PI 477992 (T 5645) was collected in Canada in 1968 and has been evaluated at Bismarck, ND. Probable hardiness USDA Zone 3a.
Celtis occidentalis L. This large tree has been used successfully in windbreak and street plantings. One of its most notable features is the presence of corky, irregular bark on mature trunks and older branches. The selected population distributed here has been made and named by the USDA Natural Resource Conservation Service at the Bismarck, ND Plant Materials Center and is especially well adapted to northern Great Plains conditions.
PI 476982 (T 5725) 'Oahe' was collected in Gettysburg, SD in 1937 and has been evaluated in North and South Dakota. Probable hardiness USDA Zone 3a.
Populus balsamifera L. The identification of this accession is somewhat unclear. The plants appear similar to P. X gileadensis, but the stems and leaves are not hairy. This collection should be especially well adapted to higher elevations.
PI 495902 was collected in the town of Kremmling, Grand Co., Colorado, elevation 2211 m, by J. Klett and J. Feucht in 1984. This accession was propagated vegetatively. Probable hardiness USDA Zone 2.
Rhus aromatica Ait. var. serotina (Greene) Rehd. This deciduous shrub grows to a height of 3 meters. The plants are drought tolerant, fruit heavily, and have dark red fall color. The selected population distributed here was made USDA Natural Resources Conservation Service at the Manhattan, KS Plant Materials Center and is known to be well adapted in much of Oklahoma, Kansas, and Nebraska.
PI 477981 (T 4404) 'Konza' was originally collected from superior plants growing on limestone breaks south of Manhattan, Riley Co., Kansas in 1958 and has been evaluated in Oklahoma, Kansas, and Nebraska. Probable hardiness USDA Zone 3b.
Sambucus sibirica Nakai. This large, thickly branched, deciduous shrub is the Siberian counterpart to S. racemosa L. and S. pubens Michx. The flowering panicles are often wider than they are long. The fruits are bright red.
Ames 4961 was collected in the Yakut ASSR of the former Soviet Union by T. Antonio in 1984, along the base of cliffs at Stolbi Lenaski. Plants are donated by the Chicago Botanic Garden, Glencoe, IL. Probable hardiness USDA Zone 2.
Sambucus tigranii N. Troitzky. This elder is another counterpart to S. racemosa and is only found in the Caucasus Mts. The fruits are a bit larger than our native S. pubens and are an intense coral-red color.
Ames 4962 was collected in the Armenian SSR of the former Soviet Union by T. Antonio in 1984, in a disturbed area above the Sevan-Erevan highway, ca. 20 km north of Erevan, in rocky, well -drained soil. Approximate coordinates 40° 20' N, 44° 38' E. Plants are donated by the Chicago Botanic Garden , Glencoe, IL. Probable hardiness USDA Zone 4b.
Shepherdia argentea (Pursh) Nutt. This large shrub with silvery leaves is similar in appearance to Russian olive. It is well adapted to poor, alkaline soils and droughty conditions. The selection distributed here was made by the USDA Natural Resources Conservation Service at the Bismarck, ND Plant Materials Center and is known to be well adapted to the northern Great Plains.
PI 478005 'Sakakawea' was originally collected at the Agriculture - Agri-Food Canada Morden Research Station , Morden, Manitoba in 1954. Probable hardiness USDA Zone 2.
Sorbus tianshanica Rupr. This small tree with lustrous leaves and stems is similar to S. aucuparia L. in that it has bright red, globose fruits and densely villous winter buds. It is native to central Asia and has not been rated sufficiently hardy for the upper Midwest by Rehder or Hortus Third. However, the accession distributed here was produced from a small tree growing successfully at Morden, Manitoba.
Ames 2819 was received as seed from the Agriculture - Agri-Food Canada Morden Research Station , Morden, Manitoba in 1984. Probable hardiness USDA 3b.
Links:
1986 Plant List
List of all Accessions Evaluated: 1984 to Present
NC7 Ornamental Homepage
NC7 Plant
Introduction Station Homepage