Nut Trees

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Nut Trees

The Nut Trees were established in 1982 in the far southwest corner of the 40 acres. Several hybrid and cultivar introductions by the late Archie Sparks, the late Al Ferguson, and Ward Mally exist in this planting. Particular favorites of theirs to propagate were black walnut (Juglans nigra), shagbark hickory (Carya ovata), northern pecan (Carya illinoinensis), and chestnut (Castanea). In some cases, visitors can also identify the graft union for where inter-crossing of hybrids took place. Cultivars in this collection were selected for their large, edible fruits. Other selection features include ease of cracking and self-hulling.

Many nut trees double as attractive ornamental trees with exceptional fall color, but are best tucked-away from high-traffic areas due to their fruitful nature. Selections noted more for shade trees are found elsewhere on the grounds due to having smaller fruits, and thus, less of a hindrance to the public.

The latest addition to this area is a architectural feature called BLUESTEM. This project was created by students from Iowa State University – School of Design, and is given it’s name after the native Iowan tall grass, big bluestem (Andropogon gerardii) that once nearly covered 80% of Iowa. Two hundred tall, thin poles, meet the ground at varying angles and orientations, creating a moiré effect. The visual movement of the space is reminiscent of tall grasses swaying in the wind.

*This page was last updated on July 6, 2018.

Designation Accession# Genus species Cultivar Common Name
Deciduous Tree 150003 Corylus americana Purpleleaf Purpleleaf American Hazelnut
Deciduous Tree 700009 Fraxinus americana White Ash
Deciduous Tree 700010 Fraxinus americana White Ash
Deciduous Tree 850143A Corylus avellana Common Hazel Nut
Deciduous Tree 850143B Corylus avellana Common Hazel Nut
Deciduous Tree 840038 Corylus colurna Turkish Hazel
Deciduous Tree 830234 Tilia heterophylla Linden, Basswood
Deciduous Tree 170010 Castanea  hybrid (dentata x mollissima) American Chestnut
Deciduous Tree 790037 Carya illinoinensis Donnellson Northern Pecan
Deciduous Tree 870007 Carya illinoinensis Gibson Northern Pecan
Deciduous Tree 910065 Carya illinoinensis Le Beau Northern Pecan
Deciduous Tree 860078E Carya illinoinensis Hardy Pecan, Sweet Pecan
Deciduous Tree 860078C Carya illinoinensis Hardy Pecan, Sweet Pecan
Deciduous Tree 860078B Carya illinoinensis Hardy Pecan, Sweet Pecan
Deciduous Tree 860078D Carya illinoinensis Hardy Pecan, Sweet Pecan
Deciduous Tree 920177 Carya laciniosa Kaufman Shellbark Hickory
Deciduous Tree 790041 Carya laciniosa Ross Shellbark Hickory
Deciduous Tree 790034B Carya laciniosa Selbhers Shellbark Hickory
Deciduous Tree 790046 Carya laciniosa Vinton Shellbark Hickory
Deciduous Tree 830258A Castanea  mollissima Chinese Chestnut
Deciduous Tree 830258B Castanea  mollissima Chinese Chestnut
Deciduous Tree 830258C Castanea  mollissima Chinese Chestnut
Deciduous Tree 850153A Juglans nigra Cranz Black Walnut
Deciduous Tree 850153B Juglans nigra Cranz Black Walnut
Deciduous Tree 850153C Juglans nigra Cranz Black Walnut
Deciduous Tree 850148A Juglans nigra Davidson Black Walnut
Deciduous Tree 850148C Juglans nigra Davidson Black Walnut
Deciduous Tree 850148B Juglans nigra Davidson Black Walnut
Deciduous Tree 850149A Juglans nigra Eldora Black Walnut
Deciduous Tree 850149B Juglans nigra Eldora Black Walnut
Deciduous Tree 850150A Juglans nigra Hays Black Walnut
Deciduous Tree 850152B Juglans nigra MS#4 Black Walnut
Deciduous Tree 850152A Juglans nigra MS#4 Black Walnut
Deciduous Tree 890026 Juglans nigra PP #20 Balck Walnut
Deciduous Tree 850146A Juglans nigra Sparks #127 Black Walnut
Deciduous Tree 850146B Juglans nigra Sparks #127 Black Walnut
Deciduous Tree 850157A Juglans nigra Sparks #128 Black Walnut
Deciduous Tree 850157B Juglans nigra Sparks #128 Black Walnut
Deciduous Tree 850147A Juglans nigra Sparks #147 Black Walnut
Deciduous Tree 850147B Juglans nigra Sparks #147 Black Walnut
Deciduous Tree 850151 Juglans nigra Sparrow Black Walnut
Deciduous Tree 850154A Juglans nigra X regia Hybrid Walnut
Deciduous Tree 850154B Juglans nigra X regia Hybrid Walnut
Deciduous Tree 790036 Carya ovata Abundance Shagbark Hickory
Deciduous Tree 810088 Carya ovata Hopson Shagbark Hickory
Deciduous Tree 790045 Carya ovata X cordiformis Vermace Vermace Hickory Hybrid
Deciduous Tree 790038 Carya ovata X illinoinensis Henke Henke Hican (Hickory/Pecan Hybrid)
Deciduous Tree 010094 Carya ovata X illinoinensis Henke Henke Hican (Hickory/Pecan Hybrid)
Deciduous Tree 790043 Carya ovata X illinoinensis Linn #3 Linn #3 Hican (Hickory/Pecan Hybrid)
Deciduous Tree 120001 Quercus palustris Pringreen Green Pillar Pin Oak
Deciduous Tree 850018 Acer platanoides Summershade Summershade Norway Maple
Deciduous Tree 850019 Acer platanoides Superform Superform Norway Maple
Deciduous Tree 790014A Pterocarya rhoifolia Japanese Wingnut
Deciduous Tree 790014B Pterocarya rhoifolia Japanese Wingnut
Deciduous Tree 790014C Pterocarya rhoifolia Japanese Wingnut
Deciduous Tree 010106 Quercus robur x macrocarpa English Oak x Bur Oak
Deciduous Tree 820327A Acer saccharum grandidentatum Caddo Caddo Sugar Maple
Deciduous Tree 830252E Carya species Shagbark Hickory Hybrid
Deciduous Tree 830252H Carya species Shagbark Hickory Hybrid
Deciduous Tree 830252G Carya species Shagbark Hickory Hybrid
Deciduous Tree 880012A Juglans X quadrangulata  White’s Hybrid White’s Hybrid Walnut

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