka was average. Fruit display was not reported to be of ornamental note. The Chanhassen and Absaraka sites did not recommend this accession citing overall appearance, foliar disintegration, and poor adaptation to humid and wet sites. The Fairbanks site did recommend the accession noting the plants vigor and floral display over a long season.
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Platycladus orientalis PI 491521
Five accessions evaluated this accession through the 5-year evaluation period; three sites evaluated the accession through the 10-year evaluation period. The Absaraka (Fargo) and Carrington, North Dakota sites reported the plants were winter killed prior to the 10-year evaluation period. The Chanhassen (Minneapolis area), Minnesota site also reported severe winter injuries. The Ames, Iowa site reported the foliage was clean all season but the winter foliage was unattractive. No site recommended this accession citing winter injuries (Minnesota and North Dakota sites) and ratty appearance (Ames).
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Quercus gambelii PI 495905
Three sites reported on this accession through the 5 and 10-year evaluation periods. The Ames, Iowa site reported two plants died from heavy, poorly drained soils. The Waseca, Minnesota site reported the foliage of this accession to be clean all season; the Absaraka (Fargo), North Dakota and Ames sites reported slight damage to the foliage. No site recommended this accession citing poor to medium performance, suckering, lack of landscape value, and poor site conditions (Ames).
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Quercus muehlenbergii Ames 8714
Three sites reported on this accession through the 5-year evaluation period; two sites reported on the accession through the 10-year evaluation period. The Ames, Iowa and Waseca, Minnesota sites reported the foliage to be clean throughout the evaluation period. No fall color of note was reported although some yellow fall color was noted at the Ames site. The Waseca site did not recommend this accession citing annual winter dieback to the snowline. The Ames site did recommend this accession citing an excellent overall performance, pH tolerance, and good upright form when young. The Ames site reported this was the best accession ornamentally/horticulturally of the 1988 accessions evaluated.
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Rhododendron mucronulatum Ames 6078
No 5 or 10-year evaluations on living plants were completed on this accession.
Rhododendron mucronulatum NA 55181
No 5 or 10-year evaluations on living plants were completed on this accession.
Viburnum dentatum PI 495621
Five sites evaluated this accession through the 5-year evaluation period; three sites evaluated the accession through the 10-year evaluation period. The Grand Rapids and Morris, Minnesota sites reported the plants were killed prior to the 10-year evaluation period. The Ames, Iowa, Chanhassen (Minneapolis area), Minnesota, and Waseca, Minnesota sites reported the foliage was clean all season. The Ames site reported the plants had glossy, medium-green summer foliage with purple/burgundy fall color. The Ames and Chanhassen sites reported flower and fruit numbers were many but of average show. These two sites reported the overall performance of the accession to be excellent. Both of these sites recommended the accession. The Ames site cited a great fruit display and no pest problems. The Chanhassen site noted the clean foliage and its overall performance as a good large shrub.
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Weigela praecox Ames 4583
One site reported on this accession through the 5-year evaluation. No sites reported on plants through the 10-year evaluation. Lack of drought and cold tolerance were cited.
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