''Orbexilum simplex'' is a species of flowering plant in the
legume family known by the common name singlestem leather-root.
It is found in the south-central United States.
References
simplex
In geometry, a simplex (plural: simplexes or simplices) is a generalization of the notion of a triangle or tetrahedron to arbitrary dimensions. The simplex is so-named because it represents the simplest possible polytope in any given dimension. ...
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