| DN2
Populus deltoides x Populus nigra A male clone with a dense, narrow crown of mid-length sharply rising branches. Leaves dark green above with reddish midrib, paler beneath, generally heart-shaped but often with a broadly rounded base, the petiole is 3-5 cm long, red. Flattened side-to-side and the blade, hairless. It is moderately free from disease. Has the most growth potential of any DN clone in north half of Minnesota.
DN34
Populus deltoides x Populus nigra (Eugenei) A male clone with a broadly conical crown of long, rising branches; large trunks, bark light tan with orange cast on branches. Leaves bright green above, paler and a little duller beneath, base broadly rounded, the petiole is strongly flattened side-to-side. It is relatively free from pests and diseases and recommended for use in windbreaks and shelterbelts. Has been planted in the U.S. for nearly 200 years. Most versatile variety.
DN70
Populus deltoides x Populus nigra Clone of uncertain sex, with narrow crown of upright branches; large trunks, tan bark with an orange cast on branches. Leaves dark green above, much paler beneath, with a base flat across to broadly rounded, the petiole is greenish yellow and strongly flattened.
DN182
Populus deltoides x Populus nigra (Raverdeau) Similar to DN34 in growth characteristics and appearance. Has shown susceptibility to canker diseases at some locations at year 5 and after. |
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NE222
Populus deltoides x Populus caudina Narrow crown of upright slender branches, straight trunks. Leaves typically smaller dark green, petiole is dark red and flattened. Moderately disease resistant.
NM6
Populus nigra x Populus maximowiczii A female clone with large, narrowly egg-shaped crown of long, gently to sharply rising branches; large trunks, tan bark on branches. Leave dull dare green above, white beneath, elongately heart-shaped to almost round, the petiole is round and yellowish green. This clone is used extensively in plantation culture in the Great Lakes region. The brittle branches and large leaves make it susceptible to wind damage for use in horticulture and amenity plantings. Susceptible to breakage from wind.
I45-51
Populus deltoides x Populus nigra A male clone with a broad conical crown of long, rising branches from a straight trunk; large trunks are round and strongly tapering; bark tan on branches. Leave slightly bluish green above and beneath, heart-shaped but with a flattened base, tip short-pointed, petiole is pale red, flattened side-to-side. This Italian clone has good growth potential. Has resistance to most diseases with risk increasing with age. More suited for plantation culture than horticultural or amenity plantings. |