value of this wood, walnut plantations have been established. Missouri is 
a favorable walnut-growing state, and historically has produced over 1/6 
of all black walnut wood. 
Walnuts reduce competition from surrounding vegetation by producing 
their own natural herbicides. This makes it difficult to grow grass or 
shrubs under these trees. You may notice this in the walnut grove 
northwest of the Lehmann Rose Garden. 
Juglans is the classical Latin name for the walnut, and nigra means 
“black”. 
Juglans nigra, female flowers 
See Map: E, 18, 19, 20 
CHINESE SPINDLETREE 
Euonymus bungeana 
The horticulturally prominent genus 
Euonymus, with over 150 species, is native 
to Asia, Europe, Africa, Australia, and 
North America. 
Familiar members of Euonymus include 
the burning bush (E. alata), which is used 
heavily in landscaping for its flaming 
orange-red or scarlet fall color; other 
shrubby species (E. japonica, E. kiautschov- 
ica, E. europaea); and a vining groundcover 
(E. fortunet). Native to Missouri are the 
shrubs wahoo (E. atropurpurea) and straw- 
berry bush (E. americana), and the trailing 
vine known as running-strawberry-bush 
(E. obovata). Most of the species mentioned above can be found at the Mis- 
souri Botanical Garden. Particularly dazzling in the autumn is the 
burning bush in the Japanese Garden and in the Knolls. 
8 
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